BGS logo and link to BGS website homepage

Full listing of The British Geological Survey Lexicon of Named Rock Units

"Albany Mudstones With Limestone Nodules" "Bedded Tuff" "Ferruginous Limestone Series" "Knoll Reef Limestones" "Lower River Terrace Deposits" "Lower" St Bees Sandstone "Meneage Crush Zone" "Red Series" Clays Or Glaciolacustrine Deposits "Sands And Gravels Of Faringdon" "Syenite On Ridge Between Scaw'd Law And Roger Law" "Upper" St Bees Sandstone 'Expanded Standard Black Band Succession' 'F' Seam 'Fereneze Lavas' 'Fulmar Sands' 'Gleniffer Lavas' 'Greystone' 'H' Seam 'Lower Unit' of the Middle Bagshot Beds 'Norwich Chalk' 'Puffin Formation' 'S Airde Beinn Plug 'Syenite' Or 'Diorite Intrusions' 'Varicoloured Unit' Of The Dunrobin Bay Formation (Approximates To Productive Coal Measures) (Kingsteps) Nairn Sandstones (Localised Part Of) Cwm Crychan Formation (Part Of The) Lower Old Red Sandstone (Sandstone In) Cwm Crychan Formation (Unnamed Limestone) (Unnamed) Andesites ? Lateral Equivalent Of Glenfinnan Group ? Lateral Equivalent Of Morar Group ?Glenramskill Formation [Reticuloceras] Bilingue Marine Band 15/16-6 Sand Member 1st Terrace Deposits (River Severn) 1st Terrace Of River Lark (Bristow,1990) 22 Yard Coal (West Yorkshire) 25-Foot Drift Of Vale Of York 27 Yard Coal (West Yorkshire) 2nd Terrace Of River Cam 2nd Terrace Of River Lark (Bristow,1990) 32 Yard Coal (West Yorkshire) 36 Yard Coal (West Yorkshire) 36 Yard Rock 36 Yards Band Coal 3rd Terrace Of River Lark (Bristow,1990) 48 Yard Band Coal (West Yorkshire) 48 Yard Rock 48 Yards Band Coal [West Yorkshire] 4th Terrace Of River Cam 4th Terrace Of River Lark (Bristow,1990) 4th Terrace Of River Lark (Clayton 1983) 5 Foot Vein 5th Terrace Of River Lark 5th Terrace Of River Lark (Clayton 1983) 6th Terrace (River Severn) 80 Yard Band Coal 80 Yard Band Coal (West Yorkshire) 80 Yard Rock A Variety Of Local Names A'Mharagach Member A'Mhoine Psammite Formation A-Bed Evaporite Abbey Conglomerate Abbey Gravel(s) Abbey Head Bed Abbey Head Formation Abbey Head Member Abbey Sand And Gravel Abbey Shale Formation Abbey Wood Member Abbeyhill Shales Abbotsbury Cornbrash Formation Abbotsbury Iron Ore Abbotsbury Ironstone Abbotsbury Ironstone Formation Abbotsford Flags Abbotsford Flags and Grieston Shales Abbotsgrange Beds Abbotsgrange Silt Member Abbotsham Beds Abbotsham Formation Abbrook Clay And Sand Abbrook Clay and Sand Member Abdon Group [Obsolete Name And Code] Abdon Limestone Formation [Obsolete Name And Code] Abdy Coal Abdy Coal (South Yorkshire And North Nottinghamshire) Abdy Rock Aber Geirch Phyllites And Grits Aber Mawr Beds Aber Mawr Formation Aber Mawr Shale Formation Aber Pensidian Mudstone Member Abercastle Beds [Obsolete Name And Code: Use OGH] Aberchirder Pluton Abercorn Main Coal (Glasgow) Abercorn Rough Coal (Glasgow) Abercorn Splint Coal (Glasgow) Abercorn Steam Coal (Glasgow) Abercorn Stony Coal (Glasgow) Abercorn Turf Coal (Glasgow) Abercorris Group Abercriban Oolite Abercriban Oolite Formation Abercriban Oolite Group Abercriban Oolite Subgroup Abercwmeiddaw Group Aberdaron Bay Group Aberdaron Bay Group [Obsolete Name And Code: Use NFR] Aberdaron Formation Aberdeen Division Aberdeen Formation Aberdeen Ground Beds Aberdeen Ground Formation Aberdeen Pluton Aberedw Formation Aberfoyle Slate Aberfoyle Slate Formation Aberfoyle Slates Abergeldie Pluton Abergorki Coal (South Wales) Abergwilli Formation Aberkenfig Formation Aberlady Formation Abersytwyth Grits Formation Aberystwyth Grits Group Abhainn Mhor Gabbro Intrusion Abington Formation Accerhill Sandstone Accerhill Sandstone Formation [Obsolete entry, use ACHS] Accrington Mudstone Acer Hill Sandstone [Obsolete Entry: Incorrect Spelling: See ACHS] Ach'Uaine Cluster Achanarras Fish Bed Member Achanarras Limestone [Obsolete Name And Code: Use AFB] Achateny Breccia Member Achnacarry Striped Formation Achnaconeran Striped Formation Achnacree Sand and Gravel Formation Achnaha Quartz Gabbro Zone Achnaha Quartz-Monzonite Facies Achnaha Tonalite - Quartz-Monzonite Intrusion Achnaha Tonalite Facies Achneim Striped Formation Achray Sandstone Achreamie Sandstone Formation Achrimsdale Sandstone Member Achscrabster Flagstone Formation Achscrabster Flagstone Member Acklington Dyke Acklinton Formation Of Bowen (1999) Acklinton Till Formation Ackton Rock Ackworth Division Ackworth Member Ackworth Rock Acre Coal Acre Coal (Northumberland) Acre Limestone Acre Limestone [Obsolete Name And Code: Use TYL] Acton Group Acton Park Limestone Acton Scott Formation Acton Scott Group Acton Scott Limestone Acton Turville Beds Acuminata Beds Acutistriatum Band Acutistriatum Bed Acutistriatum-Comptoni Bed Adail Mudstones Formation Adamson Band Addingham Edge Grit Addingham High Moor Grit Addlethorpe Grit Addlethorpe Marine Band Adur Valley Formation Adwalton Black Bed Coal Adwalton Black Bed Coal (West Yorkshire) Adwalton Stone Coal Aed Mheall Member (Western Intrusion, Rum Layered Suite) Aegiranum Marine Band Aeolian deposits Afon Gam Formation [Obsolete Name And Code: See DYN] Afton Formation [Obsolete Name And Code: Use KKF] Afton Lodge Clay Formation Aghyaran Formation Agill Sandstone Agill Shale Agneash Grit (Manx Slates) [Obsolete Name And Code: See CGA] Agneash Grits Agnew's Hill Tuff Member Agricultural Cutting Aid Crag Sandstone Aikbank Farm Glacigenic Formation Ailleag Diamicton Formation Ailleag Diamicton Member Ailnack Phyllite And Limestone Formation Ailsa Craig Microgranite Ailstone Member Ailstone Member (Warwickshire Avon) Ailstone Terrace Deposits (Warwickshire Avon) Airdrie Blackband Coal (Central Coalfield) Airdrie Blackband Ironstone (Central Coalfield) Airdrie Virtuewell Coal (Central Coalfield) Airfield Airth Shellband Airy's Bridge Formation Airy's Bridge Group Airy's Bridge Tuff Formation Aisholt Limestone Aisla Formation Aisla Sequence Aislaby Group [Obsolete Name And Code: See ZG] Aith - Spiggie Pluton Akers Steps And St Margarets Members Albany Division [Obsolete Name And Code: Use ALBY] Albany Group Alberbury Breccia Albert Coal (Rothbury Area) [Obsolete Name And Code: Use YARD] Albian Rocks (Undifferentiated) Albion Glacigenic Group Albion Sands Formation Albrighton Coal (Cumbria) Albrighton Coal Group [Obsolete Name And Code] Albrighton Marine Band Albrighton Marine Band [Local Name: Use AMMB] Albrighton Seam (Cumbria) Aldeburgh Member Aldeby Sand And Gravel Member Aldeby Sands And Gravels Alderbury Breccia In Erbistock Beds Alderney Sandstone Alderwood Mudstone Alderwood Mudstone Member Aldie Till Member Aldress Shale Aldress Shale Formation Alecks Coal (Lothian) Alecs Coal (Cheadle) Alkaid Member Alkaline Basic Igneous Rocks In The Orkneys Alla Glen Limestone Member Allargue Graphitic Schist Member Allens Coal (East Midlands) Allenton Sand And Gravel Allenton Terrace Deposits Aller Gravel Aller Gravel Formation Aller Halite Formation Allermuir Group [Obsolete Name And Code: Use ALMR] Allermuir Volcanic Member Allesley Conglomerate Allesley Member Allesley Sandstones And Conglomerates Alloa Cherry Coal Alloa Splint Coal Allt a' Mhuilinn Mudstone Formation Allt A'Chuirn Quartzite Member Allt A'Mhuilinn Pseudoleucite-Syenite And Associated Rocks Allt An T-Srathain Member Allt An T-Strathain Till Member Allt And Odhar Members Of The Allt Odhar Formation Of Bowen 1999 Allt Breac Beds Allt Crom Complex Allt Crom Granodiorite With Rafts Dominantly Of Appinitic Diorite Allt Crom Granodiorite With Rafts Of The Coire Nan Laogh Semipelite Formation Allt Crom Granodiorite With Rafts Of The Garva Bridge Psammite Formation Allt Crom Granodiorite With Rafts Of The Loch Laggan Psammite Formation Allt Crom Granodiorite With Rafts Of The Monadhliath Semipelite Formation Allt Crom Pluton Allt Darrarie Intrusion Allt Ddu Mudstone Formation Allt Ddu Mudstones Allt Ddu Mudstones Formation [Obsolete Name And Code: Upper Part Of CSW] Allt Dhub Member Allt Dregnie Phyllite Member Allt Fawr Rhyolitic Tuff Formation Allt Goch Sandstone Formation Allt Goibhre Semipelite Formation Allt Lwyd Formation Allt Mor Na H-Uamha Member Allt na Beiste Member Allt Na Cuile Sandstone Member Allt Na H'Ath Siltstones Allt Na H-Airbhe Member Allt Nam Biorag Psammite Member Allt Odhar Peat Formation Allt Odhar Peat Member Allt Sgiathaig Till Member Allt-Tair-Ffynnon Formation Allt-Tair-Ffynnon Formation And Nod Glas Formation (Undifferentiated) Allt-Y-Clych Conglomerate Formation Allt-Y-Clych Conglomerate Member (Form Facies) Alluvial and Glacial Deposits (Undifferentiated) Alluvial And Glacial Drift (Undifferentiated) Alluvial Cone Alluvial Delta Alluvial Deposits And Peat Alluvial Deposits, Buried, Postglacial Estuarine-Marine [See Descriptions For Limitations Of Use] Alluvial Deposits, Postglacial, Terrestrial [See Descriptions For Limitations Of Use] Alluvial Fan Alluvial fan deposits Alluvial Fan Deposits 1 Alluvium Alluvium 1 Alluvium 2 Alluvium and Alluvial Fan Deposits (Undifferentiated) Alluvium And River Terrace Deposits Alluvium and River Terrace Deposits (Undifferentiated) Almscliff Grit [Obsolete Name And Code: Use WWG] Alne Glacial Lake Formation Alne Glaciolacustrine Formation Alne Hills Mudstone Bed Alness Member Alness Spiculite Formation Alness Spiculite Member Alpha Coal (North Wales) Alpha Rider Coal (North Wales) Alphington Breccia Formation Alphington Breccia Formation and Heavitree Breccia Formation (Undifferentiated) Alphington Breccia Member Alphington Breccias Alport Sandstone Alston Formation Alstonfield Limestone [Obsolete Name And Code: Within BLL] Altagoan Formation Alteen Shale Member Altena Group Alternata Limestone Alternata Limestone Formation Altmore Formation Altmore Schists [Obsolete Name And Code] Altnacealgach Alkali Feldspar-Syenite Altnaharra Psammite Formation Alton Coal (Leicester, Nottingham, Derby) Alton Marine Band Altonside Till Formation Alturlie Gravels Formation Alum Crag Grit Alum Rock Alum Shale Alum Shale (Of The Glasgow Area) Alum Shale Member Alum Shale Series Alveley Member Alves Beds Alves Formation Am Binnein Formation Am Binnein Sandstone Formation Am Binnein Sandstones Formation Amaliae Marine Band Ambaston Member Ambaston Terrace Deposits Amethyst Member Amlwch Beds Amman Marine Band Amman Marine Band [Local Name: Use VDMB] Amman Rider Coal (South Wales) Amman Rider Coal, Seven-Feet Coal And Yard Coal (Undifferentiated) (South Wales) Ammonite and Belemnite Bed Ammonites Planorbis Beds Amphibolite (Of Guernsey And Sark) Amphibolite And Calcsilicate-Rock Of Uncertain Origin Amphibolite Of Uncertain Origin Ampthill Clay Ampthill Clay Formation Ampthill Clay Formation And Kimmeridge Clay Formation (Undifferentiated) Ampthill Clay Formation And West Walton Formation (Undifferentiated) [Obsolete Code: Use WWAC] Amundsen Formation Amundsen Sub-Unit An Sithean Granite An Socach Quartzite Formation An Socach/Cairnwell Quartzite An Stac Semipelite and Psammite Formation An T-Sron Formation An Tamhanachd Member An Tamhanachd Member And Beannan Buidhe Member (Undifferentiated) An Torran Pelite Anabacia Limestones Ancaster Beds [Obsolete Name And Code] Ancestral Thames River Terrace Deposits (Undifferentiated) Ancholme Clay Group Ancholme Group Ancient Boundary Structure Ancient Building Ancient Burial Ground Ancient Cultivation Area Ancient Disturbed Ground Ancient Embankment Ancient Enclosure Ancient Fill Ancient Mineral Working Ancient Road Or Trackway Ancient Waste Tip Ancient Water Management Feature Ancliff Oolite Andesite (Uriconian Group) [Obsolete Name And Codepart Of UO] Andesite And Dacite Groups Andrew Sandstone unit Andrews Coal (Lothian) Andsell Mudstone Member Angulata Beds Angulata Clays Angulatum Clays [Obsolete Name And Code: Use BNBM] Angus Sand Angus Sands Anker Sand And Gravel Annaclare Group Annagher Coal (Dungannon) Annandale Sandstone Annandale Sandstone Bed Annandale Sandstone Beds Annandale Sandstone Member Annat Bay Formation Annie Formation Annie Sequence Anstruther Beds Anstruther Formation Anthracoceras Paucilobum Marine Band Anthracoceratites Marine Band Antrim Lava Group Anvil Limestone Aonach Beag Semipelite Formation Apestor Limestone Apestor Limestones [Obsolete Name And Code: See ECL] Appin Group Appin Group And Argyll Group (Undifferentiated) Appin Limestone Member Appin Phyllite And Limestone Formation Appin Quartzite Appin Quartzite Formation Appin Transition Formation Appinite Suite Appleby Group Appleby Group, Stewartry Group And Permian Sedimentary Rocks (Undifferentiated) Applecross Formation Applecross Subswarm Appledore Formation Applethwaite Beds Applethwaite Beds [Obsolete Name And Code: Partially Replaced By AP] Applethwaite Formation Applethwaite Group Applethwaite Member Applethwaite Series Appleton Ell Coal Appletree Limestone Appletree-Worth Sandstone Appletreeworth Volcanic Formation Approximately Equivalent To The Monograptus Leintwardinensis Shales. Aptian And Albian Rocks (Undifferentiated) Aqueduct Coal (North Wales) Aqueduct Grit [Obsolete Name And Code: See GS] Aqueduct Rock Aran Boulder Bed Member Aran Fawddwy Formation Aran Fawddwyf Formation Aran Volcanic Group Arbigland Beds Arbigland Group [Obsolete Name And Code: Use ARLM] Arbigland Group [Use ARLM] Arbigland Limestone Formation Arbigland Limestone Member Arbigland Member Arbikie Diamicton Member Arbriachan Intrusion Arbroath Formation Arbroath Sandstone Arbroath Sandstone Formation Arbroath Sandstone Member Arbroath Sandstones Arbuthnott Group [Obsolete Name And Code: See Arbuthnott-Garvock Group] Arbuthnott-Garvock Group Arbuthnott-Garvock Group And Strathmore Group (Undifferentiated) Arch Farm Sandstone Formation Archaean And Proterozoic Rocks (Undifferentiated) Archaean Rocks (Undifferentiated) Archaeological Excavation (Undivided) Archaeological Raised Ground (Undivided) Arched Mine Coal Archerbeck Beds Archerbeck Coal (Canonbie) Archerbeck Limestone Formation [Obsolete Name And Code: See AKB And TYLS] Archerbeck Ochre Bed Archiestown Pluton Arcow Formation Arctic Freshwater Bed Arctic Freshwater Bed [Duplicate: use FRESA] Ard Mheall Member (Western Layered Intrusion, Rum Layered Suite) [Obsolete Code: Use RLW3] Ardair Semipelite Formation Ardalanish Striped Formation Ardara Pluton Ardara Pluton Phase 1 Ardara Pluton Phase 2 Ardara Pluton Phase 3 Ardassie Limestone Member Ardclach Granite Pluton Ardclach Pluton Arden Limestone Arden Sandstone Arden Sandstone Formation Arden Sandstone Group Arden Sandstone Horizon Arden Sandstone Member Ardersier Silts Formation Ardgour Granite Gneiss Ardingly Sandstone Ardingly Sandstone Member Ardleigh Member Ardley Beds Ardley Beds And Bladon Beds Ardley Member Ardmillan Group Ardmillan Group (Lower Part) [Obsolete Name And Code: See AMN] Ardmillan Group (Upper Part) [Obsolete Name And Code: See AMN] Ardmillan Group, Albany Group And Barr Group (Undifferentiated) Ardmillan Series Ardmore Conglomerate Member Ardmore Formation Ardmore Grit Ardmore Grit Formation [Obsolete Name And Code: See ARDM, ARDG And ARDC] Ardmore Grit Member Ardnamona Sandstone Formation Ardnamurchan Central Complex Ardnamurchan Centre 1 Ardnamurchan Centre 2 Ardnamurchan Centre 3 Ardnamurchan Dyke-Swarm Ardnamurchan Point Gabbro Ring Intrusion Ardnandave Sandstone Formation Ardnave Phyllite And Greywacke Formation Ardnish Formation Ardnish Formation And Breakish Formation (Undifferentiated) Ardrishaig Phyllite Ardrishaig Phyllite Formation Ardrishaig Phyllites Ardross Lingula Band Ards Black Schist Ards Quartzite Ardscalpie Formation Ardtrea Sill Ardtun Beds Ardullie Silt Formation Ardvarney Limestone Member Ardverikie Till Formation Ardvreck Group Ardwell Beds, Middle Ardwell Bridge Basic Volcanic Member Ardwell Bridge Lavas Ardwell Farm Formation Ardwell Flags Ardwell Flags Formation (Topmost Beds) Ardwell Formation Ardwell Group Ardwell Subgroup Ardwick Formation Ardwick Group [Obsolete Name And Code: See WAWK] Ardwick Limestones Ardwick Marl [Obsolete Name And Code: See ETM] Ardwick Marl(s) Ardwick Marls Arenaceous Coal Formation [Obsolete Name And Code: Use PES] Arenaceous Limestone Arenaceous Series Arenig And Llanvirn Rocks (Undifferentiated) Arenig Ballantrae Volcanic Complex (Assumed To Be Part Of) Arenig Rocks (Undifferentiated) Arenig To Llandeilo Rocks (Undifferentiated) [Obsolete In Its Original Sense] Arfon Group Argill Marine Band Argill Marine Band [Local Name: Use LSMB] Argillaceous Series Argoed Limestone Member Argyle Drift Coal (Somerset) Argyll And Northern Highlands Granitic Suite Argyll Carbonate Member Argyll Group Arisdale Quartzite Member Arley And Exhall Sandstones Arley Coal (South Lancashire) Arley Conglomerate [Obsolete Name And Code: See ARSA] Arley Mine Arley Mine Coal Arley Sandstone Armadale Ball Coal (Central Coalfield) Armadale Ball Fireclay Armadale Coxrod Coal Armadale Main Coal Armadale Main Coal (Central Coalfield) Armadale Slatyband Ironstone Armadale Splint Coal Armadale Stinking Coal Armadale Upper Ball Coal Armadale Upper Cannel Coal (Central Coalfield) Armagh Group Armathwaite Dyke Armathwaite-Cleveland Dyke Armboth Dyke Armisdale Psammite Armsheugh Member Armsheugh Sand and Gravel Formation Arnage Pluton Arnbath Psammite Formation Arngrove Spiculite Member Arngrove Stone Arnhash Till Member Arnisdale Psammite Member Arniston Parrot Coal (Lothian) Arran Central Complex Arran Northern Granite (Inner Granite) Arran Northern Granite (Outer Granite) Arthur's Seat Volcanic Formation Arthur's Seat Volcanic Rocks Artificial Lagoon (Undivided) Artificial Pond Or Artificial Lake Artificially modified ground Artificially Subsided Ground Aruisg Psammite Formation Arun Formation Arun Member Arun River Terrace Deposits, 2 Member and Arun River Terrace Deposits, 3 Member, Undifferentiated Arun River Terrace Deposits, 3 Member and Arun River Terrace Deposits, 4 Member, Undifferentiated Arun River Terrace Deposits, 4 Member and Arun River Terrace Deposits, 5 Member, Undifferentiated Arun Terrace Deposits, 1 Member Arun Terrace Deposits, 2 Member Arun Terrace Deposits, 2a Member Arun Terrace Deposits, 2b Member Arun Terrace Deposits, 3 Member Arun Terrace Deposits, 4 Member Arun Terrace Deposits, 5 Member Arun Terrace Deposits, 6 Member Arun Terrace Deposits, 7 Member Arun Terrace Deposits, Facet 2a Arun Terrace Deposits, Facet 2b Arundel Sponge Beds Arvonian [Obsolete Name And Code: Use ARN] Arvonian Formation Aryleive Limestone Bed Asaphus Ash Formation Ascog Member Asfordby Volcanic Formation Ashbank Sandstone Member Ashbourne Gravel Ashclough Coal (South Lancashire) Ashclough Marine Band Ashclough Marine Band [Local Name: See MTMB] Ashclough Mine Ashclough Mine Coal Ashcombe Gravel Member Ashdown Beds Ashdown Beds (A) [Obsolete Code: Use ASD] Ashdown Beds (B) [Obsolete Code: Use ASD] Ashdown Formation Ashdown Sand Ashdown Sand(s) [Obsolete Name And Code: Use ASD] Ashfell Limestone Formation Ashfell Sandstone Ashfell Sandstone Formation Ashfield Coking Coal (Central Coalfield) Ashfield Rider Coal Ashford Beds Ashford Sand and Gravel Ashgate Coal (Nottingham) Ashgate Coal (South Yorkshire, Nottingham And Derby) Ashgate Leaf 1 (Ollerton) Ashgate Lower Leaf Coal (Derby) Ashgate Upper Leaf Coal (Derby) Ashgill Formation Ashgill Rocks (Undifferentiated) Ashgill Shale Formation Ashgill Shales Ashington Coal Ashington Coal (Northumberland) Ashington High Main Coal Ashington High Main Coal (Northumberland) [Obsolete Code: Use ASHN] Ashness Tuff Member Ashover Coal Ashover Grit Ashover Grit (Main Bed) Ashow Formation Ashow Group Ashprington Volcanic Formation Ashprington Volcanic Series Ashton Formation Ashton Great Coal (Bristol Area) Ashton Great Coal (South Lancashire) Ashton Great Mine Ashton Great Mine Coal Ashton Little Coal (Bristol Area) Ashton Mudstone Member Ashton Mudstone Member And Crackington Formation (Undifferentiated) Ashton Shale Member Ashton Shale Member (Of Crackington Formation) Ashton Top Coal (Bristol Area) Ashton Vale Marine Band Ashton Vale Marine Band [Local Name: Use SBMB] Ashton Vale Marineband Ashy Cleugh Limestone Askham Limestone Askham Limestone Member Assapol Group Assel Conglomerate Assel Conglomerate Member Assynt Glacigenic Formation Assynt Hornblende Microdiorite Swarm Assynt Meta-Olivine Gabbro Subswarm [Obsolete Name And Code: Use SMOG] Assynt Meta-Olivine Subswarm Assynt Metapicrite Subswarm [Obsolete Name And Code: Use BMP] Assynt Porphyritic Trachyte Swarm Assynt Till Formation Assynt Vogesite Swarm Asta Spilite Group Asta Spilitic Formation Asta Spilitic Formation [Obsolete Code: Use ASSP] Asta Spilitic Group Astarte Bed Astbury Formation Astbury Limestone Astbury Limestone Member Astbury Sandstone Member Astbury-Limestone-Shales Astell Coal (South Wales) Aston Beds Aston Coal (Oxfordshire) Aston Limestone Formation Aston Mudstone Formation Athais Till Formation Athelstan Oolite Formation Athelstaneford Sill Atherfield Clay Atherfield Clay 'Group' Atherfield Clay Formation Atherfield Clay Formation And Weald Clay Formation (Undifferentiated) Atherfield Clay Sensu Fitton (1847 P.296 Part Of Bed 3) Atherfield Clay Series Atherfield Group Atkinson & Fordingdale Ignimbrite Group Atlantean Supersuite Auch Gleann Psammite Formation Auchencar Burn Sandstone Member Auchencar Burn Sandstones Auchencar Burn Sandstones Formation Auchencar Lava Auchencar Lava Member Auchencar Sandstone Formation Auchencrow Burn Formation Auchencrow Burn Sandstone Formation Auchenheath Dross Coal Auchenheath Smithy Coal Auchenheath Wee Gas Coal Auchenhew Beds [Obsolete Name And Code: Use AHM] Auchenhew Mudstone Formation Auchensoul Bridge Mudstone Formation Auchensoul Limestone Formation Auchenwinsey Member Auchenwinsey Till Member Auchineden Lava Member Auchineden Lavas Auchingree Four Inch Coal Auchinlea Sandstone Auchivarie Psammite Formation Auchleuchries Sand and Gravel Formation Auchlyne Formation Auchmeddon Gravel Auchmeddon Gravel Formation Auchmeddon Gravel Member Auchmeddon Member Auchmithie Conglomerate Formation Auchmithie Conglomerate Member Auchnacloy Sandstone Member Auchnahillin Monzonite Auchnahyle Formation Auchtitench Formation Auchtitench Sandstone Formation Aughnacloy Sandstone Formation Aughnacloy Sandstone Member [Obsolete Name And Code: Use ACSF] Auglish Sandstone Member Auk Formation Auldearn (Park) Pluton Auldearn Granite Pluton Auldshields Blackband Auldshields Musselband (Central Coalfield) Auldthorns Formation Aulrothie Sandstone Member Aultbea Formation Aurora Formation Austwick Flags & Grits (King And Wilcockson, 1934) Austwick Flags And Grits [Obsolete Name And Code: Use AUF] Austwick Formation Austwick Formation And Arcow Formation (Undifferentiated) Aveley Member Aveline's Hole Limestone Avicula Ironstone Seam Avill Group [Obsolete Name And Code: Use ASS] Avill Slates And Sandstones Member Avoch Sandstone Member Avon Fifth Terrace [Deposits] Avon Fifth Terrace Deposits Avon First Terrace [Deposits] Avon Fourth Terrace [Deposits] Avon Group Avon Second Terrace [Deposits] Avon Third Terrace Deposits Avon Valley Formation Avoniel Anhydrite [Obsolete Name And Code] Avoniel Limestone Avonmouth No.1 Coal Avonmouth No.2 Coal Awre Formation Axe Valley Formation Aycliff Member Aydon Shell Bed Aylesbeare Group Aylesbeare Mudstone Formation Aylesbeare Mudstone Group Aylesbury Sand Aymestry Group Aymestry Limestone Formation Aymestry Rock Ayr Diamond Coal Ayr Ell Coal Ayr Extra Coal Ayr Forty Fathom Coal Ayr Hard Coal (Ayrshire) Ayr Jewel Coal (Ayrshire) Ayr Major Coal Ayr Thirty Six Fathom Coal Ayr Twenty Fathom Coal Ayr Twenty Three Fathom Coal Ayre Formation Ayre Lighthouse Formation Ayrshire Basanitic And Foiditic Plugs And Vents Ayrshire Bauxitic Clay Ayrshire Bauxitic Clay Formation Ayrshire Bauxitic Clay Member B-Bed Evaporite Babbacombe Slates Backet'S Copse Gravel Member Backfolds Palaeosol Bacton Green Till Member Bacton Group Bacton Member Bacton Member [Duplicate: use BACTO] Bad An Loin Quartzite Member Bad Na H-Achlaise Ultramafic Rocks Bad Step Tuff Bad Step Tuff Member Badanloch Granite Sheets Badbea Breccia Badbea Breccio-Conglomerate Member Badcall Meta-Clinopyroxene-Norite Subswarm Badcallian (Kylesku Group) [Obsolete Name And Code] Baddinsgill Mudstone Member Baddoch Burn Dolomite Baddoch Burn Limestone Member Baddoch Burn Limestone Member [Obsolete Code: Use BADL] Baddoch Burn Member [Obsolete Name And Code: See BADL] Baddoch Burn Pelite Formation Baddoch Quartzite Member Baddock Till Member Badenloch Pelite Member Badenoch Group Badentinan Sand Bed Badenyon Schist And Limestone Formation Badsworth Division Badsworth Member Badsworth Rock Baggy And Marwood Beds [Obsolete Name And Code: Use BYS] Baggy And Marwood Slates Baggy Beds Baggy Sandstones Formation Bagh Na H-Uamha Shale Baginton Sand Baginton Sand And Gravel Baginton Sand and Gravel Formation Baginton-Lillington Gravel Bagshot Beds [Obsolete Name And Code: Use BGS] Bagshot Beds and Bracklesham Beds (Undifferentiated) [Obsolete Name And Code] Bagshot Formation Bagshot Formation, Bracklesham Group, Barton Group, Becton Sand Formation And Chama Sand Formation (Undifferentiated) Bagshot Pebble Bed Bagshot Sands Bagworth Marine Band Bagworth Marine Band [Local Name: Use VDMB] Bail Hill Volcanic Group Bail Hill Volcanic Group [Obsolete Code: Use BAIL] Bailey Hill Formation Bailey Hill Formation [Duplicate Code: Use BAI] Bailey's Beds Baillieston Member Baillieston Till Formation Baily's Hill Flint Bain Valley Formation Bakewell Formation Bala [Obsolete Name And Code] Bala Limestone Bala Volcanic Series [Obsolete Name And Code] Balachuirn Sandstone Member Balbardie Blackband Ironstone Balbardie Gas Coal Balblair Intrusion Balby Formation Balchraggan Formation Balclatchie Beds Balclatchie Conglomerate [Obsolete Name And Code: Use BCH] Balclatchie Formation Balclatchie Formation, Ardwell Formation And Whitehouse Formation (Undifferentiated) Balclatchie Group Balclatchie Mudstones [Obsolete Name And Code: Use BCH] Balcomie Beds Balcomie Beds (Fife) Balcreuchan Group Balcreuchan Group (Correlated With, But Not Named) Balcreuchan Group, Part Of Arenig Volcanic Complex (Correlated With, But No Sp Balder Formation Baldernock Limestone Balderton Member Balderton Sand And Gravel Balderton Sand And Gravel Member Balfreish Microgranite Balgaverie Member Balgrochan Beds Baligill Limestone Member Balintober Intrusion Balintore Formation Ball Coal Ball Coal (Midlothian) Ballachulish Group Ballachulish Limestone Ballachulish Limestone Formation Ballachulish Pluton Ballachulish Slate Ballachulish Slate Formation Ballachulish Subgroup Ballachulish Subgroup And Blair Atholl Subgroup (Undifferentiated) Balladoole Formation Ballagan Beds [Obsolete Name And Code] Ballagan Cementstone Formation [Obsolete Name And Code: Use BGN] Ballagan Formation Ballagan Formation, Clyde Sandstone Formation And Strathclyde Group (Undifferentiated) Ballagan Formation, Clyde Sandstone Formation, Strathclyde Group And Clackmannan Group (Undifferentiated) Ballagan Formation, Clyde Sandstone Formation, Strathclyde Group and Lower Limestone Formation (Undifferentiated) Ballagh Limestone Member Ballanayre Slump Breccia Ballantrae Breccia Formation Ballantrae Complex Ballantrae Group [Obsolete Name And Code: Use BX] Ballantrae Igneous Complex Ballantrae Igneous Series Ballantrae Ophiolite Ballantrae Ophiolite Complex Ballasalla Beds Ballasalla Formation Ballater Pluton Ballaugh Formation Ballbrook Sandstone Member Balleich Lava Member Ballencleuch Law Granite Balleys Beds Ballinamallard Formation Ballinamallard Mudstone Formation Balling Coal Ballintoy Chalk Formation Ballintoy Chalk Member Balloch Clay Member Balloch Formation Balloch Member Balls Coal (South Wales) Ballyagen Formation Ballyalicock Conglomerate Formation Ballyalton Sill Ballyboley Halite Ballycastle Chalk Formation Ballycastle Chalk Member Ballycastle Pellet Chalk [Obsolete Name And Code] Ballycastle Sandstone Group Ballycastle White Limestone (Lower Part) Ballycastle White Limestone (Upper Part) Ballycraigy Plug [Obsolete Name And Code] Ballycultra Formation Ballydurnian Breccia Formation Ballygalley Head Plug Ballygawly Gneiss Ballygomartin Sill Ballygrant Formation Ballygrant Limestone Ballykelly Formation Ballylagan Member Ballyleighery Formation Ballyloughan Formation Ballymagarry Chalk Formation Ballymagarry Chalk Member Ballymaglin Shale Member Ballymartin Member Ballymastocker Formation Ballymoney Formation Ballynahone Micrite Formation Ballyness Formation Ballyrainey Sill Ballyreagh Conglomerate Formation Ballyshannon Limestone Formation Ballysteen Formation Ballytober Sandstone Formation Ballytrea Formation Ballyvoy Coals Ballyvoy Sandstone Formation Balmae Grits Balmakeith Till Member Balmeanach Silt Formation Balmoral Index Coal Balmoral Sandstone unit Balmoral Tuffite unit Balmore Marine Band Balnacraig Metabasite Member Balnagown Group Balnakiel Formation Balnakiel Group Bamburgh Formation Bampton Conglomerate Bampton Limestone Formation Bampton Limestone Formation [Duplicate Code: Use BPLM] Bampton Limestone Group Bampton Limestones Group Bampton Member Banbury Coal (North Staffordshire) Banbury Rock Banchory Till Formation Banded Group Banded Group Within Blair Atholl Subgroup Banded Schist Within Blair Atholl Subgroup Banded Series Within Pale Group Of Blair Atholl Series Bandy In Northumberland Banffshire Coast and Caithness (Albion) Glacigenic Subgroup Banffshire Coast and Caithness Glacigenic Subgroup Banffshire Coast Drift Group Banffshire Coast Glacigenic Group Bangley Dyke Bangley Member Bangley Trachytic Member Bangor Formation Banham Beds Banham Member Banjaard Formation Bank Coal Bank deposits Bank Farm Coal (Wyre Forest) Bank Farm Sand and Gravel Bank Moor Limestone Bankfield East Beds Bankhead Marine Band Bankhouses Limestone Banknock Jewel Coal Banknock Lower Drumgray Coal Banknock Main Coal Banknock Shale Coal Banknock Splint Coal Banknock Upper Drumgray Coal Banks Formation Banks Group Banks Sequence Banks Subsequence Bannagher Sandstone Formation Bannisdale Formation Bannisdale Slates [Obsolete Name And Code: Use BND] Bannock Coal (Cumbria) Bannockburn Lower Main Coal Bannockburn Main Coal Bannockburn Steam Coal Bannockburn Upper Main Coal Bantam Coal (Somerset) Banton [Main] Coal (Glasgow-Airdrie) Banton Blackband Coal Banton Blackband Ironstone Banton Clayband Ironstone Banton Main Coal Banton Rider Coal Banwy Member Baoileig Sill (South Arran) Baranailt Limestone Member Barbae Grits Barcelona Coal Bardahessiagh Formation Bardon 'Good Rock' Bardon Breccia Bardon Hill Volcanic Complex Bardsley Loom Formation Bardsley Rock Bare Coal (Warwickshire) Baren Red Group (Somerset) [Obsolete entry, use BRR] Bargan Coal (South Lancashire) Bargany Formation [Obsolete Name And Code: Use (Part Of) DYF] Bargate Beds Bargate Formation Bargate Member Bargate Member Of The Sandgate Formation Bargate Sandstone Member Barham Sands And Gravels Bark Butts Silts Member Barkisland Flags Barkley Breccia Formation Barmouth Formation Barn Rock Member Barn Scar Sand And Silt Member Barnby Clays Barnby Member Barncraig Coal (Fife) Barncroft Beck Beds Barncroft Beck Member [Obsolete entry, use BACB] Barneil Member Barnes High Sandstone Member Barnesmore Pluton Barnesmore Pluton (Phase 2) Barnesmore Pluton (Phase 3) Barness East Limestone Barney's Cut Coal (Northumberland) Barney's Cut Sandstone Barnham Silt And Clay Member Barns Ness East Limestone Barns Ness Limestone [Obsolete Name And Code: Use MIHO] Barnsley Coal Barnsley Coal (West And South Yorkshire) Barnsley Rider Coal (West And South Yorkshire) Barnsley Rock Barnstone Member Barnstone Member And Barnby Member (Undifferentiated) Barnt Green Volcanic Formation Barnt Green Volcanic Series Barnwell Abbey Member Barnwell Station Member Barnyards Silt Formation Baron Hill Beds Baron Hill Formation Baron Hill Rocks [Obsolete Code: Use BAH] Baronwood Member Baronwood Sand and Gravel Formation Barony Glen Formation Barr Beacon Beds [Obsolete Name And Code: Use HPBR] Barr Church Andesite Member Barr Group Barr Limestone Barr Limestone Formation Barr Series Barra Formation Barra Isles Dyke Swarm Barracados Cherts Barrack Hill Andesite Member Barracks Ash Barracks Limestone Barras Conglomerate Formation Barras Conglomerate Member Barras Nose Beds Barras Nose Formation Barrasford Limestone Barren Coal Measures (Upper) Barren Flagstones Barren Group Barren Measures Barren Measures (Now Group) Barren Measures Group [Obsolete Name And Code: See WAWK] Barren Red Formation (Somerset) [Obsolete entry, use BRR] Barren Red Group Barren Red Measures Barren Red Member (Somerset) Barrhead Grit Barrhead Main Coal Barrhill Group Barriedale Flagstones Barrington Beds Barrington Member Barrmill Dyke Barrock Top Limestone Barron's Pike Sandstone Barrow Hill Basaltic Vent Barrow Terrace Deposits Barrow Tuff Member Barroway Drove Beds Barrowmouth Mudstone Formation Barrule Formation Barrule Slates Barrule Slates (Manx Slates) [Obsolete Name And Code: See BRUL] Barrule Slates And Slieau Managh Slates Barry Harbour Limestone Formation Barshaw Sill Barton Beds Barton Clay Barton Clay Formation Barton Formation Barton Group Barton Group, Bracklesham Group And Bagshot Formation (Undifferentiated) Barton Limestone Barton Limestone Member Barton Member Barton Pebble Bed [Obsolete Name And Code] Barton Sand Barton Sand Formation Barytes Mine Conglomerate Barytes Mine Conglomerate Member Basal Andesite Sill-Complex Basal Beds Basal Beds Formation (Cumbria) Basal Breccia Basal Breccia And Sandstone Basal Cementstones Basal Clastics Basal Clastics Member Basal Conglomerate Basal Grampian Division Basal Gravel Basal Gravels Basal Green Beds (South Wales) Basal Grit Basal Grit (Millstone Grit Of South Wales) [Obsolete Name And Code: Use TWR] Basal Grit (Millstone Grit) Basal Grits Basal Grits Group Basal Group Basal Hydraulic Limestone Member Basal Member (Canna Lava Formation) Basal Member (Eigg Lava Formation) Basal Oil Shale Basal Part Of Whitehills Group Basal Pelite Formation Basal Permian Breccia (South West) Basal Permian Breccia [Obsolete Name And Code: See PBB] Basal Permian Sands Basal Permian Sands Formation Basal Permian Sandstone Basal Permian Yellow Sands Basal Quartz Sandstone Formation Basal Quartzite Basal Quartzite Member Basal Sand Basal Sand And Gravel Basal Sand Bed Basal Sandstone Basal Sandstone Unit Basal Shales Basal Shell Bed Basal Unit Of Sandend Group Basalanhydrit Formation Base Bed Member Basement Bed Basement Beds Basement Beds (Group) [Obsolete Name And Code Use: MASA] Basement Beds (North Wales) Basement Beds (North West) [Obsolete Name And Code Use: MASA] Basement Beds (Northern Pennines) [Obsolete Name And Code Use: MASA] Basement Beds (Of Dudley) Basement Beds Formation [Obsolete Name And Code: See Supplementary Information] Basement Breccia (Shetland) Basement Conglomerate Basement Conglomerate (Anglesey) [Obsolete Name And Code: Use LGY] Basement Conglomerate (North West) Basement Formation Basement Formation (Pars) Basement Or Bearing Grit [Obsolete Name And Code: See BGRT] Basement Pebble Bed (Of The Upper Bagshot Beds) Basement Sands Of The Upper Glauconite Beds Basic Tuff (Lydol Hole) [Part Of UO] Basic Tuffs With Basalts (Uriconian Group) [Obsolete Name And Code: Part Of UO] Basic Volcanic Group Basin peat Basket Shell Bed Baslow Coal (Derbyshire) Bass Coal (South Staffordshire) Bass Rock Plug Bassenthwaite Diorite Intrusions Bassey Mine Bassey Mine Coal Bassey Mine Coal (Lancashire) Bassey Mine Coal (North Staffordshire) Bassingfield Sand And Gravel Bassingfield Sand And Gravel Member Bassingham Fen Member Bassy Coal Bassy Coal (South Lancashire) Bassy Mine Bassy Mine Coal Bastard Limestone Bastion Steps Beds Bastions Coal (South Lancashire) Baston Burn Group Baston Burn Lava Member Batavier Formation Batch Volcanic Beds Batch Volcanic Member Batch Volcanic Rocks Batch Volcanics [Obsolete Code: Use BV] Batchie (Blackband) Ironstone Batchie Blackband Ironstone Batchie Coal (Central Coalfield) Bath Freestone Bath Lodge Coal (Ballycastle, Northern Ireland) Bath Lodge Lava Formation Bath Oolite Bath Oolite Member Bath Oolite Member and Corsham Limestone Formation (Undifferentiated) Bath Stone And Lower Rags Bathampton Down Member Bathampton Member Bathgate Group Bathgate Hills Volcanic Formation Bathgate Jewel Coal Bathgate Lavas Bathgate Volcanic Formation Bathonian And Callovian Rocks (Undifferentiated) Bathonian Rocks (Undifferentiated) Batty Mine Coal (North Staffordshire) Baulking Sand Member Bav3: Bristol Avon River Terrace Deposits, 3 Member Bay Coal Bay Marine Band [Local Name: Use CAMB] Bay Member Bay Of Stoer Formation Bay Sandstone Member Bay Vein Bays Leap Coal (Northumberland And Durham) Bayston-Oakswood Formation Bayston-Oakswood Group Bayston-Oakwood Formation [Obsolete Code: Use BAGP] Beach and Tidal Flat Deposits (Undifferentiated) Beach deposits Beach dune sand Beach Rock Beachy Head Beds Beachy Head Marls Beachy Head Sponge Beds Beacon Hill Acid Group Beacon Hill Flags Beacon Hill Formation Beacon Hill Sand And Gravel Member Beacon Hill Tuff Formation Beacon Hill Volcanic Formation Beacon Hill Volcanic Group Beacon Limestone Formation Beacon Tuff Member Beacon Tuffs Member Beaconsfield Flags Beaconsfield Gravel Beaconsfield Member Beadnell Coal (Northumberland) Bealbury Formation Bealesmill Sandstone Formation Bealsmill Formation Bealsmill Sandstone Formation Beannach Metapicrite Subswarm Beannan Buidhe Member Bearing Grit Bearreraig Sandstone Formation Bearreraig Sandstone Series Bearsmouth Or Thorneyburn Coal Bearstone Sandstones [Obsolete Name And Code: Use HEY] Beatrice Formation Beauly Member Beauly Silt Formation Beaumont Coal Beaumont Coal (Northumberland) Bebside Bank Seam (D/De1) Beccles Formation Beck Bottom Stone Coal (West Yorkshire) Beck Wood Tuff Member Beckford Terrace Deposits Beckingham Member Becklees Sandstone Formation Beckley Sand Member Beckley Sand, Temple Cowley And Arngrove Spiculite Members Beckley Sands Becton Bunny Member Becton Sand Becton Sand Formation Becton Sand Formation And Chama Sand Formation (Undifferentiated) Bed 1 Bed 3 Bed 3 (Lower Part Of Crovie Group) Bed 3 (Upper Part) Of Crovie Group Bed 4 Bed 4 Oolite Group Bed 6 (part of Marker Beds) Bed A and lower part of Bed B Bed A, Excluding Upper Part Bed B Bed C Bed D Bed F Bedchester Sands Member Bedded Agglomerate Of Greenan Castle Bedded Pyroclastic Formation Bedhampton Marls (One) Bedhampton Marls (Three) Bedhampton Marls (Two) Bedlam Gill Coal (Cumbria) Bedminster Great Coal (Bristol Area) Bedminster Little Coal (Bristol Area) Bedminster Toad Coal (Bristol Area) Bedminster Top Coal (Bristol Area) Bedrock (Pre-Carboniferous Rocks) At Or Near Surface [See Descriptions For Limitations Of Use] Bedrock (Sedimentary Cover) At Or Near Surface [See Descriptions For Limitations Of Use] Bedrock At Or Near Surface [See Descriptions For Limitations Of Use] Bedrock Geology Not Mapped [For Digital Map Use Only] Bedrock Theme Not Mapped [For Digital Map Use Only] Bedruthan Formation Bedruthan Slates Beds 1 And 2 In Crovie Group Beds 5 And 6 Beds At A, A1 And Lower Part Of B Beds At C Beds At D To E Beds At D To H Beds At F Beds At G And H Beds At J To M Beds C To H Beds C, E Beds D To E Beds D To H Beds G And H Beds Included In 'Millstone Grit' Beds Of 'Findon Group' Bee Coal Bee Low Formation Bee Low Group Bee Low Limestone Formation Bee Low Limestones Bee Low Limestones Formation (Apron-Reef) Bee Low Limestones Formation (Knoll-Reef) Beechcliff Sandstone Beechwood Conglomerate Bed Beechwood Conglomerate Bed [Obsolete code] Beeding Beds Beeding Flints Beeding Hardgrounds Beeding Marl Beefie Coal (Lothian) Beenham Grange Gravel Beenham Grange Gravel Member Beenham Stocks Gravel Beenham Stocks Gravel Member Beer Head Limestone Formation Bees Nest Member Beeson Grits Formation Beeston Chalk Member Beeston Coal (West Yorkshire) Beeston Regis Formation Beeston Rider Coal (West Yorkshire) Beeston River Deposits Beeston River Terrace Deposits. Beeston Sand And Gravel Beeston Sand And Gravel Member Beeston Terrace Beetle Bed Beggar Coal (Midlothian) Bein Nan Coireag Conglomerate Beinn A'Chaisteil Quartzite Formation Beinn A'Ghlo Graphitic Schist Beinn A'Ghlo Quartzite Beinn A'Ghlo Quartzite Formation Beinn A'Ghlo Schist Beinn A'Ghlo Transition Formation Beinn A'Ghlo Transition Formation And Glen Clunie Graphitic Schist Formation (Undifferentiated) Beinn Airein-An Stac Member Beinn An Dothaidh Formation Beinn An Dubhaich Granite (Skye Eastern Red Hills Centre: Phase 3) Beinn An Dubhaich Limestone Beinn An Leathaid Granodiorite Intrusion Beinn An Tuim Striped Formation Beinn an Uain Till Formation Beinn Bheula Schist Beinn Bheula Schist Formation Beinn Bhreac Member Beinn Bhreac Psammite Beinn Bhreac Psammite Formation Beinn Buidhe Older Quartz-Gabbro Intrusion Beinn Chaisgidle (Centre 2) Suite Beinn Churalain Quartzite Beinn Deag Mhor Granite (Western Red Hills Centre: Phase 5) Beinn Donn Quartzite Formation Beinn Dorain Semipelite Formation Beinn Edra Formation Beinn Edra Group Beinn Gaire Psammite Formation Beinn Iadain Mudstone Formation Beinn Iaruinn Quartzite Formation Beinn Leamhain Psammite Formation Beinn Mheadhoin Pebbly Psammite Formation Beinn Na Cro Gabbro (Skye Eastern Red Hills Centre) Beinn Na Cro Granite (Skye Eastern Red Hills Centre: Phase 2) Beinn na Leac Sandstone Member Beinn Na Seamraig Formation Beinn Na Seamraig Grits Beinn Nan Ord Gabbro Ring-Dyke Beinn Totaig Formation Beinn Udlaidh Quartzite Formation Beith Lava Member Beith Lavas Belah Dolomite Beldin Gill Ganister Beldin Gill Ganister Formation Beldorney Pelite Formation Belemnite Beds Belemnite Marl Member Belemnite Marls Belemnite Sands Member Belemnitiferous And Micaceous Marls (Upper Part) Belfast Group Belfast Harbour Evaporite Formation Belfast Marls Formation Belfast Marls Member Belhaven Point Vent Belhelvie Basic Intrusion Belhelvie Pluton Bell Crags Breccia Member Bell Crags Member Bell Pit Bell Pit [Obsolete Code Use DMBP] Bell's Hill And Howden Burn Group Bell's Hill And Howden Burn Volcanic Formation Bell's Hill Volcanic Member Bellavally Formation Belle Tout Beds Belle Tout Marls (One) Belle Tout Marls (Three) Belle Tout Marls (Two) Bellfield Conglomerate Bed Belling Limestone Bellingham Coal Bellingham Coal (Northumberland) Bellman Limestone Member Bellmoor Member Bellochantuy Bay Formation Bellringer Coal (North Staffordshire) Bellscamphie Till Formation Bellshill Clay Member Bellshill Formation Bellside Coal (Glasgow; Central Coalfield) Bellside Ironstone (Central Coalfield) Bellyhack Quartzite Member Belper Grit Belper Lawn Coal (Leicester, Nottingham, Derby) Belsay Dene Coal (Northumberland) Belsay Dene Limestone Beltiboy Coal (Dungannon) Belton Brae Vent Belton Grain Vein Belton Sand And Gravel Belvoir Limestone Formation Bembridge Beds Bembridge Limestone Bembridge Limestone Formation Bembridge Marls Bembridge Marls Member Bembridge Oyster Beds Bembridge Raised Beach Bembridge Raised Beach Member Ben A Caillich Granite (Skye Eastern Red Hills: Phase 5) Ben Aian Quartzite Ben Aigan Quartzite [Obsolete Name And Code: Use BAQU] Ben Aigan Quartzite Member Ben Bowie Lava Member Ben Challum Quartzite Formation Ben Dorrery Conglomerate Member Ben Dubhain Breccia And Conglomerate Ben Eagach Schist [Obsolete Name And Code: Use BESC] Ben Eagach Schist Formation Ben Griam Conglomerate Member Ben Griam Lower Arkose [Obsolete Name And Code: Use BGCON] Ben Griam Lower Conglomerate [Obsolete Name And Code: Use BGCON] Ben Griam Upper Arkose [Obsolete Name And Code: Use BGCON] Ben Griam Upper Conglomerate [Obsolete Name And Code: Use BGCON] Ben Hiant Breccia Member Ben Hiant Intrusion Ben Hiant Pitchstone Sheet-Swarm Ben Hiant Porphyritic Dolerite Intrusion Ben Hope Sill Suite Ben Killilan Psammite Member Ben Lawers Schist Ben Lawers Schist [Obsolete Name And Code: Use BLAS] Ben Lawers Schist Formation Ben Ledi Grit Formation Ben Ledi Grits Ben Loyal Intrusion Ben Lui Schist [Obsolete Name And Code: Use BLUS] Ben Lui Schist Formation Ben Lundie Formation Ben More Lava Formation Ben Nevis Complex Ben Nevis Complex (Inner Granite) Ben Nevis Complex (Marginal Intrusion) (Pyroxene Diorite To Granodiorite) Ben Nevis Complex (Marginal Intrusion) (Quartz Diorite) Ben Nevis Complex (Outer Granite) Ben Nevis Dyke Swarm Ben Nevis Volcanic Formation Ben Nevis Volcanic Series [Obsolete Name And Code: See BNVO] Ben Rinnes Pluton Ben Rinnes Pluton (Phase 1) Ben Rinnes Pluton (Phase 2) Ben Rinnes Pluton (Phase 3) Ben Rinnes Pluton (Phase 4) Ben Stumanadh Intrusion Ben Suardal Limestone Ben Suardal Member Ben Vuirich Pluton Ben Wyvis Pelite Ben Wyvis Pelite Formation Ben Wyvis Pelitic Schist Ben Wyvis Psammite Benan Conglomerate Formation Benarth Grits And Flags Benbulben Shale Formation Benburb Group Benburb Lignite Benburb Mudstone Member Bench Coal Bench Coal (Warwickshire) Bench Thin Coal (Warwickshire) Benches Coal (South Staffordshire) Bencliff Grit Bencliff Grit Member Bencliff Grit Series Bencroy Shale Formation Benglog Volcanic Formation Benhar Coal Benholm Clay Formation Benigarth Mica-Schist (?Formation) Bennachie Pluton Bennan Intrusion (South Arran) Bennane Lea Breccia Member Benscliffe Agglomerate Benscliffe Breccia Member Benscliffe Breccia Member [Obsolete Code: Use CMBA] Bensham Bensham Coal (Northumberland) Benthall Beds Benthall Member Bentinck Coal (Northumberland) Bentleyford Shales Formation Benton Series Benton Volcanic Group Benton Volcanic Series Bents Fireclay Beoch Musselband Beoil Banded Schist Beoil Quartzite Beoil Quartzite Formation Beoil Schist Beoil Schist Formation Beoil Schist Formation And Meall Dubh Striped Pelite Formation (Undifferentiated) Beragh Granite Beresford Seam Berkshire Oolite "Series" [Obsolete Name And Code: See BYSA] Berkshire Oolite Series Berkshire Oolite Series And Osmington Oolite Series Berllan Beds Berllan Formation Bernisk Glen Conglomerate Formation [Obsolete Name And Code] Berriedale Conglomerate Berriedale Flagstone Formation Berriedale Sandstone Formation Berriedale Sandstone Group [Obsolete Name And Code: Use BDSA] Berriedale Sandstones Berry Head Member Berry Member Berry Slade Formation Berryhills Coal (Glasgow Area; Central Coalfield) Berryhills Limestone Berryley And Hardslacks Members Of Camp Fauld Formation Of Bowen (1999) Berryley Peat Bed Berw Shear Zone Berwick Limestone Beryl Formation Bessygill Limestone Best Coal (Coalbrookdale) Beta Coal (North Wales) Beta Rider Coal (North Wales) Better Bed Band Coal (West Yorkshire) Better Bed Coal (West And South Yorkshire) Better Bed Fireclay Bettisfield Formation [Obsolete Name And Code: Within PCM] Betton Beds Betton Member Betton Shale Formation Betton Shale Formation [Duplicate Code: Use BET] Betton Shale Formation And Meadowtown Formation (Undifferentiated) Bettshanger L Coal (Kent) Bettws Four Feet Coal (South Wales) Bettws Mill Tuff Member Bettws Mudstone Formation Bettyhill Formation Bettyhill Suite Beul Lama Sgorr Member Beverkae Limestone Bewcastle Beds Bewcastle Member Bewerley Shales Beyrichoceras Hodderense Bed Bharradail Phyllite Member Bheinn Bhreac Member Bickerton Moraines Formation [Obsolete Name And Code: Use ESKRM] Biddenham Member Bidean Nam Bian Andesite Member Bideford Formation Bideford Group Bielby Peat Bed Bielby Sand Member Bifidus Beds Bifidus Shales Bifidus Slate Formation Bifidus Slate Formation And Murchisoni Beds [Undifferentiated] Bifidus Slates Big Coal (Somerset) Big Coal (South Wales) Big Coal [In Part] Big Coal [South Wales Coalfield] Big Drum Coal (Lanarkshire) Big Flint Coal (Coalbrookdale) Big Flint Rock Big Mine Coal Big Rider Coal (South Wales) Big Rock Coal (South Wales) Big Smut Coal (Goyt Trough) Big Vein Big Vein Coal (South Wales) Biggar Volcanic Formation Bigholms Burn Peat Bed Bighouse Formation Bighouse Limestone Member Bighouse Sandstone Formation [Obsolete Name And Code: See BIGH] Bighouse Sandstone Formation And Lower Part Of Sandside Sandstone Formation Biglees Hill Sill Bilinguites Bilinguis Marine Band [1 Of 3] Bilinguites Bilinguis Marine Band [2 Of 3] Bilinguites Bilinguis Marine Band [3 Of 3] Bilinguites Bilinguis Marine Band [Obsolete Code: Use R2B1] Bilinguites Bilinguis Marine Band [Obsolete Code: Use R2B2] Bilinguites Bilinguis Marine Band [Obsolete Code: Use R2B3] Bilinguites Bilinguis Marine Band [See Also: R2B1 R2B2 R2B3] Bilinguites Eometabilinguis Marine Band Bilinguites Eometabilinguis Marine Band [Obsolete Code: Use R2B4] Bilinguites Gracilis Marine Band Bilinguites Gracilis Marine Band [Obsolete Code: Use R2A1] Bilinguites Metabilinguis Marine Band Bilinguites Metabilinguis Marine Band [Obsolete Code: Use R2B5] Bilinguites Superbilinguis Marine Band Bilinguites Superbilinguis Marine Band [Obsolete Code: Use R2C1] Billingham Anhydrite Formation Billy Coal (South Staffordshire) Bilsdean Sandstone Bilston Burn Limestone [Obsolete Name And Code: Use SHLS] Bilston Rock (South Staffordshire) Bilton Coal Bilton Coal Beds Bin Coal (South Lancashire) Bin Down Formation Bin Mine Bin Mine Coal Bin Mountain Sandstone Formation Bincombe Mudstone Member Bindon Sandstone Member Binds Stone (South Staffordshire) Bingley Bog Formation Binnein Quartzite Binnein Quartzite Member Binnein Schist Binnein Schist Member Binnend Limestone Binnend Sandstone Binnend Sandstone Member Binny Craig Sill Binny Sandstone Binsey Formation [Obsolete Name And Code: Undifferentiated Part Of EVG] Bioclastic sand deposits Biological deposits Biotite-Quartz-Gneiss Of Sark Birch Sandstone Member Birchenwood Coal Birchlaw Limestone Birchwood Semipelite Formation Birdlip Limestone Formation Birdoswald Limestone Group [Obsolete Name And Code: Use TYLS] Birdsall Calcareous Grit Member Birdshill Limestone Birdwell Rock Birgidale Formation Birk Fell Group Birk Riggs Formation Birkby Fell Andesite Member Birkby Fell Member Birkdale Limestone Birkenhead Sandstone Formation Birker Fell Andesite Formation Birker Fell Andesite Group Birkfield Limestone Birkhill Shale Formation Birkhill Shales Birky Cleugh Limestone Birnam Grit [Obsolete Name And Code: Use BSAG] Birnam Slate [Obsolete Name And Code: Use BSAG] Birnam Slate And Grit Formation Birnbeck Limestone Formation [Obsolete Name And Code: Use HTL] Birnie Gravel Formation Birrenswark Lavas [Obsolete Name And Code: Use BIRV] Birrenswark Volcanic Formation Birrenswark Volcanic Group Birstall Member Birstall Rock Birstall Sand And Gravel Birstall Terrace Birtley Limestone Bisat Group Biscathorpe Sand And Gravel Bishop's Frome Limestone Member Bishop's Quarry Beds Bishop's Quarry Limestone Formation [Obsolete Name And Code: Use CFML] Bishopbriggs Sandstone Bishopston Formation Bishopston Mudstone Formation Bittadon Tuff Bed Bitter Beck Formation Bla-Bheinn Member Black (Aberdo) Limestone [Obsolete Name And Code: Use TLB] Black And White Coal (South Lancashire) Black And White Mine Coal Black And White Mines Black Band Coal (North Staffordshire) Black Band Coal (South Yorkshire) Black Band Formation Black Band Ironstone Member Black Band Member Black Bass Coal (North Staffordshire) Black Bed Coal (North Wales) Black Bed Coal (West Yorkshire) Black Bed Ironstone (West Yorkshire) Black Cliff Coal (Milford, South Wales) Black Cliff Vein Black Coal (Bristol Area) Black Coal (South Lancashire) Black Coal (South Wales) Black Coal [South Wales Coalfield] Black Cock Beds Black Cock Formation Black Down Sandstone Group Black Hill Intrusion Black Hill Laccolith Black Isle Sandstone Group Black Law Plug (Greenock) Black Law Vent And Plug (Jedburgh) Black Lias Black Limestone Black Limestone (Isle Of Man) Black Limestones And Shales Black Marl Black Metal Coal (Cumbria) Black Metals Black Metals Marine Band Black Metals Marine Band [Local Name: See HTMB] Black Metals Member Black Mine Black Mine Coal Black Mount Group Black Mount Lava Member Black Mountain Shale Member Black Neuk Member Black Nore Beds Black Nore Sandstone (Jurassic) Black Nore Sandstone Formation Black Park Gravel Member Black Rake Coal (Nottingham) Black Rock Dolomite Black Rock Dolomite Formation [Obsolete Name And Code: See BRL] Black Rock Group [Obsolete Name And Code: Use BRL] Black Rock Limestone Black Rock Limestone Formation [Obsolete entry, use BRL] Black Rock Limestone Subgroup Black Rock Subgroup And Gully Oolite Formation (Undifferentiated) Black Rocks Sill Black Schist and Chert Black Shale And Chert Black Shale And Chert "Series" (A) [Obsolete Name And Code] Black Shale And Chert "Series" (B) [Obsolete Name And Code] Black Shale and Margie Grit [Obsolete Name And Code: Use MARG] Black Shales Black Shales And Conglomerates Black Shales Of Malvern Black Shelly Boulder Clay Black Shelly Till Black Slate And Chert Black Slates Of Dolwyddelan [Obsolete Name And Code: Use NOG] Black Slates Of Skiddaw Black Stockarton Moor Complex Black Stockarton Moor Subvolcanic Complex Black Top Coal Black Vein Coal (South Wales) Black Ven Beds Black Ven Marl Member Black Ven Marls Blackband Coal (New Cumnock) Blackband Coal (South Wales) Blackband Group Blackband Lingula Band Blackband Marine Band Blackberry Bank Formation Blackbrook Beds Blackbrook Formation Blackbrook Group Blackbrook Reservoir Formation Blackbrook Series Blackbyre Coal (Glasgow; Central Coalfield) Blackbyre Limestone Blackchapel Coal (Lothian) Blackcleugh Limestone Blackclose Coal Blackclose Coal (Rothbury Area) [Obsolete Name And Code: Use MOOR] Blackcraig Formation Blackcraig Formation And Galdenoch Formation (Undifferentiated) Blackford Hill Member Blackhall Colliery Formation Blackhall Estheria Band Blackhall Formation [Obsolete Name] Blackhall Limestone Blackhall Member Blackhall Till Formation Blackheath Beds Blackheath Member Blackheath Pebble Member Blackhill Coal (Northumberland) Blackhills Sand and Gravel Formation Blackmine Coal (North Staffordshire) Blackmires Limestone Blacko Marine Band Blackpool Mudstone Member Blackrock Grit Formation Blackrock Marl Blackshale And Ashgate Coal (Vale Of Belvoir) Blackshale Coal (South Yorkshire, Nottingham And Derby) Blackshale Lower Leaf Coal (Derby) Blackshale Sill Blackshale Upper Leaf Coal (Derby) Blackshale/Ashgate Group (Of Coals) (Nottingham) Blackslee Dyke [Obsolete Name And Code] Blackstokes Limestone Formation Blackstone (Jurassic) Blackstone (Shropshire) Blackstone Coal (Coalbrookdale) Blackstone Coal (Stoke) Blackstone Edge Sandstone Blackstone Marine Band Blackstone Marine Band [Local Name: See MTMB] Blackstones Band Igneous Complex Blacktongue Coal Blackwater Formation Blackwater Hollow Gravel Member Blackwater Limestone Formation Blackwater Pluton Blackwood Beds [Obsolete Name And Code: Use (Part Of) DYF] Bladon Beds And Kemble Beds Bladon Member Blae Pot Coal Blae Pot Limestone Blaeberry Coal Blaeberry Formation Blaen Eidda Member [Obsolete Name And Code: Part Of CEI] Blaen Myherin Mudstones Formation Blaen Onnen Oolite [Obsolete Code: Use BLO] Blaen Onnen Oolite Formation Blaen Y Cwm Beds Blaen-Y-Cwm Shale Formation Blaen-Y-Glyn Formation Blaguegate Yard Coal Blair Atholl Dark Limestone And Dark Schist Blair Atholl Dark Limestone And Dark Schist Formation Blair Atholl Series Blair Atholl Subgroup Blair Flags And Shales Blair Hill Tuff Member Blair Shale Formation Blair Shales Blairdaff Moraine Formation Blairfindy Limestone Member Blairgowrie Sandstone Formation [Obsolete Name And Code: See SCN] Blairhall Blackband Ironstone Blairhall Main Coal Blairhall Main Coal (Cowdenbeath) Blairhall Main Coal (Fife) Blake Brow Breccia Member Blake Brow Member Blakefell "Mudstone" Blakeney Formation Blakeney Valleys Formation Bland Coal (South Lancashire) Blandford Chalk Member [Obsolete Name And Code: See SECK And NCK] Blane Water Formation Blane Water Silt Formation Blanket bog peat Blanket head Blanket Head (Regolith) Blargie Quartzite Member Blatchford Sand Blaven Granite (Srath Na Creitheach Centre) Blbc Blocking Coal (West Yorkshire) Blea Wyke Beds Blea Wyke Sands Blea Wyke Sandstone Formation Blea Wyke Series Bleadon Member Bleak Down Gravel Member Bleawath Formation Bleawath Tuff Formation Blelham Peat Formation Blenfire Coal (South Lancashire) Blenfire Mine Blenfire Mine Coal Blenfire Rock Blengdale Glacigenic Formation Blengdale Tuff Formation Blidworth And Top Hard Coal (Vale Of Belvoir) Blidworth Coal (Nottingham) Bligh Bank Formation Blind Beck Sandstone Formation Blind Beck Sandstone Member Blind Cove Member Blind Cove Sandstone Member Blind Rock Dyke Blisco Formation Blisco Member Blisco Sandstone Member Blisworth Clay Formation Blisworth Clay Member Blisworth Limestone Blisworth Limestone Formation Block Coal (South Derbyshire) Blockfield Blocking Bed Coal Blocking Coal (West Yorkshire) Blocking Rider Coal (West Yorkshire) Bloody Bay Sandstone Blowgill Member Blown sand Blown Sand, 1 Blucks Pool Limestone [Obsolete Name And Code: Use BRL] Blue Anchor Formation Blue Anchor Formation And Penarth Group (Undifferentiated) Blue Clays Blue Coal (Somerset) Blue Flats Ironstone (South Staffordshire) Blue Lias [Obsolete Code: Use BLI] Blue Lias [Obsolete Code:Use BLI] Blue Lias Formation Blue Lias Formation (Hebrides) Blue Lias Formation (Hebrides) and Breakish Formation, Interdigitated Blue Lias Formation (Hebrides), Breakish Formation, And Beinn Iadain Mudstone Formation Blue Lias Formation (Marginal Facies) Blue Lias Formation And Charmouth Mudstone Formation (Undifferentiated) Blue Lias Formation, Charmouth Mudstone Formation And Dyrham Formation (Undifferentiated) Blue Lias Formation, Scunthorpe Mudstone Formation And Charmouth Mudstone Formation (Undifferentiated) Blue Limestone Blue Marl Blue Marle Blue Tour Coal (Ayrshire) Blue Tour Limestone Blue Wick Sands Blue-Grey Series Blues Limestones Bluntisham Clay Blyth Coal (Nottingham) Blyth Member Bnm3 Third Brown Metal Coal (West Yorkshire) Bo'ness Lower Ironstone Bo'ness Six Foot Coal Bo'ness Splint Coal (Glasgow Area; Central Coalfield) Bo'ness Upper Ironstone Boat Harbour Marine Band Boat Of Garten Pluton Boathill Limestone Member Bobberstone Farm Gravel Member Bochruben Formation Bod Deiniol Member Bodafon Beds Bodafon Formation Bodafon Moor Flags Bodafon Quartzite Bodeidda And Deganwy Mudstones Bodeidda Mudstones [Obsolete Name And Code: Use COMU] Bodeidda-Deganwy Mudstone Bodelwyn Beds Bodelwyn Formation Bodgadle Member Bodieve Tuff Bodlondeb Tuff Member Bodmin Intrusion Bodorgan Formation Bodwr Coal (South Wales) Bodwrog Marble Bodwrog Member Bofrishlie Burn Sandstone Formation Bofrishlie Burn Sandstone Member Bofrishlie Slate Formation Bog iron-ore Bog Mine Outliers Bog Quartzite Bog Quartzite Formation Boganglogh Margin Type Ultramafic Intrusion Boggierow Intrusion Boghead Gas Coal Boghole and Whitemire Beds Boglochty Beds Bogne Hollow Chert Member Bognor Member Bognor Rock Bed Bognor Sand Bognor Sand Member Bogside Ironstone And Coal Bogside Limestone Bogside Main Coal Bogside Thick Coal Boheeshane Chalk Formation Boheeshane Chalk Member Bold Formation Bold Venture Beds Bolders Bank Formation Bole Hill Channel Bole Hill Sandstone Bollandoceras Hodderense Beds Bollin Mudstone Formation Bollin Mudstone Member Bolsa Member Bolton Marine Band Bolton Marine Band [Local Name: Use AGMB] Bomb Crater Bonahaven (Bunnahabhain) Dolomite Formation Bonahaven Dolomite Bonaly Group [Obsolete Name And Code: Use BNY] Bonaly Volcanic Formation Bonaly Volcanic Member Bonanza Coal Bonawe Succession Bonchester Hill Plug Bonds Glen Limestone Member Bone Bed Limestone Bone Coal (Dungannon) Bone Coal (South Lancashire) Bonnington Intrusion (?Sill) Bonnyhill Craw Coal Bonsall Microgabbro Sill Bonsall Moor Basaltic Vent Bookham Conglomerate Bed Boon's Member Bopeep Flints Bordeaux Pit Member Border Group Border Group, Lower [Obsolete Code: Use LBO] Border Group, Lower [Obsolete Name And Code: Use BGN Or LYNE] Border Group, Middle [Obsolete Code: Use MBO] Border Group, Middle [Obsolete Name And Code: Use FELL] Border Group, Upper [Obsolete Code: Use UBO] Border Group, Upper [Obsolete Name And Code: Use TYLS] Borders Glacigenic Subgroup Boreland Coal (Fife) Boreland Formation [Obsolete Name And Code: Use SHIN] Boreray Basic Magmatic Breccia Intrusion Borestone Coal Borrowash Sand And Gravel Borrowdale Sill Suite Borrowdale Volcanic Group Borrowdale Volcanic Series Borth Mudstones Formation Borthwick Sill Boscastle Formation Boscastle Measures Boscombe Sand Formation Bosies Bank Formation Bosworth Clay Member Botany Grit Botany Limestone Bothkennar Gravel Bothkennar Gravel Formation Bothkennar Gravel Member Bothwell Bridge Marine Band Bothyhill Gravels Member Botney Cut Formation Bottom Beaumont Coal (Northumberland) Bottom Bed Bottom Beeston Coal (West Yorkshire) Bottom Bensham Coal (Northumberland) Bottom Brass Thill Coal (Durham) Bottom Brockwell Coal (Northumberland And Durham) Bottom Brown Metal Coal Bottom Busty Bottom Busty Coal (Northumberland And Durham) Bottom Coal (Birmingham) Bottom Coal (Rothbury Area) [Obsolete Name And Code: Use PLY] Bottom Coal (South Staffordshire) Bottom Coatyards Coal (Northumberland) Bottom Crag Limestone Bottom Durham Low Main Coal (Northumberland And Durham) Bottom First Waterloo Coal (Derby) Bottom Five Quarter Coal (Northumberland And Durham) Bottom Fourth Waterloo Coal (Derby) Bottom Furnace Coal (South Lancashire) Bottom Furnace Mine Bottom Furnace Mine Coal Bottom Haigh Moor Coal Bottom Harvey Coal (Durham) Bottom Hebburn Fell Coal (Northumberland) Bottom High Main Coal (Derby) Bottom High Main Coal (Northumberland And Durham) Bottom Holers Coal (Birmingham) Bottom Holers Coal (South Staffordshire) Bottom Hutton Coal (Durham) Bottom Little Coal (Somerset) Bottom Little Limestone Bottom Little Vein Bottom Main Coal (Durham) Bottom Marshall Green Coal (Northumberland And Durham) Bottom Maudlin Coal (Durham) Bottom Moorland Coal (Northumberland) Bottom Neddy Coal Bottom Neddy Mine Bottom Neddy Mine Coal Bottom Netherwitton Coal (Northumberland) Bottom Of Broomhill Coal Bottom Pigeon House Coal (South Lancashire) Bottom Plessey (Northumberland) Bottom Plessey Coal (Northumberland) Bottom Robins Coal (South Staffordshire) Bottom Rock Bottom Ryhope Five Quarter Coal (Northumberland) Bottom Ryhope Little Coal (Northumberland And Durham) Bottom Saltwick Coal (Northumberland) Bottom Second Waterloo Coal (Derby) Bottom Shuttles Coal (South Lancashire) Bottom Shuttles Mine Bottom Shuttles Mine Coal Bottom Three-Quarter Coal (Northumberland And Durham) Bottom Tilley Coal (Northumberland And Durham) Bottom Usworth Coal (Northumberland And Durham) Bottom Vein Mine Ground (South Wales) Bottom Victoria Coal (Northumberland And Durham) Bottom Wheatworth Coal (West Yorkshire) Bottom Widdrington Main Coal Bottom Yard Coal (Northumberland) [Obsolete Name And Code: Use YARD] Bottom Yard Coal (South Lancashire) Boueti Bed Boulby Halite Boulby Potash Member Boulder Clay Boulder Clay And Laminated Clay (Alternate Beds) Boulder Clay Of Lake District Provenance Boulder Clay With Jurassic Fossils Boulder Clay, Glacial Till Bouldnor Copse Gravel Member Bouldnor Formation Bouley Rhyolite Formation Bouley Rhyolite Formation [Obsolete Code: Use BRH] Boultypatrick Grit Boundary Zone And Yell Sound Division (Undifferentiated) Boundary Zone Complex Bournemouth Formation [Obsolete Name And Code] Bournemouth Freshwater Beds Bournemouth Group Bournemouth Marine Beds Bourton Limestone Member Bovevagh Till [Obsolete Name And Code] Bovey Beds Bovey Formation Bovisand Beds Bovisand Formation Bovisand Formation [Obsolete Code: Use BOV] Bovisand Formation And Staddon Formation (Undifferentiated) Bow Beds Bow Breccia Formation Bow Conglomerates [Obsolete Name And Code: Use BOB] Bowden Way Beds Bowden Way Beds And Acuminata Beds (Undifferentiated) Bowfell Links Member Bowfell Links Sandstone Member Bowhills Formation [Obsolete Name And Code: See EN] Bowhills Member Bowhouse Coal (Fife) Bowhousebog Coal Bowhousebog Ironstone Bowland High Group Bowland High Group And Craven Group (Undifferentiated) Bowland Shale Formation Bowland Shale Formation (Offshore) [Obsolete Code: Use BSG] Bowland Shale Group [Obsolete entry, use BSG] Bowland Shale, Lower Bowland Shales Bowling Alley Coal (North Staffordshire) Bowmore Psammite Bowmore Sandstone Bowmore Sandstone Group Bowsebank Coal (Fife) Bowsey Wood Formation Box Law Plug Boyd's Burn Lava Member Boyd's Burn Lavas Boyle Sandstone Formation Boyn Hill Gravel Formation Boyn Hill Gravel Member Boyn Hill Terrace Boyndie Bay Formation [Obsolete Name And Code: See MCD] Boyndie Bay Group Boyne Castle Limestone Member Boyne Craig Till Formation Boyne Hollow Chert Member Boyne Limestone [Obsolete Name And Code: Use BOYL] Boyne Limestone Formation Bozeat Till Bracadale Formation Bracadale Group Brachiopod Beds Brackaville Coal (Dungannon) Brackenslack Limestone Brackish Lagoonal Deposits Brackish Water Beds Bracklesham Beds Bracklesham Beds And Barton Clay (Undifferentiated) [Obsolete Name And Code: See BRBA] Bracklesham Group Bracklesham Group [Duplicate Code: Use BRB] Bracklesham Group And Barton Group (Undifferentiated) Bracklesham Sand Bracklesham Sand/Beds Bracklinn Falls Conglomerate Member Bradford Beds Bradford Clay [Obsolete Name And Code] Bradford Coal Formation Bradford Coral Bed Bradford Dale Lava Bradford Four Foot Coal (South Lancashire) Bradford Four Foot Mine Bradford Four Foot Mine Coal Bradford Marine Band Bradford Marine Band [Local Name: See HTMB] Bradford Threequarters Coal (South Lancashire) Bradford Threequarters Mine Bradford Threequarters Mine Coal Bradgate Formation Bradgate Tuff Formation [Obsolete Name And Code: Use CMBT] Bradley Coal Bradley Flags Bradley Grits [Obsolete Name And Code: Use BDLF] Brae Formation Brae Pluton Braemore Conglomerate Formation Braemore Lodge Sandstone Member Braemore Mudstone Braemore Mudstone Formation Braemore Mudstone Formation And Braemore Sandstone Formation (Undifferentiated) Braemore Sandstone Formation [Obsolete Name And Code, Use: OA] Braemore Sandstones Braich Tu Du Volcanic Formation Braicklaich Sand Member Braicklaich Sands Member Braid Hills Volcanic Member Braidon Bay Conglomerate Member [Obsolete Name And Code: See CATC] Brainshaugh Limestone Bramhope Grit Brampton Lower Felltop Limestone [Obsolete Name And Code: Use NWL] Brampton Upper Felltop Limestone [Obsolete Name And Code: See Revision Data] Brand Group Brand Hills Formation Brand Series Brandon Flint Member Brandon Flint Series Brandon Grit Brandon Sandstone Bed Brandsby Roadstone Member Brandy Craig Formation Brandy Craig Lava Formation Branksome Sand Formation Branksome Sand Formation And Selsey Sand Formation (Undifferentiated) Branscombe Mudstone Formation Bransty Cliff Sandstone Member Brant Mudstone Formation [Obsolete Name And Code: Use CHAM] Brantingham Formation Brantingham Member Branxton Coal (Fife) Braslyd Coal (South Wales) Braslyd Fach Coal (South Wales) Braslyd Rider Coal (South Wales) Brass Thill Coal (Durham) Brass Vein Coal (South Wales) Brassey Coal (South Lancashire) Brassington Formation Brasspoint Flint Brassy Coal (Cumbria) Brassy Mine Brathay Flag Formation Brathay Flags Brathay Formation Brathay Formation, Birk Riggs Formation And Coldwell Formation (Undifferentiated) Brathay Formation, Birk Riggs Formation And Wray Castle Formation (Undifferentiated) Braunroter Saltzton Brays Silts Formation Brazilly Coal (Forest Of Dean) Breadstone Shale Formation Breadstone Shale Formation And Micklewood Beds (Undifferentiated) Breadstone Shales Breakish Formation Breaky Bottom Flint Breakyneck Scar Limestone Formation Breccia Gravel Breccia Group Breccia Of Kenilworth,Lower Breccia Of Kenilworth,Upper Breccio-Conglomerate Breckells Mudstone Formation Breckells Mudstone Member Breckells Mudstones Brecknockshire Drift Brecknockshire Formation Brecknockshire Glacigenic Formation Brecks Coal Brecon Beacons Group Brecon Subgroup Breedon Breccia Breedon Member Breighton Cover Sand Formation Breighton Sand Formation Brendon Formation Brendon Hill Beds Brennand Grit Brennand Grit Formation (Lancaster District) Brennand Grits Brennand Grits Formation [Obsolete entry, use BRNG] Brennarnd Grit Brent Formation Brent Group Bressay Flagstone Formation Bressay Flagstones Bretford Member Bretford Member, Lower Facet Bretford Member, Upper Facet Bretford Sand and Gravel Member Bretford Sand and Gravel Member and Wasperton Sand and Gravel Member (Undifferentiated) (Warwickshire Avon) Bretford Sand And Gravel Member, Lower Facet Bretford Sand And Gravel Member, Upper Facet Bretford Terrace Deposits [Warwickshire Avon] Brewin's Bridge Microgabbro Dyke Brewood Till Formation Breydon Formation Brick Clay Brickclay Brickearth Brickearth And Steyne Wood Clay Brickiln Coal (North Staffordshire) Bricklieve Limestone Formation Brickworks Marine Band Brickworks Marine Band [Local Name: Use HNMB] Bridge Farm Gravel Member Bridge Limestone Bridge Limestone [Obsolete Code: Use BRDL] Bridgend Flags Bridges Formation Bridges Formation [Obsolete Code: Use BRGP] Bridges Group Bridges Sandstone Formation Bridgeton Formation Bridgeton Sand Member Bridgewick Marls (One) Bridgewick Marls (Three) Bridgewick Marls (Two) Bridgnorth Sandstone Formation Bridgnorth Sandstone Formation [Obsolete Code: Use BRI] Bridlington Crag Bridport And Yeovil Sands Bridport Sand Formation Bridport Sands Briele Ground Formation Brielle Ground Formation Brierley Coal (West And South Yorkshire) Brierley Division Brierley Hill Cluster Brierley Member Brierley Rock Brig Formation Brig o' Balgownie Conglomerate Formation Brig O'Balgownie Conglomerate Formation Brigantian Rocks (Undifferentiated) Bright Coal Brighton Marl Brights Coal (North Staffordshire) Brights Coal (Somerset) Brimham Grit Brimham Shale Brims Castle Dolomite Member Brims Castle Dolomitic Limestone Member Brims Limestone Member [Obsolete Name And Code: Use BCDL] Brindister Flagstones Brine Extraction Bringewood Beds [Obsolete Name And Code] Bringewood Beds and Lower Elton Beds Bringewood Group Brinkmarsh Beds Brinsley Coal (Nottingham And Derby) Brinsley Thin Coal (Derby) Briscloonagh Sandstone Formation Bristol Avon River Terrace Deposits, 1 Member Bristol Avon River Terrace Deposits, 1 Member and 2 Member Undifferentiated Bristol Avon River Terrace Deposits, 2 Member Bristol Avon Valley Formation Britannia Catchments Group Britannia Sandstone Formation Britannic Marine Band Britannic Marine Band [Local Name: See SOMB] Brithdir Beds Brithdir Coal (Lower Leaf) (South Wales) Brithdir Coal (South Wales) Brithdir Coal (Upper Leaf) (South Wales) Brithdir Formation Brithdir Member Brithdir Rider Coal (South Wales) Brithidir Breccia Brithidir Porphyry Brithion Formation Brithion Tuff British Coastal Deposits Group British Tertiary Volcanic Province Group [Obsolete Name And Code] Briton's Lane Formation Briton's Lane Sand And Gravel Member Briton's Lane Sands And Gravels Brixham Limestone Brixham Limestone Formation Broad Law Intrusion Broad Law Vein Broad Vein Broad Vein Formation Broad Vein Mudstone Formation Broadearth Fireclay Broadford Beds (Part) Broadford Beds Formation Broadford Beds Formation And Pabay Shale Formation (Undifferentiated) Broadford Gabbro (Skye Eastern Red Hills Centre) Broadlee Glen Sandstone Member Broadlee Glen Sandstones Formation Broadlie Coal Broadstairs Member Broadstone Clay Member Broadstone Limestone [Obsolete Name And Code: Use HUR] Broadstone Sand Member Broadstone Sand Member And Oakdale Sand Member (Undifferentiated) Brochel Member Brock Crags Andesite Formation Brock Hall Coal (Wyre Forest) Brocka Bank Grit Bröckelschiefer Member Brockholes Sandstones Brockley Down Limestone Brockley Plug Brockram Brockwell Coal (Northumberland And Durham) Brockwell Rider Coal (Northumberland And Durham) Brodick And Lamlash Beds Brodick Breccia Brodie Sandstone unit Brofiscin Oolite Formation Bromfield Sand and Gravel Bromley No. 4 Bromleysmill Shale Formation Bromleysmill Shales Formation Bromsgrove Sandstone Formation [Obsolete Name And Code: Use HEY] Bromsgrove Sandstone Formation, Helsby Sandstone Formation, Wildmoor Sandstone Formation And Wilmslow Sandstone Formation (Undifferentiated) Bron Y Graig Formation Bronllwyd Grit Formation Bronsil Shale Formation Bronsil Shales Bronydd Formation Bronzite Picrite Dykes Of The Scourie Dyke Swarm Brooch Coal (South Staffordshire) Brooch Coal (South Staffordshire) [Obsolete Code: Use BROO] Brooch Fireclay Brooch Ironstone Brook End Sandstone Member Brook Formation Brook-Bottom Tuff Brooks Mill Mudstone Formation [Obsolete Name And Code: Use BCMU] Brooksbottom Sandstones Brooksbottoms Coal (South Lancashire) Brooksbottoms Grit Brooksby Sand And Gravel Broom Farm Sandstone Formation Broom Formation Broom Sub-Unit Broome Member Broomhill Clay Formation Broomhill Clay Member Broomhill Formation Broomhill Main (Northumberland) Broomhill Main Coal (Northumberland) Broomhill Member Broomhouse Formation Broomhouse Sand And Gravel Formation Brora Arenaceous And Argillaceous Bed [Obsolete Name And Code: See BRARG And BRARE] Brora Arenaceous Formation Brora Arenaceous Series Brora Arenaceous Series and Upper Part Of Brora Argillaceous Series Brora Argillaceous Formation Brora Argillaceous Formation (Upper Part, Fascally Siltstone Member) Brora Argillaceous Series Brora Argillaceous Series (Pars) Brora Argillaceous Series (Upper Part) Brora Brick Clay Member Brora Coal Brora Coal Bed Brora Coal Formation Brora Coal Member Brora Coal, Shales, Shelly Clays and Sandstones, and 'Roof Bed' Brora Formation Brora Lower Oolite Brora Roof Bed Brora Sandstone Member Brora Shale Formation Brora Shale Member Brotherton (Magnesian Limestone) Formation Brotherton Beds Brotherton Formation Broubster Till Member Broughderg Schists [Obsolete Name And Code] Broughton Coal Broughton Moor Formation Broughton Moor Formation And Appletreeworth Volcanic Formation (Undifferentiated) Brow Vein Browgill Beds Browgill Formation Browgill Member Browgill Shales [Obsolete Name And Code: Use BRW] Brown And Grey Sandstone Member Brown Bank Bed Brown Bank Formation Brown Bank Ignimbrite Formation Brown Bank Tuff Formation Brown Clay With Stones Brown Howe Member Brown Howe Tuff Member Brown Metal Coal Brown Rake Coal (Nottingham And Derby) Brown Sands And Gravels Brown's Fireclay Brown's Vein Brownber Formation Brownber Pebble Bed Brownber Pebble Beds [Obsolete Name And Code: Use BNBF] Brownlow Mudstone [Obsolete Name And Code] Brownstone Group [Obsolete Name And Code: See BRS] Brownstones Brownstones (In Part) Brownstones Formation Broxburn Marls Broxburn Shale Bruar Psammite Formation Bruce A Bruce B Bruce Sandstone Member Bruce Upper Sands Brunachan Psammite Formation Brunel Beds Brunel Formation Brunton Quarry Coal (Northumberland) Brunton Quarry Sandstone Brushford Member Brutach Dearg Member Bryans Coal (Lothian) Bryn Beds Bryn Bedwen Formation [Obsolete Name And Code: Use CER] Bryn Bedwen Formation [Obsolete Name And Code:Use CER] Bryn Brith Beds Bryn Brith Grits Bryn Brith Member Bryn Coal Bryn Coal (South Wales) Bryn Dowsi Mudstone Bryn Nicol Formation Bryn Nicol Formation, Coed Ifan Facies Bryn Nicol Formation, Pen Derlwyn Facies Bryn Siltstone Formation Bryn Syllty Disturbed Bed Bryn Tirion Member Bryn-Crin Basaltic Trachyandesite Bryn-Glas Formation Bryn-Glas Group Bryn-Glas Mudstones Bryn-Teg Volcanic Formation Bryncoch Coal Bryncoch Coal (South Wales) Bryncroes Formation Bryne Formation Brynloi Coal (South Wales) Brynrefail Group Brynwhilach Two-Feet Coal (South Wales) Bryozoa Band (Ravenstonedale) Brython Glacigenic Group Bu Ness Group Bu Ness Sandstone Formation Bualintur Formation Buccleuch Limestone [Obsolete Code: Use BUCC] Buccleuch Limestone [Obsolete Name And Code: Use FFL] Buchan Beds [Obsolete Name And Code: Use BUG] Buchan Formation Buchan Formation [Obsolete Code: Use BUHN] Buchan Gravels Formation Buchan Gravels Group Buchan Gravels Member Buchan Ridge Gravel Member Buchanan Clay Member Buchanan Formation Buchlyvie Sandstone Member Buck Hills Greywacke Buck Hills Grit Buck Hills Member Buckator Formation Buckbanks Sandstone Member Buckhaven Planolites Bed Buckholm Formation Buckholm Grits Buckholme Formation Buckie Beds Buckie Formation Buckie Limestone Formation Bucklandi Clays Bucklands Clays Buckle Marls (Five) Buckle Marls (Four) Buckle Marls (One) Buckle Marls (Six) Buckle Marls (Three) Buckle Marls (Two) Bucklebury Common Gravel Member Bucklebury Gravel Buckley Fireclay Formation [Obsolete Name And Code: Use ETM] Buckstone Grit Buddon Sands Bude Formation Bude Formation And Bideford Formation (Undifferentiated) Bude Sandstones Budleigh Salterton Conglomerate Budleigh Salterton Conglomerate And Sandstone Budleigh Salterton Pebble Bed Budleigh Salterton Pebble Beds Budleigh Salterton Pebble Beds Formation [Obsolete Name And Code Use: CHES] Buff Coal (Bristol Area) Bught Craig Member Building Stones Buildwas Beds Buildwas Formation Buildwas Formation And Coalbrookdale Formation (Undifferentiated) Builth Mudstones Formation Builth Volcanic Formation [Obsolete Name And Code: Use BUVO] Builth Volcanic Group Buitenbanken Formation Buldoo Flagstone Formation Bulkeley Hill Formation Bulkeley Hill Sandstone Formation [Obsolete Name And Code Use: HEY] Bull Cliff Bed Bull Coal (Somerset) Bull Crag Coal (Northumberland) Bull Gap Shales [Obsolete Name And Code] Bull Vein Bulldog Coal (South Lancashire) Buller's Hill Gravel Buller's Hill Gravel Formation Buller's Hill Gravel Member Bullerthorpe Lane Sandstone Bullhead Bed Bullhurst Coal (North Staffordshire) Bullhurst Rock (North Staffordshire) Bullion Mine Coal (South Lancashire) Bullion Mine Rock [Obsolete Name And Code: Use GAS] Bullrock Greywacke Bullrock Greywacke Formation Bullrock Greywacke Member Bullslaughter Limestone Formation [Obsolete Name And Code: Use OB] Bulman Main Coal (Northumberland) [Also Known As Cancer Coal] Bulmer Vein Bulthy Formation Bunchrew Sandstone Member Bundoran Shale Formation Bungalow Formation Bungilow Coal (North Staffordshire) Bunny Sand And Gravel Bunter (Undifferentiated) [Obsolete Name And Code] Bunter Conglomerate Beds Bunter Pebble Beds [Obsolete Name And Code: Use CHES] Bunter Sandstone Bunter Sandstone Formation Bunter Shale Formation Bunter Siltstone Member [Obsolete Name And Code] Burcot Breccia Burcot Member Burdiehouse Limestone Bure Valley Beds Bure Valley Beds And Weybourne Crag Bure Valley Formation Burford Coal Formation [Obsolete entry, use BRFC] Burford Coal Group Burford Coal Member Burghead Beds Burghead Sandstone Burghead Sandstone Formation Burghie Shale Member Burghy Coal Burgy Coal (South Lancashire) Burial Ground Buried Gravel Layer Burlington Member Burn Bridge Arenite Burn Of Benholm Peat Burn of Benholm Peat Bed Burn Of Benholm Peat Member Burn Of Mar Sandstone Formation Burn Side Conglomerate Member Burncrooks Pyroclastic Member Burncrooks Volcaniclastic Member Burnfoot Bridge Coal (New Cumnock) Burnfoot Shales Burnham Chalk Formation Burnham Formation Burnhead Intrusion Burnhouse Lava Member Burnhouse Lavas Burnhousemoor Member Burning Mount Plug Burnley Four Feet Coal Burnley Four Foot Coal (Lancashire) Burns Beds Burns Sandstone Member Burnside Formation Burnside Intrusion (Plug) Burnside Sandstone Formation Burntisland Lavas Burntisland Marine Band Burnwood Coal (North Staffordshire) Burnwood Ironstone Burra Firth Formation Burradon Coal (Northumberland) Burraton Formation Burrier Wick Till Formation Burrington Oolite Formation [Obsolete entry, use BO] Burrington Oolite Subgroup Burthel Beds Burtle Beds Burtle Formation Burtle Sands Beds Burton Cliff Formation Burton Cliff Palynological Association Burton Formation Burton Joyce Marine Band Burton Joyce Marine Band Burton Joyce Marine Band Burton Lazars Head Burton Sub-Unit Burwardsley Hill Bed Burway Formation Burway Formation [Obsolete Code: Use BUGP] Burway Group Bush Coal (Fife) Bushley Green Member Bushley Green Terrace Bushley Green Terrace (Upper Part) Bushley Green Terrace Deposits Bushley Green Terrace Deposits (River Severn) Bushy Coal (South Wales) Bussell's Member Bussell's Mudstone Member Busty Coal (Northumberland And Durham) Butcombe Sandstone Butcombe Sandstone Member Butcombe Sandstone Member [Obsolete Name And Code: Use AS] Bute Coal (South Wales) Bute Conglomerate Formation Bute Limestone Butt Hill Member Butterby Member Butterby Till Member Buttergask Flagstone Member Buttergask Formation Buttergask Member Butterly Marine Band Buttermere Formation Buttermere Formation (Hornfelsed) Buttershaw Limestone Butterton - Swynnerton Dykes Butterton Sandstone Butterton Sandstone Bed Butterton Sandstone Member Buttington Mudstone Formation Buxton Rock [Obsolete Code: Use BUR] Buxton Rock Member Bwlch Groes Porphyritic Microgranite Bwlch Mawr Microgranodiorite Intrusion Bych Beds Bychton Two Yard Coal (North Wales) Bydown Chert [Obsolete Name And Code: See COH] Byestead's Sandstone Byley Mudstone Formation Byley Mudstone Formation And Wych Mudstone Formation (Undifferentiated) Byley Mudstone Member Byne Hill Granite Byne Hill Intrusion Byth Gravel Byth Till Byth Till Formation Bytham Catchments Subgroup Bytham Formation Bytham Sand and Gravel Formation Bytham Sands And Gravels Bytham Sands And Gravels Formation Bytham Sands And Gravels;Unit 2,Shouldham Sands Of Lewis,P.127-130 In Lewis Et Al 1991 C Sands C-Bed Evaporite C2 And C2-3 Slate Caaf Water Limestone Formation Caban Conglomerate Formation Caban Conglomerate Formation (Formerly Facies) Caban Conglomerate Formation (Lower Conglomerate Of Lapworth) Caban Conglomerate Formation (Upper Conglomerate Of Lapworth) Caban Conglomerate Formation: Caban Conglomerate Facies Caban Conglomerate Formation: Fifth Sequence Of Caban Conglomerate Facies Caban Conglomerate Formation: First Sequence Of Caban Conglomerate Facies Caban Conglomerate Formation: Fourth Sequence Of Caban Conglomerate Facies Caban Conglomerate Formation: Second Sequence Of Caban Conglomerate Facies Caban Conglomerate Formation: Third Sequence Of Caban Conglomerate Facies Caban Conglomerates Caban Group [Obsolete Name And Code] Cabrach Sandstone [Obsolete Name And Code: Use CAB] Cabrach Sandstone Formation Caburn Beds Caburn Flints Caburn Marl Caburn Sponge Bed Cadbury Beds Cadbury Breccia Formation Cadder Clay Member Cadder Formation Cadder Sand And Gravel Formation Cadder Sand Formation Caddroun Burn Beds Cadeby (Magnesian Limestone) Formation Cadeby Formation Cadell's Parrot Coal Cademan Volcanic Breccia Member Cadgers Loan Rock Cadgers Loan Sandstone Cadh'-an-Righ Shale Member Cadham Craw Coal Cadham Little Coal Cadham Main Coal Cadham Under Coal Cadnant Shale Formation Cadnant Shales Cadnant Shales Formation [Obsolete Name And Code: See NOG] Cae Adda Volcanic Formation Cae Castell Formation Cae'r-Mynach Formation Caedavid Coal (South Wales) Caenlochan Schist Formation Caer Beris Member Caer Caradoc Andesites [Obsolete Name And Code] Caer Caradoc Rhyolites (A) [Obsolete Name And Code] Caer Caradoc Rhyolites (B) [Obsolete Name And Code] Caerau Coal (South Wales) Caerau Formation And Blaen Myherin Mudstones Formation (Undifferentiated) Caerau Mudstones Formation Caerau Mudstones Formation (Lower Tongue) Caerau Mudstones Formation (Upper Tongue) Caerbwdy Group Caerbwdy Sandstone Formation Caerbwdy Sandstone Formation And Solva Group (Undifferentiated) Caerbwdy Series Caered Flags Caerfai Bay Shales Formation Caerfai Beds Caerfai Formation Caerfai Group Caerfai Series Caergribin Rhyolite Intrusion Caerhys Shale Formation Caerketton Group Caerketton Volcanic Group Caerketton Volcanic Member Caernarfon Bay Formation Caesar's Camp Formation Caesar's Camp Gravel Caesar's Camp Gravel (A) [Obsolete Code: Use CCGR] Caesar's Camp Gravel (B) [Obsolete Code: Use CCGR] Caesar's Camp Gravel Formation Cailleach Head Formation Cairfai Bay Shales Formation [Obsolete Name And Code: Use CFBS] Cairn Gibbs Psammite Formation Cairn Liath Quartzite Member Cairn Of Claise Transition Formation Cairn Trench Intrusion Cairnbulg Diorite Cairndinnis Plug Cairnerzean Formation [Obsolete Name And Code: Use GDF] Cairnfield Actinolitic Flags [Obsolete Name And Code: Use CCFL] Cairnfield Calcareous Flag Formation Cairngarroch Intrusion Cairngorm Granitic Suite Cairngorm Pluton Cairngorm Pluton, Phase 1 Cairngorm Pluton, Phase 2 Cairngorm Pluton, Phase 3 Cairngorm Pluton, Phase 4 Cairngorm Pluton, Phase 5 Cairngorm Pluton, Phase 6 Cairnharrow Formation Cairns Of Ord Intrusion Cairnsmore Of Carsphairn Pluton Cairnsmore Of Fleet Granite Cairnsmore Of Fleet Pluton Cairnwell Quartzite Formation Caister Coal Formation Caithness Flagstone Group Caithness Flagstone Series Caithness Shelly Drift Caithness Shelly Till Calcareous Conglomerate Group [Obsolete Name And Code: See EN] Calcareous Grit Calcareous Grit, Lower Calcareous Group (Lower Culm Measures) Calcareous Sandstone Bed Calcareous Series, Durness Limestone, Durness Limestone Or Dolomite Calcareous Shale Member Calcareous tufa Calciferous Sandstone Calciferous Sandstone Measures [Obsolete Name And Code: See SYG] Calcite Mudstone Group Calcrete Caldecote Volcanic Formation Caldecote Volcanic Series Calder Mudstone Formation Calder Mudstone Member Calder Sandstone Formation [Obsolete Name And Code Use: WLSF] Calders Member Caldon Low Conglomerate Member Caldron Hill Sill Caledonia Glacigenic Group Caledonian Igneous Suite [Obsolete Name And Code: See CIGSS] Caledonian Igneous Supersuite Caledonian Supersuite Calettwr Quartzite Calettwr Quartzite Member Calettwr Quartzite Member And Hirnant Limestone Member (Undifferentiated) Caley Crags Grit Caley Grags Grit Calhame Limestone California Clayband Ironstones California Glacigenic Group California Quarry Formation California Till Member Calke Abbey Sandstone Formation Callan Group Callander Craig Conglomerate Callander Craig Conglomerate Member Callant Limestone Callovian And Oxfordian Rocks (Undifferentiated) Calmstone Coal (Sanquhar) Calmy Limestone Calne Freestone And Coral Rag Calne Sands Formation Calp Limestone Group Calp Limestone Of The Calp Or Middle Limestone Calp Or Middle Series [Obsolete Name And Code] Calp Sandstone Of The Calp Or Middle Limestone Calp Shale Of The Calp Or Middle Limestone Calton Limestone [Obsolete Name And Code: Part Of MI] Cam Crags Sandstone Member Cam Spout Tuff Cam Spout Tuff Member Cam Valley Formation Camas Chil Mhalieu Formation Camas Malag Formation Camasunary Sandstone Member Camasunary Siltstone Member Cambeck Beds Cambeck Member Camberley Sand Formation Cambir Dolerite Sheet-Swarm Cambois Little Coal (Northumbria) Cambrian And Ordovician Rocks (Undifferentiated) Cambrian Quartzite Cambrian Rocks (Undifferentiated) Cambridge Bed Cambridge Greensand [Obsolete Name And Code: See CBG] Cambridge Greensand Member Cambriense Marine Band Cambuslang Marble Camderry Member Camlo Hill Group Camnant Mudstone Formation Camnant Mudstones Formation Camp Fauld Till Formation Campanian Rocks (Undifferentiated) Campbell Park Marine Band Camphill Gelifluctate Bed Camphill Limestones Camphouse Quartz-Dolerite Intrusion Camps Shale Campsie Claybands Campsie Dyke Campsie Formation Campsie Lava Member Campsie Limestone Member Camregan Group [Obsolete Name And Code: Use (Part Of) DLY] Camregan Limestone, Upper [Obsolete Name And Code: Use WOB] Canal Cutting Canal Embankment Canaston Beds Cancelloceras Cancellatum Marine Band Cancelloceras Cancellatum Marine Band [Obsolete Code: Use G1A1] Cancelloceras Cumbriense Marine Band Cancelloceras Cumbriense Marine Band [Obsolete Code: Use G1B1] Cancer Coal Candleston Oolite [Obsolete Name And Code: Use BFO] Caninia Dolomite [Obsolete Name And Code] Caninia Oolite [Obsolete Name And Code: Use GUO] Caninia Shales And Dolomite Canisp Porphyry Sills Cann Sand Member Cann Wood Slate Formation Canna Formation Canna Lava Formation Cannapark Limestone Cannel Coal (Cumbria) Cannel Coal (In Pennine Lower Coal Measures South Lancashire) Cannel Coal (In Pennine Middle Coal Measures South Lancashire) Cannel Coal (Leicestershire) Cannel Coal (Machrihanish) Cannel Coal (Midgeholm) Cannel Coal (North Wales) Cannel Mine Cannel Mine Coal Cannel Mine Marine Band Cannel Mine Marine Band [Local Name: See MFMB] Cannel Rock (South Lancashire) Cannel Row Coal (North Staffordshire) Cannel Seam [Obsolete Code: Do Not Use] Cannock Chase Formation [Obsolete Name And Code Use: CHES] Canonbie Bridge Sandstone Formation Canonbie Five Foot Coal Canonbie Nine Foot Coal Canonbie Seven Foot Coal Canonbie Six Foot Coal Canonbie Three Foot Coal Cantray Till Member Canty Bay Sandstone Caochandye Quartzite Member Caoilte Formation Caoilte Sequence Caoilte Subsequence Cape Shore Formation Cape Wrath Sandstone Member Capel Curig Volcanic Formation Capel Parc Formation Capelaw Acid Volcanic Formation Capelaw Basic Group And Capelaw Acid Group Capelaw Basic Volcanic Formation Capelaw Volcanic Formation Capelaw Volcanic Member Capistal Psammite Formation Capledrae Parrot Coal Caprington Sill Captain Sandstone Member Captain's Bridge Limestone Captain's Fireclay Caradoc And Ashgill Rocks (Undifferentiated) Caradoc Rocks (Undifferentiated) Caradoc Shales Caran Sandstone unit Carbeth Lava Member Carbeth Lavas Carbonaceous Group Carboniferous And Permian Rocks (Undifferentiated) Carboniferous Lavas Carboniferous Limestone (Series) Carboniferous Limestone [Obsolete Name And code] Carboniferous Limestone Series Carboniferous Limestone Supergroup Carboniferous Rocks (Undifferentiated) Carboniferous-Permian Extensional Supersuite Carbost Conglomerate Member Cardiaster Beds Cardiff Group Cardigan Bay Formation Carding Mill Grit Cardingmill Grit [Obsolete Code: Use CDDG] Cardingmill Grit Member Careg Onen Formation Careg-Onen Beds (A) [Obsolete Name And Code: Use OCO] Careg-Onen Beds (B) [Obsolete Name And Code: Use OCO] Careg-Onen Limestone Formation [Obsolete Name And Code: Use LEEL] Careg-Onen-Beds Careg-Wiber Volcanic Formation Carewoodrig Vent Carey Beds Carey River Basalt Formation Carey Silt Member Carganamuck Limestone Formation Carghidown Beds Carghidown Formation Carham Limestone Carham Limestone Bed Carham Stone Carhurlie Coal Carland Sandstone Member Carlandcheek Vent Carlane Sandstone Formation Carleton Hall Clay Member Carleton Silt Formation Carlinden Formation Carlinden Shale Formation Carlingford Complex Carlingford Limestone Group Carlops Oil-Shale Carlops Shale Carlton Formation [Obsolete Name And Code: Part Of GUN] Carlton Formation and Harlequin Formation Carluke Coals Carluke Tower Coal (Central Coalfield) Carlyle Beds Carmel Formation Carmel Group Carmel Head Gneiss Package Carmel Member Carmichael Burn Formation Carmichael Burn Group Carmichael Group Carmill Gas Coal Carn A'Chlamain Member Carn A'Ghaill Member Carn An Daimh Transitional Member Carn Brea Intrusion Carn Chuinneag - Inchbae Augen Gneiss Carn Chuinneag and Inchbae Augen Gneiss Carn Dubh Quartzite Member Carn Fadryn Quartz Microdiorite Carn Fadryn Suite Carn Gorm Pegmatite Suite Carn Limestone Member Carn Llidi Gabbro Carn Llidi Intrusion Carn Llundain Formation Carn Mairg Quartzite Carn Mairg Quartzite Formation Carn Marth Intrusion Carn Monadh Gravel Formation Carn Mor Sandstone Member Carn Odhar Granite Cupolas Carn Powell Facies Carn Powell Facies (Of Black Cock Beds) Carn Powell Member Carn Teikever Granite Carn Y Parc Formation [Obsolete Name And Code: Use CEI] Carn-Y-Parc Formation Carnallitic Marl Carnamuck Formation Carnaneigh Green Beds Carnbroe Marine Band (Central Coalfield) Carnduff Halite Carne Formation Carneal Plug [Obsolete Name And Code] Carnedd Iago Formation [Obsolete Name And Code: Use ALL] Carnedd Y Filiast Grit Member Carneddau Group (A) [Obsolete Name And Code] Carneddau Group (B) [Obsolete Name And Code] Carneddau Volcanic Formation Carneddol Rhyolitic Tuff Formation Carnethy And Hillend Group Carnethy And Hillend Volcanic Formation Carnethy Volcanic Member Carnhill Mugearite Carnmenellis Intrusion Carnmoney Plug Carnmore Sandstone Member Carnteel Formation [Obsolete Name And Code] Carpenters Farm Gravel Member Carperstane Sill Carr House Coal (West Yorkshire) Carr Member Carrack Formation Carraig Artair Member Carraun Shale Formation Carraun Shale Formation And Dergvone Shale Formation (Undifferentiated) Carreg Bica Mudstone Member Carreg Yr Imbill Dolerite Carreg-Y-Llam Microgranodiorite Intrusion Carrick O'Hara Formation Carrick Volcanic Formation Carrick-A-Rade Tuff [Obsolete Name And Code] Carrickabrackan Plug Carrickaness Sandstone Formation Carrickarade Vent Carrickarnan Complex Dolerites Carrickarnan Complex Granophyres Carrickateane Formation Carrickfergus Dyke [Obsolete Name And Code] Carrickmacsparrow Limestone Member Carrickmore Blackband Ironstone Carrickmore Dyke [Obsolete Name And Code] Carrickmore Granite Carrickmore Marine Band Carrickmore Sandstone Group Carrickmore Shale Member Carriteth Coal Carriteth Coal (Northumberland) Carrock Diabase Carrock Fell Complex Carrock Fell Complex [Mosedale Division] Carrock Gabbro-Microgranite Division Carrock Gabbro-Microgranite Intrusions Carrock Granophyre Carrock Series Carron Basalt Formation Carron Bridge Lava Member Carron Bridge Lavas Carron Formation Carron Sandstone Formation Carronrigg Smithy Coal (Drumbowie) Carscallon Sandstone Carse Clay Carse Clay (Undivided) Carse Clay Formation Carse Clay, Claret Formation Carse Of Gowrie Clay Member [Obsolete Name And Code: Use COGW] Carse Of Gowrie Member Carse Of Stirling Clay Member Carse's Vein Carsey Coal Carsluith Intrusion Carsphairn Conglomerate Member Carsphairn Rudite Formation Carstone Carstone (Isle Of Wight) [Obsolete Name And Code: Use MBSA] Carstone Formation Carstone Grit Carstone Grit Of The Langton Series Carstone Of The Isle Of Wight Cartlett Beds Carvichen Pluton Carw Formation Carway Fach Coal (South Wales) Carway Fawr Coal (South Wales) Cascade Beds Cascade Conglomerate Member Cascade Grits And Conglomerates Cascade Member Cassie Till Formation Cast Bed Cast Castle Formation Castell Coch Limestone [Obsolete Name and Code: Use CCL] Castell Coch Limestone Formation Castell Crug Porphyritic Microgranite Castell Formation Castell Limestone Formation Castell March Formation Castle Coal (Douglas) Castle Cornet Gneiss Castle Eden Fissure-fill Formation Castle Espie Group Castle Espie Limestone Formation Castle Formation Castle Haven Conglomerate Member Castle Head Dolerite Castle Hill Beds Castle Hill Flints Castle Hill Formation [Obsolete Name And Code: See GNF] Castle Hill Marls (One) Castle Hill Marls (Three) Castle Hill Marls (Two) Castle Hill Plug Castle Member Castle Of Cowie Member Castle Point Member Castle Point Pelite Formation Castle Rocks Vent Castle Sand and Gravel Member Castlecary Limestone Castledikes Sandstone Castledykes Sandstone Castleford Four Foot Coal Castlehead Coals Castlehead Lower Coal Castlehead Upper Coal Castleton Limestones [Obsolete Name And Code] Castletown Formation-Knockrushen Member Castletown Limestone Castlewood Limestone Caswell Bay Mudstone Formation Caswell Bay Oolite Formation [Obsolete Name And Code: Use GUO] Caswell Bay Oolite Formation And Caswell Bay Mudstone Formation (Undifferentiated) Cat Cleuch Formation Cat Gill Limestone Catcraig Limestone Catgill Wood Sand And Gravel Member Cathcart Sill Cathkin Braes Lava Member Caton Coal Grit Caton Shale Caton Shale Formation Caton Shale Member Caton Shales Catriona Formation Catriona Sequence Catsbit Limestone [Obsolete Name And Code: Use GL] Catshole Vein Coal (Pembrokeshire) Cattedown Member Catterline Conglomerate Formation Catton Coal Cauldon Low Limestone [Obsolete Name And Code] Causemountain Formation Causeway Tholeiite Member Cautley Mudstone Formation Cautley Mudstone Formation And Ashgill Formation (Undifferentiated) Cautley Volcanic Formation Cautley Volcanic Group (Ingham 1966) Cautley Volcanic Member Cave Deposits Cave Oolite Cave Oolite [Obsolete Name And Code: See ULL] Cave Oolite Member Cave Rock Member Cavenham Member Caw Formation Caw Mill Sandstone Caw Sandstone Formation Caw Tuffs Cawdale Member Cawdale Tuff Member Cawdor Group [Obsolete Name And Code: See Revision Data] Cawdor Limestone [Obsolete Name And Code: Use EYL] Cawk Cove Member Cawk Cove Sandstone Member Cawledge Bend Limestone Cayton Bay Formation Cayton Clay Formation Cayton Clay Formation And Cornbrash Formation (Undifferentiated) [Obsolete Code: Use CBCA] Cayton Gill Beds Cayton Gill Shell Bed Ceardaich Sand And Gravel Formation Cefn Bryn Shales Cefn Bryn Shales [Obsolete Name And Code: Use AVO] Cefn Coch Grit Member Cefn Coed Marine Band Cefn Coed Marine Band [Local Name: Use AGMB] Cefn Einion Formation Cefn Formation Cefn Glas Coal (South Wales) Cefn Goch Grit Cefn Gwyn Tuff Cefn Gwyn Tuff Member Cefn Hir Ashes. Cefn Hir Member Cefn Mawr Limestone Formation Cefn Rock Cefn-Y-Fedw Sandstone Cefn-y-fedw Sandstone Formation Cefn-Y-Fedw Sandstone Group Cefn-Y-Fedw Series Cefngarreg Sandstone Formation Cefnnantmel Member Cefnyrhendy Oolite Member Ceinwen And Llanddwyn Spilitic Formation Ceiriad Formation Ceiswin Mudstone Ceiswyn Beds Ceiswyn Formation Ceiswyn Formation And Nod Glas Formation (Undifferentiated) Celtic Palaeogene Minor Intrusion Suite Celyn Beds Cemaes Group Cement Fireclay Cement-Stone Cementstone Formation Cementstone Group Cementstone Group (A) [Obsolete Name And Code: See INV and BGN; CMNT Offshore] Cementstone Group (B) [Obsolete Name And Code: See INV and BGN; CMNT Offshore] Cemetery Beds [Obsolete Name And Code: Part Of KC] Cemetery Coal (Burnley) Cemlyn Bay Formation Cennen Beds Cennen Formation Cenomanian And Turonian Rocks (Undifferentiated) Cenomanian Greensand Cenomanian Limestone Cenomanian Sands Cenrhos Coal Cenrhos Coal (South Wales) Centr Central Anglesey Gneiss Complex Central Anglesey Shear Zone Central Anglesey Shear Zone And Berw Shear Zone (Undifferentiated) Central Cumbria (Albion) Glacigenic Subgroup Central Cumbria Drift Group [Obsolete Name And Code: Use CCGL Or CCAG] Central Cumbria Glacigenic Subgroup Central Grampian (Albion) Glacigenic Subgroup Central Grampian Drift Group Central Grampian Glacigenic Group Central Grampian Glacigenic Subgroup Central Group Central Highland Division Central Highland Migmatite Complex Central Highland Migmatites Central Intrusion (Rum Layered Suite) Central Intrusion (Rum Layered Suite) [Obsolete Code: Use RLC] Central Monzogranite Facies, Starav Intrusion Central Scotland Late Carboniferous Tholeiitic Dyke Swarm Central Starav Granite Central Wales Drift Centre 1 (Ardnamurchan Complex) Centre 1 Cone-Sheet-Swarm Centre 2 (Ardnamurchan Complex) Centre 2 Inner Basic Cone-Sheet-Swarm Centre 2 Outer Basic Cone-Sheet-Swarm Centre 3 (Ardnamurchan Complex) Centre 3 Basic Cone-Sheet-Swarm Centre 3 Layered Gabbro Lopolith Cephalaspis Sandstone-Cornstone Cephalopod Bed Cephalopod Limestone Cerdic Formation Cerdic Sand Cerdic Shore Ceres Thick Coal Cerig Formation Cerrig Brith Formation Cerrig Gwynion Grits Facies (Caban Conglomerate Formation) Cerrig Gwynion Grits Member Cerrigwynion Grits Cethings Sandstone Member Ceunant Slates Chaigley Limestone Member Chalbury Glauconitic Member Chale Clay Member Chalfield Oolite Formation Chalfield Oolite Formation and Corsham Limestone Formation (Undifferentiated) Chalk Group Chalk Marl [Obsolete Name And Code] Chalk Of Morvern Chalk Of Mull - Morvern [Obsolete Name And Code: See IHEB And GRIB] Chalk Rock Chalk Rock Formation Chalk Rock Member Chalk Silt Chalk With Flints (Lower Part) Chalk With Flints (Upper Part) Chalk Without Flints Chalk, Lower (Now Lower Chalk Formation) Chalk, Middle (Now Middle Chalk Formation) Chalk, Undivided, Upper (Now Upper Chalk Formation) Chalkey Coal (North Staffordshire) Chalky Boulder Clay Chalky Gravel Chalky Series Chalky Siltstone Member Chalky Till Chalmerston Coal (Dalmellington, South Ayrshire) Chama Sand Chama Sand Formation Chama Sand Member Chamber Rock Champfleurie Shale Chance Pennystone Marine Band Chance Pennystone Marine Band [Local Name: Use AGMB] Changue Formation Channel-Fill Deposits Channelbush Coal Channelbush Limestone Chanter Member Chanter Sandstone Member Chapel Den Conglomerate Formation [Obsolete Name And Code: See CATC] Chapel House Coal (Northumberland) Chapel House Limestone Formation Chapel Point Limestone [Obsolete Name And Code: Use MAHO] Chapelburn Coal Chapelgreen Coal Chapelhall Lower Fireclay Chapelhall Upper Fireclay Chapelknowe Till Formation Chapelton Burn Member Charlbury Limestone Member Charles Coal (South Staffordshire) Charles Hill Volcanic Beds Charles Hill Volcanic Member Charles Marine Band Charles Marine Band [Local Name: Use AGMB] Charlestown Green Limestone Charlestown Main Limestone [Obsolete Name And Code: Use BLLS] Charlestown Station Limestone [Obsolete Name And Code: Use: HUR] Charlotte Coal (South Lancashire) Charlotte Mine Charlotte Mine Coal Charmandean Flint Charmouth Mudstone Formation Charmouth Mudstone Formation And Dyrham Formation (Undifferentiated) Charmouth Mudstone Formation, Dyrham Formation And Marlstone Rock Formation (Undifferentiated) Charmouth Mudstone Formation, Dyrham Formation, Marlstone Rock Formation And Whitby Mudstone Formation (Undifferentiated) Charnian Supergroup Charnwood Lodge Agglomerate Member Charnwood Lodge Member Charnwood Lodge Volcanic Formation Chase Coals (South Staffordshire) Chatburn Limestone Formation Chatburn Limestone Formation And Thornton Limestone Member (Undifferentiated) Chatburn Limestone Group Chatburn Limestone Group And Worston Shale Group (Undifferentiated) Chatelherault Sandstone Chatsworth Grit Chatwall Flags Chatwall Flags And Chatwall Sandstone (Undifferentiated) Chatwall Sandstone Chavery Coal (Derbyshire And South Yorkshire) Chavery Coal (Lower Leaf) Chavery Coal (Upper Leaf) Cheadle Breccias Cheddar Limestone Formation Cheddar Limestone Member Cheddar Oolite Formation Cheddar Oolite Member Cheddleton Sandstones Chee Tor Limestone Member Chee Tor Rock Chee Tor Rock Member Cheese Bay Sill Cheeveley Coal (Northumberland) [Local Code: Use BPLY] Cheevely Chelford Formation Chelford Sand Formation Chelsfield Gravel Chelsfield Gravel Formation Cheltenham Limestone Member Cheltenham Sand and Gravel Cheltenham Sands Chemical deposits Chemiss Coal (Fife) Chemiss Den Marine Bed Chemnitzia Oolite/Limestones Cheney Longville Flags Cheney Longville Formation Chenier deposits Chercombe Bridge Limestone Formation Chert And Black Shale With Sandstone Bands [Within HBS] Chert Beds Chert Beds (Of Devon) [Obsolete Name And Code] Chert Beds (Of Flint) [Obsolete Name And Code] Chert Beds (Of West Cumberland) Chert Bodies In Crocaden Sandstone Formation Chert Formation Chert Series Cherty Beds Cherty Rock Of Stotfield Cherty Series Cherty Shale (Llangollen) [Obsolete Name And Code: See CFS] Cherwerfri Formation Cheshire - North Wales Catchments Subgroup Cheshire Coal (South Lancashire) Chester Formation Chester Pebble Beds Formation [Obsolete Name And Code Use: CHES] Chester'S Quarry Sill Cheviot Dyke Swarm Cheviot Glacigenic Subgroup Cheviot Lavas [Obsolete Name And Code: Use CHEV] Cheviot Pluton Cheviot Volcanic Formation Cheviot Volcanic Group Cheviot Volcanic Series Chevithorne Breccias [Obsolete Name And Code] Chick Coal (Bristol Area) Chicksgrove Limestone Member Chicksgrove Member Chief Limestone Group [Obsolete Name And Code: See GSCL And AG] Chiefswood Vent Child Okeford Sand Member Chillesford Beds Chillesford Church Sand Member Chillesford Clay Chillesford Clay Member Chillesford Member Chillesford Sand Chillesford Sand Member Chilmark Member Chilmark Oolite Member Chilton Stone China Coal (Falkirk; Central Coalfield) China Coal (Lancashire) China Mine China Mine Coal China Mine Rock China Rock Chinastones Chipping Norton Formation Chipping Norton Limestone Chipping Norton Limestone Formation Chipping Norton Limestone Formation And Rutland Formation (Undifferentiated) Chirbury Formation Chirbury Group Chirbury Series Chirdon No.1 Coal Chirdon No.1 Limestone Chirdon No.2 Coal Chirdon No.2 Limestone Chlorite Sands And Sandstones Chloritic Marl Chloritic Sands And Sandstones Chonetes Polita Limestone Chonetes Shale Chopping Victoria Coal Choppington Brockwell Choppington Brookwell Coal Chorleywood Gravel Formation Christchurch Member Christy's Walls Coal Chudleigh Group Chudleigh Knighton Clay And Sand Member Chudleigh Limestone Church Bay Tuff Formation Church Bay Tuffs [Obsolete See: POTRF] Church Bay Tuffs And Skerries Grits (Undifferentiated) Church Door Buttress Breccias Church Hill Dyke [Obsolete Name And Code] Churchway Coal (Forest Of Dean) Churston Member Churwell Thick Coal (West Yorkshire) Churwell Thin Coal (West Yorkshire) Chwarel Goch Facies [In Ystrad Meurig Grits Formation] Chwarelau Coal (North Wales) Chwefri Formation Ciger Coal Rock Cil-yr-ychen Limestone [Obsolete Name And Code: Use DWL] Cilan Formation Cilan Grits Cilan Grits (In Part) Ciliau Formation Cille Coals (Undifferentiated) (South Wales) Cille No.1 Coal (South Wales) Cille No.2 Coal (South Wales) Cille No.3 Coal (South Wales) Cille No.5 Coal (South Wales) Cilmaenllwyd Coal (South Wales) Cinder Bed Cinder Beds [Obsolete Name And Code] Cinder Bench Coal (South Staffordshire) Cinder Coal (South Staffordshire) Cinderford Formation Cinderford Member Cinderhill Main Coal (Nottingham And Derby) Cistern Coal City Sandstone Member Clach Alasdair Conglomerate Member Clach Leatad Pluton Clachaig Semipelite And Psammite Formation Clachghlas Granite Clachnaben Granite (Mount Battock Pluton) Clachtoll Formation Clackmannan Blackband Clackmannan Diamond Coal Clackmannan Forty Inch Coal Clackmannan Four Foot Coal Clackmannan Group Clackmannan Jewel Coal Clackmannan Lower Five-Foot Coal (Clackmannan) Clackmannan Musselband Coal Clackmannan Nine Foot Coal (Clackmannan) Clackmannan Two Foot Coal Clackmannan Upper Five Foot Coal (Clackmannan) Clackmannan Yard Coal Claddens Dyke Clady Limestone Member Claerwen Group Clair Group Claisfearn Semipelite Clanyard Bay Formation Clanyard Formation Clap Round Facies Formation Claragh Sandstone Formation Claragh Sandstone Group Clarborough Beds Clarborough Formation Clarborough Member Claret Beds Claret Clay Member Clashbenny Formation [Obsolete Name And Code: Use GEF] Clashindarroch Formation Clashnoir Semipelite Formation Clattering Band Clauchland Sill (South Arran) Claudy Formation Claughton Flag Series Claughton Flags Claughton Formation Claughton Member Claughton Moor Shales Claughton Moor Siltstone Member Claughton Moor Siltstones Clava Lodge Clay Member Clava Mudstone Member Clava Sand Member [Obsolete Name And Code: Use DROY] Clava Shelly Clay Member [Obsolete Name And Code: Use CLOCL] Clava Shelly Formation Clava Shelly Till Clava Shelly Till Member [Obsolete Name And Code: Use CUTI] Clavellata Beds Clavellata Beds Formation Clavellata Formation Claxby Beds [Obsolete Name And Code: Use CI] Claxby Ironstone Claxby Ironstone Formation Claxby Ironstone Formation and Hundleby Clay Member (Undifferentiated) Claxby Ironstone Formation And Tealby Formation (Undifferentiated) Claxby Ironstone Formation, Tealby Formation And Roach Formation (Undifferentiated) Clay Coal Clay Coal (South Wales) Clay Coal [South Wales Coalfield] Clay Cross Marine Band Clay Cross Marine Band [Local Name: Use VDMB] Clay Cross Soft Coal (Derbyshire) Clay In Upper Lias Clay With Flints Clay-with-flints Clay-With-Flints Clay-with-flints Formation Clayband Ironstone Formation Clayband Ironstone Measures Clayband Ironstone Member Claygate Beds Claygate Member Claygate Member And London Clay Formation (Undifferentiated) Clayknowes Coal (Lothian) Claymore Sandstone Member Claypole Limestone Claypole Limestones Bed Clays-Of-The-Cornbrash Clayton Marine Band Clayton Marine Band [Local Name: Use SOMB] Claywood Ironstone Cleatham Limestone Cleatham Limestone Member Cleaver Bank Formation Cleaverbank Formation Clee Formation Clee Group (See Clee Formation) Clee Group [Obsolete Name And Code: See WBK] Clee Hill Microgabbro Sill-swarm Clee Sandstone Formation Cleeve Cloud Member Cleeve Hill Beds Cleland Roughband Ironstone Clement Coal (South Wales) Clenchers Mill Member Clennery Scar Vein Clent Breccias [Obsolete Name And Code: See CLT] Clent Formation Clent Formation And Enville Formation (Undifferentiated) Clent Formation And Haffield Breccia Formation (Undifferentiated) Clent Group Clent Hills Breccia Clerkhill Appinite Suite Cleveland - Armathwaite Dyke. Cleveland Dyke On BGS Published Maps Cleveland Ironstone Formation Cleveland Ironstone Series Cleveland Sand Formation Cleveland, Cockfield And Armathwaite Dyke Cleveland-Armathwaite-Barassie-Stevenson-Great Cumbrae-Toward Point Dyke Cleveleys Mudstone Member Clicker Tor Picrite Intrusion Cliff Coal (Milford, South Wales) Cliff End Member Cliff Member Cliff Vein Cliffe Beds Cliffe Flints Cliffe Hardground Cliffe Marls (One) Cliffe Marls (Two) Clifford's Mesne Sandstone Cliffs End Greensand Bed Clift Hills 'Division' Clift Hills Phyllite Clift Hills Phyllite Group [Obsolete Code: Use CLHI] Clift Hills Phyllitic 'Group' Clift Hills Phyllitic Formation Clifton Down Group [Obsolete Name And Code: See PEMB] Clifton Down Group And Hotwells Group (Undifferentiated) Clifton Down Limestone Formation Clifton Down Mudstone Formation Clifton Rock Cligga Head Intrusion Climpy Gas Coal (Forth Area) Clinterty Pluton Clintsfield Coal Clintsfield Grit Clippens Peat Formation Clisiophyllum Multiseptatum Band Clitheroe Limestone "Series" [Obsolete Name And Code: Use CLL] Clitheroe Limestone Formation Clitheroe Limestone Formation (Knoll-Reef) Clitheroe Limestone Formation And Hodder Mudstone Formation (Undifferentiated) Clitheroe Limestone Series Cloalcleugh Coal Cloberhill Blackband Ironstone Cloberhill Coal Clochnahill Group [Obsolete Name And Code] Clock's Cleuch Coal Clod Coal (Coalbrookdale) Clod Coal (Leicestershire, South Derbyshire, Nottingham And Derby) Clod Coal (North Staffordshire) Clogau Formation Clogau Shales Cloghan Green Beds Cloghan Hill Limestone Member Cloghany Limestone Member Cloghastucan Chalk Formation Cloghastucan Chalk Member Clogher Valley Anhydrite [Obsolete Name And Code] Clogher Valley Formation Clogherny Member Clogherny Member [Duplicate Code: Use CGHY] Cloghfin Sponge Formation Clogwyn Gottal Tuff Clogwyn Volcanic Group Clonelly Sandstone Group [Obsolete Name And Code: Use MMS] Clonmass Formation Close Hill Siltstone Close Hill Siltstone Member Closeburn Limestone Formation Cloud Hill Dolomite Formation Cloud Hill Dolostone Formation Cloud Wood Member Cloughfin Sponge Bed Member Cloughton Formation Clousden Hill Coal (Northumberland) Clousta Volcanic Member Clouston Hill Coal Clovelly Court Shales Clown Coal Clown Marine Band Clowne Coal (Nottingham, Derby And South Yorkshire) Clowne Marine Band Cluanie Granodiorite Cluanie Suite Clun Forest Formation Clunch Clay Clunch Clay And Shale Clunch Coal (Coalbrookdale) Clune Fish Bed Clunes Complex Clwyd Group (Knoll Reef) Clwyd Limestone Group Clwyd Valley Formation Clydach Beds Clydach Halt Member Clydach Valley Subgroup Clyde Beds Clyde Catchments Subgroup Clyde Clay Formation Clyde Plateau Lavas Clyde Plateau Subsuite (Of MCLFS) Clyde Plateau Subsuite [Of SSDPV] Clyde Plateau Volcanic Formation Clyde Plateau Volcanic Group Clyde Plateau Volcanic Rocks Clyde Sandstone Formation Clyde Valley Formation Clydebank Clay Formation Clynekirkton Sandstone Formation Clynekirkton Sandstone Member [Obsolete Name And Code: See ACHSD] Clynelish Quarry Sandstone Member Clypeus Grit Clypeus Grit And White Oolite Clypeus Grit Member Clyst Sands [Obsolete Name And Code: See DAS] Clyst St Lawrence Formation Clyth Formation Clyth Subgroup Clyth Subgroup (Helman Head Beds) [Obsolete Name And Code: See CLYTH] Cnoc An Fhithich Banded Semipelite Formation Cnoc An Fhithich Banded Semipelite Formation And Drumchastle Pale Limestone Formation (Undifferentiated) Cnoc Bhrostan Member Cnoc Creagach Member Cnoc Donn Phyllites, Quartzites, Limestone [Obsolete Name And Code: Use DADQ] Cnoc Donn Quartzite Formation Cnoc Donn Slate [Obsolete Name And Code: Use DADQ] Cnoc Fyrish Conglomerate Cnoc Fyrish Conglomerate Formation Cnoc Na Sroine Quartz-Syenite Cnoc Nan Cuilean Intrusion Coa Sandstone Member Coagh Conglomerate Member Coal "Series" [Obsolete Name And Code] Coal A Coal Group, Upper (Durham) [Obsolete Name And Code] Coal Marker Member Coal Measures Coal Measures Group Coal Measures Group (Scotland) Coal Measures Group And Warwickshire Group (Undifferentiated) Coal Measures Supergroup Coal Measures, Upper (E & W) Coal Mining Coal Mosie (Clackmannan) Coal Pit Formation Coal Unit Coalbrookdale Formation Coalbrookdale Formation. Coalburn Dross Coal Coalburn Ell Coal Coalburn Nine Foot Coal Coalburn Six Foot Coal Coalburn Smithy And Dross Coals Coalburn Smithy Coal Coalcleugh Shell Band Coalisland Marine Band Coalisland Marine Band [Local Name: Use SBMB] Coalpit Bay Mudstone Formation Coalport Formation [Obsolete Name And Code: See HA] Coalsnaughton Main Coal (Clackmannan) Coaly Unit Coalypath Coal Coarse Gravel And Sand Coastal barrier deposits Coastal Deposits And Glaciofluvial Deposits Coastal Deposits Of Banffshire Coastal zone deposits Coastguard Station Vent Coat Walls Mudstone Coat Walls Mudstone Member [Obsolete Name And Code: See KRM] Coat Walls Mudstones Coatbridge Balmoral Coal (Central Coalfield) Coatbridge Musselband Coatbridge Musselband Coal (Central Coalfield) Coatbridge Musselband Ironstone Coatyards Coal (Northumberland) Coatyards Limestone Coatyards Limestone [Duplicate Code: Use CYLM] Cobble Coal (Cheadle) Cobden Sandstone Cobham Common, Foxhills And Easthamstead Members Cobham Lignite Bed Cochno Lava Member Cochno Lavas Cock Burn Calcareous Schist Formation Cock Cairn Granite (Mount Battock Pluton) Cock Coal (Bristol Area) Cock Rig Formation Cockburn Formation Cockburns Law Intrusion Cocker Combe Tuff Cockerel Gravel Member Cockermouth Breccia-Conglomerate Cockermouth Lavas Cockermouth Lavas Formation Cockermouth Volcanic Formation Cockhill Limestone Cockhill Marine Band Cockington Beds Cockleshell Coal Cockleshell Coal (South Yorkshire And Derbyshire) Cockleshell Limestone Cocklett Scar Flags Cocklett Scar Sandstone Cocklett Scar Sandstone Member Cocklett Scar Sandstones Member Cockley Beck Tuff Member Cockley How Tuff Member Cockley Pike Member Cockley Pike Sandstone Member Cockloft Coal (South Lancashire) Cockshead Coal (North Staffordshire) Codden Hill Beds Codden Hill Chert Codden Hill Chert Formation Codden Hill Group Coddington Till Coddington Till Formation Coed Caedyrys Coal (South Wales) Coed Duon Volcanic Formation Coed Ffyddlwn Formation Coed Wenallt Beds Coed-Y-Glyn Sill Coed-yr-allt Formation [Obsolete Name And Code: See HA] Coedana Complex Coedana Granite Coeden Formation Coetmor Sandstone Member Coilacreich Intrusion Coire An Iubhair Formation Coire Cheap Formation Coire Daingean Semipelite Formation Coire Dubh Breccias Coire Eilde Tuffs Coire Na Circe Formation Coire Na Rainich Hybrid Ring-Dyke Coire Na Rainich Peridotite Raft Coire Nan Easan Tuffs Coire nan Laogh Semipelite Formation Coire Riabhach Phosphatic Formation Coire Uaigneich Granite (Cuillin Centre) Coke Coal (Bristol Area) Cokeyard Coal (Ayrshire) Coking Coal Coking Coal (Bristol Area) Coking Coal (Somerset) Col-Bhein Formation Colchester Formation Cold Ash Gravel Coldbeck Limestone Formation Coldingham Beds Coldingham Formation Coldwell Beds Coldwell Beds And Horton Flags [Obsolete Name And Code: See CDW And HNF] Coldwell Formation Coleby Mudstone Formation Coleby Mudstone Formation (Part) Coleby Mudstones [Obsolete Name And Code: Use CHAM Or WHM] Coleby Mudstones Formation Coleford Formation Coleford High Delf Coal (Forest Of Dean) Coleford Member Colgate Sandstone Colinburn Coal (Central Coalfield) Colinswell Marine Band Coll-Tiree Swarm Colla Firth 'Group' [Obsolete Code: Use COLA] Colla Firth Formation Colla Firth Permeation And Injection Belt Collapsed Building Collering Sandstone Collieston Formation Collin Glen Formation Collingham Head Collinwell Sands Formation Collinwell Sands Member Colluvium Collyhurst Sandstone Formation Collyweston Slate Colne Valley Deposits Colonsay Group Colpatie Coal Colsay Sandstone Member Colsterdale Limestone Colsterdale Marine Beds Colwall Gelifluctate Member Colwell Bay Member Colwell Limestone Colwick Formation Colwick Member Comb Coal Comb Coal (South Yorkshire And Derby) Combe Deposits Combe Down Oolite Combe Down Oolite Member Combe Downs Member Combe Formation Combe Martin Beach Limestone Combe Martin Slates Member Combe Member Combe Mudstone Formation Combe Shale Combe Shale Formation [Obsolete Name And Code: Use CMMU] Combe Wood Chert [Obsolete Name And Code: See COH] Comber Andesite Member Combined Cheltenham And Stanway Hill Formations Combined Cheltenham Sand And Fan Gravel Combined Oolite Marl And Upper Freestone Comin Coch Formation Comley Andesites [Obsolete Name And Code] Comley Breccia Bed Comley Limestone Formation Comley Rocks (Undifferentiated) Comley Sandstone Group [Obsolete Name And Code: See LCSS And UCSS] Comley Sandstone Series Commodore Formation Common Flat Limestone Compact Limestones Complex landslide deposits Complex Subsided Ground Compstall Two Feet Comptoni Bed Comrie Three Foot Coal Comrie Two Foot Coal Con Tom Member Conachair Granite Pluton Conan A Sequence Conan B Sequence Conan Formation Conan Sequence Conan Subsequence Conchar Formation Conchar Subsequence Concretionary Limestone Concretionary Limestone Formation Concretionary Limestone Member Concretionary Sandstone Series Concretionary Sandstones Conduit Conduit Excavation Coney Weston Sand And Gravel Member Coneypark Coxrod Coal Coneypark Lower Drumgray Coal Confinis Flags Confinis Flags Formation Confinis Formation Confusion Member Conglass Conglomerate Formation [Obsolete Name: See CGLS And Revisions] Conglass Sandstone Formation Congleton Sand Conglomerate "Series" [Obsolete Name And Code: Use SVG] Conglomerate And Grit (Uriconian Group) [Obsolete Name And Code: Part Of UO] Conglomerate Beds Conglomerate Of Islay-Jura Succession [Obsolete Name And Code] Conglomerates Of Heavitree Conglomerates Of Morven Conglomeratic 'Division' Of Corsewell Group Congo Coal (Dungannon) Coniacian To Campanian Rocks (Undifferentiated) Conisbrough Group Coniston Grit Formation Coniston Grits Coniston Grits And Studfold Sandstone [Obsolete Name And Code] Coniston Group Coniston Limestone Coniston Limestone Formation Coniston Limestone Group [Obsolete Name And Code: Use DNT] Coniston Limestone Series Coniston Subgroup Conksbury Bridge Basalt Conksbury Bridge Lava Conksbury Bridge Lava Member Connswater Marl Formation Conrig Formation Constantine Bay Slate Formation Contorta Shales Convoy Group [Obsolete Name And Code] Conway Rhyolite Formation Conwy Castle Grit Member Conwy Mudstones Formation Conwy Rhyolite Formation Conwy Valley Formation Conybeare Group Conybeare Group [Duplicate Entry: Use CNYB] Cook Formation Cook Sub-Unit Cookstown Limestone Coolbeg Breccia Formation Coolcran Conglomerate Member Cooldaragh Formation Coombe Coal (Nottingham And Derby) Coombe deposits Coombes Coal (Nottingham And Derby) Cooper Eye Coal (Northumberland) Coplow Knoll Series [Obsolete Name And Code: Use COPL] Coplow Limestone Member Coplow Shales [Obsolete Name And Code] Copney Pillow-Lava Formation Copper Mine Formation Coppy Hill Limestone Coprolite Bed Copster Green Sandstone Coquet Valley Formation Cora-Bheinn Member Coracle Sandstone Member Coral Bed Coral Knoll (In Kirton Cementstones) Coral Rag Coral Rag Formation (Southern England) Coral Rag Member (Cleveland Basin) Coralea Phyllite Member Corallian Corallian Beds Corallian Beds (Skye) Corallian Formation Corallian Formation [Offshore Areas] Corallian Group Corallian Limestone Corallian Rocks Coralliferous Group Coralliferous Series Coralline Crag Coralline Crag Formation Coralline Knolls Of Patch-Reef Type Coralline Limestone Coralline Oolite Coralline Oolite Formation Corbar Grit Corbie Coal (Lothian) Corbie Craig Coal Corbie Craig Coal (Lothian) Corbie's Tongue Conglomerate Formation Corbiehall Coals Corbridge Limestone Corby Hall Intrusion Corbyn's Head Member Corfe Member Corgarff Limestone Member Corinacy Pelite Member Cork Rock Corkerhill Clayband Ironstone Corkey Rocks Plug Corkhill Sandstone Member Corley Beds [Obsolete Name And Code: See CRSA] Corley Conglomerate [Obsolete Name And Code: See CRSA] Corley Sandstone Cormorant Formation Corn Brash Cornbrash Cornbrash Formation Cornbrash Formation And Cayton Clay Formation (Undifferentiated) Cornbrash Formation And Cayton Shale Formation [Undifferentiated] Cornbrash Limestone Member Cornbrook Sandstone Cornbrook Sandstone Formation Corncockle Sandstone Formation Cornelly Oolite Formation Cornet Limestone Cornstone Beds Cornstone Beds (Of Inverness, Nairn, Banff) Cornstone Beds (Of Stirling Area) [Obsolete Name: See KNW] Cornstone Formation Cornstone-Bearing Beds Cornubian Catchments Subgroup Corodale Gneiss Coronation Coal (Fife) Coronea Formation Corral Coal (Dailly) Corrennie Intrusion Corrie Burn Horneblende Schist Corrie Lava Member Corrie Lavas Corrie Limestone Corrie Sandstone Corrie Sandstone And Brodick And Lamlash Beds (Undifferentiated) Corrieyairack Granitic Complex Corrieyairack Pluton Corrieyairack Subgroup Corrieyairack Subgroup And Glen Banchor Succession (Undifferentiated) Corrour Granulite Corry Member Corrycroar Beds Corrydon Psammite Member Corryhabbie Quartzite Formation Corsankell Limestone Corse Diamicton Formation Corse Diamicton Member Corse Member Corse Of Balloch Member Corseclays Sandstone Formation Corsend Gelifluctate Bed Corsend Member, Kirkhill Formation Corsewall (Point) Conglomerate Corsewall Formation Corsewall Group Corsewall Point Conglomerate Member Corsham Coral Bed Corsham Limestone Formation Corsham Member Corston Coal (Bristol Area) Corstorphine Sill Corton Beds Corton Formation [Duplicate Code: See CORF] Corton Formation [Obsolete Name And Code: Use HPGL] Corton Formation And Lowestoft Formation (Undifferentiated) [Obsolete Name And Code: Use HPLO] Corton Sand Member Corton Sands Corton Till Corton Till Member Corton Woods Sand And Gravel Member Corton Woods Sand And Gravels Corton Woods Sands And Gravels Corvanaghan Formation Corvanaghan Formation [Obsolete Code: Use CORV] Corvie Group Corwen Grit Corwen Grit Member Coryton Breccias Cosham Flint Cosheston Beds Cosheston Subgroup Cot Castle Blackband Ironstone Cot Castle Clayband Cot Castle Shell Bed Cotehele Formation Cotehele Sandstone Formation [Obsolete Name And Code: Use SME] Cotes Bottom Flint Cotgrave Place Skerry Cotgrave Sandstone Member Cotgrave Skerry Cotgrave Skerry (Member) Cotgrave Skerry Member Cothall Limestone Member Cotham Beds Cotham Member Cotham Member And Westbury Formation (Undifferentiated) [Obsolete: Use WBCT] Cotswold Sands Cotswold Slates Cotteswold Sands [Obsolete Name And Code: Use BDS] Cottonshope Basalts Cottonshope Lavas Cottonshope Volcanic Formation Coulins Burn Striped Member Coull Grit Formation Counter Head Formation Counter Head Siltstone Formation Coupland Sike Limestone Member Cove Harbour Sandstone Cove Limestone Member Cove Lower Limestone Cove Lower Marine Band Cove Oil Shale Bed Cove Upper Limestone Cove Upper Marine Band Cove Vein Covehithe Clay Member Coventry Sandstone Coventry Sandstone (Middle Part) Coventry Sandstone Formation [Obsolete Name And Code: See ASY] Covered Structure Coversands Cow Rock Conglomerate Member Cowdenbeath Ell Coal Cowdenbeath Five Foot Coal Cowdenbeath Jewel Coal Cowdenbeath Seven Foot Coal Cowdenbeath Two Foot Coal Cowdenbeath Wee Coal Cowglen Limestone Cowglen Rough Coal Cowglen Rough Coal (Glasgow) Cowglen Sclutty Coal Cowglen Sclutty Coal (Glasgow) Cowglen Smithy Coal (Glasgow) Cowglen Stinking Coal Cowglen Stinking Coal (Glasgow) Cowhythe Gneiss [Obsolete Name And Code: See CWPS] Cowhythe Psammite Formation Cowie Formation Cowie Harbour Conglomerate Member Cowie Harbour Fish-Bed [Obsolete Name And Code: Use CHSI] Cowie Harbour Siltstone Member Cowie Rock Cowie Sandstone Formation Cowlairs Sandstone Cowleaze Chine Member Cowleigh Park Beds Cowleigh Park Formation Cowleigh Park Formation [Obsolete Code: Use CPA] Cowpits Five Foot Coal (Lothian) Coyles Of Muick Intrusion Coylumbridge Formation Crabtree Coal (North Staffordshire And Cheadle) Crackers Coal Crackers Coal (Lancashire) Crackers Group Crackers Mine Crackington Formation Crackington Formation (Pars) Crackington Formation And Bude Formation (Undifferentiated) Crackington Measures Cracoe Limestone Formation Cradley Silts Bed Cradley Valley Formation Crafnant Volcanic Group [Obsolete Name And Code: See SV] Crag Crag Group Crag Group And Bytham Sand And Gravel Formation (Undifferentiated) Crag Hill Beds Crag Hill Limestone Crag Hill Limestone Member Crag Limestone Craghouse Tuff Member Craghouse Tuffs Member Crags Vent Craid A'Bhlair Formation Craig An Daimh Gravel Formation Craig An Daimh Member Craig Cau Formation Craig Coals Craig Hen-Gae Member Craig Hill Breccia Formation Craig of Monievreckie Conglomerate Formation Craig Rofft Sandstone Member Craig Y Ffynnon Formation Craig Y Lam Formation Craig Y Lam Group Craig Y Llam Formation Craig Y Llam Group Craig Yr Odyn Mudstone Member Craig-y-cwm Formation Craig-Y-Ffynnon Formation Craig-Y-Gaer Coral Bed Craig-Y-Glyn Formation Craig-Y-Glyn Group Craig-Y-Llam Group [Obsolete Name And Code: See CYLF] Craiganee Formation Craigavad Sandstone Formation Craigballyharkey Tonalite Craigbardahessiagh Granodiorite Craigbreck Conglomerate Bed Craigburn Limestone [Obsolete Name And Code: Use HHLS] Craigburn Shell Bed Craigcluggan Plug Craigdouffie Lava Member Craigdouffie Lavas Craigenbush Limestone Craigenglen Beds Craigenhill Limestone Craigentimpin Lava Member Craigentimpin Lavas Craighall Conglomerate Formation Craighead Limestone Craighead Limestone Formation Craighead Volcanic Formation Craighill Sandstone Group [Obsolete Name And Code: Use FELL] Craigie Coal (Dailly) Craigies Lava Member Craigievar Formation Craigleith Sandstone Craigleith Sill Craigmaddie Muir Sandstone Member Craigmaddie Muir Sandstones Craigmaddie Sandstone Formation Craigmaddie Sandstones Craigmalloch Formation Craigmark Blackband Ironstone Craigmuschat Sill Craignish Phyllite Craignish Phyllite Formation Craignook Coals (Midgeholm) Craignook Sandstone Craigrory Sandstone Bed Craigs Breccia Craigs Breccias Craigskelly Conglomerate Craithie Point Group Crammel Linn Sandstone Cramond Island Sill Crane Dyke Member Crane Formation Cranford Limestone Crank Coal (North Wales) Cranmore Member Crapwell Coppice Limestone Crathes Pluton Crathie Point Calc-Silicate Member Crathie Point Calcareous Flag Member Crathie Schist And Limestone Formation Crathie Sheets Craven Grit Craven Group Cravenoceras Brandoni Marine Band Cravenoceras Brandoni Marine Band [Obsolete Code: Use E1B1] Cravenoceras cowlingense Marine Band Cravenoceras Cowlingense Marine Band [Obsolete Code: Use E2A1] Cravenoceras Gressinghamense Marine Band Cravenoceras Gressinghamense Marine Band [Obsolete Code: Use E2A2A] Cravenoceras leion Marine Band Cravenoceras Leion Marine Band [Obsolete Code: Use E1A1] Cravenoceras Malhamense Marine Band Cravenoceras Malhamense Marine Band [Obsolete Code: Use E1C1] Cravenoceratoides Edalensis Marine Band Cravenoceratoides Edalensis Marine Band [Obsolete Code: Use E2B1] Cravenoceratoides Nitidus Marine Band Cravenoceratoides Nitidus Marine Band [Obsolete Code: Use E2B2] Cravenoceratoides Nititoides Marine Band Cravenoceratoides Nititoides Marine Band [Obsolete Code: Use E2B3] Crawford Group Crawford Group And Moffat Shale Group (Undifferentiated) Crawfordjohn Dyke Crawfordjohn Essexite Crawfordston Coal (Ayrshire) Crawley Formation Crawley Member Crawshaw Sandstone Crawstone Coal (Coalbrookdale) Crawton Group [Obsolete Name And Code: See Dunnottar-Crawton Group] Crawton Volcanic Formation Crayford Brickearth Crayford Brickearth Formation Crayford Silt Formation [Obsolete Name and Code: Use CFSI] Crayford Silt Member Creag An Loin Psammite Formation Creag Buidhe Semipelite Formation Creag Dhubh Psammite Formation Creag Innich Sandstone Formation Creag Leacach Quartzite Creag Leacach Quartzite Formation Creag Liath Pelite Member Creag Liath Psammite Formation Creag Meagaidh Psammite Formation Creag Mhor Conglomerate Creag Mhor Conglomerate Member Creag Mhor Conglomerates Creag Mhor Conglomerates (Formation) Creag Mhor Limestone Member Creag Na Sanais Semipelite Formation Creag Nam Ban Psammite Formation Creag Nan Gall Granodiorite Creag Strollamus Granite (Skye Eastern Red Hills Centre: Phase 4) Creagan Formation Creagan Group Creagan Loisgte Member Crease Limestone [Obsolete Name And Code: Use GUO] Crease Limestone And Whitehead Limestone (Undifferentiated) Crease Limestone Formation Crediton Beds Crediton Breccia Formation Crediton Breccias [Obsolete Code: Use CRBR] Crediton Conglomerates Creech Barrow Limestone Member Creech Brick Clay Member Creedy Park Sandstone Formation Creekmoor Clay Member Creekmoor Sand Member Creepie Coal (Sanquhar) Creeslough Formation Creeslough Formation And Ards Black Schist (Undifferentiated) Creetown Granite Creg Agneash Sandstone Formation Cregennen Formation Creggan Chalk Formation Creggan Chalk Member Creggan Moar Mudstone Formation Creigiau Brithion Formation Crendon Sand Creran Bridge Quartzite Formation Creran Flags Formation Cressbrook Dale Lava Cressbrook Dale Lava Member Cretaceous Rocks Cretaceous Rocks (Undifferentiated) Crewi Formation Crewyn Formation Cribarth Formation Cribbwr Fach Coal (South Wales) Cribbwr Fach Coal [South Wales Coalfield] Cribbwr Fawr Coal (South Wales) Cribbwr Fawr Coal [South Wales Coalfield] Cribyn Ddu Member Crichope Sandstone Member [Obsolete Name And Code: Use TWN] Crickley Limestone And Crickley Oncolite Crickley Member Crickmail Limestone [Obsolete Name And Code: Use OHL] Crieve Hill Oolite [Obsolete Name And Code] Criffel Granite, Criffel And Dalbeattie (Granite) Mass Criffel-Dalbeattie Granodiorite Complex Criffel-Dalbeattie Pluton Crigglestone Rock Crinan Grit Crinan Grit Formation Crinan Grits Crinan Subgroup Crinan Subgroup And Tayvallich Subgroup (Undifferentiated) Crinan Subgroup Caenlochan Schist Cringate Interbasaltic Beds Cringate Volcaniclastic Member Criniod Grit Crinkle Member Crinkle Tuff Member Crinkle Tuffs Crinoid Bed Crinoid Grit Member Croaghgarrow Formation Croaghubrid Dark Schists Croaghubrid Pelite Formation Crocadon Formation [Obsolete Name And Code: Use SME] Crockanaver Limestone Member Crockey Hill Esker Member Crocknagargan Beds [Obsolete Name And Code] Croft Member Crofthead Coal Crofthead Slatyband Ironstone Crofts End Marine Band Crofts End Marine Band [Local Name: Use AGMB] Crogenen Slates Croisaphuill Formation Croisaphuill Group Crom Psammite Formation Cromar Pluton Cromarty Fish Bed Cromarty Sand Member Cromarty Sandstone Member Cromdale Hills Quartzite Member Cromer Diamicton Cromer Forest Bed Series Cromer Forest-bed Formation Cromer Knoll Group Cromer Member Cromer Till (Lowest Member) Cromer Till (Sand Member) [Obsolete Name And Code: See Revision Note] Cromer Till (Upper Member) [Obsolete Name And Code: Meaning Uncertain] Cromer Till [Obsolete Name And Code: See Revision Note] Cromerian Complex Interglacial 2 To Elsterian Deposits, Undifferentiated (Offshore) Cromerian Complex Interglacial 2 To Elsterian Mud And Sand, Interbedded (Offshore) Cromerian Complex Interglacial 2 To Elsterian Sand (Offshore) Cromerian Complex Interglacial 2 To Saalian Channel Fill Deposits, Undifferentiated (Offshore) Cromerian Complex Interglacial 2 To Saalian Diamicton, Firm To Hard (Offshore) Cromerian Complex Interglacial 2 To Saalian Mud And Sand, Interbedded (Offshore) Cromhall Coal (Bristol Area) Cromhall Sandstone Formation Cromlix Formation Cromlix Mudstone Formation Cromlox Mudstone Formation Cronk Sumark Slate Cropper Gate Rock Cropthorne Member Cropthorne Sand and Gravel Member Cropthorne Terrace Deposits Cropwell Bishop Formation [Obsolete Name And Code: Use BCMU] Crosby Thwaite Formation [Obsolete Name And Code: Subsumed Within WNY] Cross Hands Rock Cross Hill Andesite Cross Lane Limestone Cross Lane Limestones Bed Cross Slieve Group Cross-Bedded Quartzite Cross-Bedded Series Crossbasket Ironstones Crossbrae Farm Peat Bed Crossbrae Gelifluctate Crossbrae Gelifluctate Bed Crossbrae Head Crossbrae Member Crossbrae Member, Kirkhill Formation Crossbrae Peat Crossbrae Till Formation Crossdale Grit Crossdale Mudstone Crossdale Mudstone Formation Crossdale Shales Crossgates Sandstone Crosshouse Sill Crossi Bed [Obsolete Name And Code] Crosskirk Bay Formation Crosskirk Flagstone Formation Crossopodia Shales Crosspodia Shales And Penkill Flags Crossridge Formation Crosswood Ash Croughton Member Crousa Down Gravel Beds Crousa Gravels Crovie Conglomerate Crovie Group Crovie Sandstone Crovie Sandstone Group Crovie Till Formation Crow Cherts Crow Coal (A) Crow Coal (B) Crow Coal (Cumbria) Crow Coal (Dungannon: Duckmantian) Crow Coal (Dungannon: Pendleian) Crow Coal (Durham) Crow Coal (Ingleton) Crow Coal (West Yorkshire) Crow Delf Coal (Forest Of Dean) Crow Hill Conglomerate And Sandstone Member Crow Limestone Crow Sandstone Crowberry Ridge Tuff Crowland Bed Crown Coal (North Wales) Crown Coal (North Wales) [CWNC] Crows-Foot Coal (South Wales) Croxton Sand And Gravel Member Cruachan Formation Cruachan Intrusion Cruachan Phase, Starav Granite Crug Limestone Crugan Mudstone Formation Crugan Mudstones Cruiser Formation Crumbouke Coal (South Lancashire) Crumbouke Mine Crumbouke Mine Coal Crummack Formation Crummock Water Intrusion Crumpy Coal Crutchman Sandstone [Obsolete Name And Code: Use MLRS] Crutherland Coals Crutherland Coals And House Coal Crychan Formation Crying Crag Sandstone Cryne Coal (Lothian) Cuckfield Stone Cuckfield Stone Bed Cuckfield Stone Member Cucklington Oolite Cucklington Oolite Member Cuckmere Beds Cuckmere Flint Cuckmere Valley Formation Cuckoo Coal (Bristol Area) Cudworth Coal (Yorkshire) Cuil Bay Slate Formation Cuil Bay Slates Cuilfail Zoophycus Flint Cuillin Centre (Skye Central Complex) Cul Nan Gad Pluton Culbokie Silt Formation Culchavie Striped Formation Culdaff Limestone Culdoich Till Member Culfargie Beds Culfargie Sand Member Culham Sands with Cherts Member Cullaidh Shale Formation Cullardoch Diorite Cullen Quartzite [Obsolete Name And Code: Use CUQU] Cullen Quartzite Formation Cullivait Silts Formation Cullivoe Lens Member Culm Culm Group Culm Measures Culm Measures And Upper Devonian Slates Culm Supergroup Culnagrew Sandstone Formation Culvennan Intrusion Culver Chalk Formation Culver Chalk Formation And Norfolk Chalk Formation (Undifferentiated) Culver Chalk Formation And Portsdown Chalk Formation (Undifferentiated) Culver Chalk Member Cumberworth Thin Coal (South Yorkshire) Cumbrae-Stevenston Dyke Cumbria-Lancashire Catchments Subgroup Cumbrian Coast Group Cumbrian Esk Alluvium Member Cumbrian Esk Valley Formation Cumbriense Marine Band Cumcrook Limestone Cumnock Claud Coal (South Ayrshire) Cumnock Ell Coal (South Ayrshire) Cumnock Fifty Fathom Coal (South Ayrshire) Cumnock Forty Fathom Coal (South Ayrshire) Cumnock Low Ell Coal Cumnock Major Coal (South Ayrshire) Cumnock Musselband Coal (South Ayrshire) Cumnock Thirty Inch Coal (South Ayrshire) Cumnock Three Dirt Coal (South Ayrshire) Cumnock Twenty Three Fathom Coal (South Ayrshire) Cumnor Formation [Obsolete Name And Code: Use STFD] Cuniger Rock Marine Band Curdly Ironstone Curly Coal (South Wales) Curragh Formation Curran Point Halite Member Currarie Formation Curving Coal (South Wales) Cushat Limestone Cushendall Formation Cushendall Porphyry Cushendun Conglomerate Cushendun Formation Cushendun Granodiorite Cushnie Pluton Cut Away Landscape Cutcombe Slates Member Cuthill Limestone Member Cutn, Crow Coal (West Yorkshire) Cutties Hillock Sandstone Cwar Glas Member Cwm Barn Formation Cwm Berem Marine Band Cwm Berem Marine Band [Local Name: See LGMB] Cwm Clwyd Ash [Obsolete Name And Code: See CCT] Cwm Clwyd Tuff Cwm Clwyd Tuff Formation Cwm Clwyd Tuff Formation [Obsolete Name And Code: Use CGTU] Cwm Clyd Sandstone Cwm Crychan Formation [Obsolete Name And Code: Use TRE, and BRNY or CRYH as appropriate to the area] Cwm Degwel Mudstone Member Cwm Eigiau Formation Cwm Eigiau Formation And Lower, Middle And Upper Crafnant Formations (Undifferentiated) Cwm Eigiau Formation And Pen-Ychain Rhyolitic Complex (Undifferentiated) Cwm Graig Ddu Formation Cwm Gwaun Formation Cwm Hesgen Formation Cwm Mawr Coal (South Wales) Cwm Yr Aethnen Mudstones Cwm Yr Aethnen Mudstones Formation Cwm Yr Aethnen Shales Cwm-Amliw Group Cwm-Amliw Series Cwm-Amliw Tuff Formation Cwm-Yr-Eglwys Formation Cwm-Yr-Hob Member Cwmbarn Member Cwmbyr Coal (South Wales) Cwmcringlyn Formation Cwmere Formation Cwmffrwd Formation Cwmhesgen Formation [Obsolete Name And Code: See DYN, DLU] Cwmmawr Coal (South Wales) Cwmorthin Formation Cwms Rhyolites [Obsolete Name And Code] Cwmsymlog Formation [Obsolete Name And Code: See RHS] Cwmyniscoy Mudstone Formation Cwmystwyth Grits Group Cwrt-yr-ala Formation Cymerig Limestone Cymerig Limestone Member Cyrena Limestones Cyrtograptus Grayi Mudstones [Obsolete Name And Code: Use LAU] Cystoid Limestone Cystoid Limestone Member D-Bed Evaporite D2 Limestones Dab Limestone Unit Dabchick Coal (Somerset) Dacite Group Daddyhole Limestone Daddyhole Member Dailly Ell Coal Dailly Ground Coal Dailly Group [Obsolete Name And Code: Use DAI Or STNG Depending On Age] Dailly Main Coal Dailly Parrot Coal Dailly Series Dailly Subgroup Dailly Wee Coal Dalby Group Dalcharn Biogenic Formation Dalcharn Biogenic Member Dalcharn Cryoturbate Member Dalcharn Gravel Formation Dalcharn Lower Till Formation Dalcharn Palaeosol Formation Dalcharn Upper Till Formation Dale Head Breccia Member Dale Head Member Dales Voe Grit [Obsolete Code: Use DAVO] Dales Voe Grit Formation Dales Voe Grit Member Dalharco Limestone Dalkeith Under Coal (Lothian) Dalkeith Upper Coal (Lothian) Dalla Bank Limestone Dallabank Limestone Dallas Psammite Formation Dalmahoy Oil-Shale Dalmahoy Shale Dalmahoy Sill Dalmanella Lunata Beds Dalmary Sandstone Member Dalmellington Blackband Ironstone Dalmellington Diamond Coal Dalmellington Ell Coal Dalmellington Extra Coal Dalmellington Lower Diamond Coal Dalmellington Major Coal Dalmellington Two Foot Coal Dalmellington Upper Diamond Coal Dalmellington Upper Ell Coal (South Ayrshire) Dalness Breccias Dalness Ignimbrite Member Dalradian Rocks (Undifferentiated) [Obsolete Name And Code: See DALN] Dalradian Supergroup Dalradian Supergroup And Moine Supergroup (Undifferentiated) Dalreoch Division Dalreoch Formation Dalroy Sand Member Dalry Blackband Ironstone Dalry Clayband Ironstone Dalry Sandstone Formation [Obsolete Name And Code: Part Of LSC] Dalry Sandstone Member Dalserf Mussel Band (Central Coalfield) Dalswinton Moraine Formation Dalton Beds Dalton Formation Dalton Limestone (Northumberland) Dalton Rock Daltulich Psammite Formation Daltulich Semipelite Formation Dalvrecht Slate Formation Dalzell Works Lingula Band Dam House Bridge Tuff Member Dam Or Barrage Damery Beds Dandy Coal Dandy Coal (Lancashire) Dandy Mine Dandy Mine Coal Dandy Rock Dane Hills Sandstone Group Dane Hills Sandstone Member Dane Hills Sandstone Member [Obsolete Name And Code: Use AS] Danian Rocks (Undifferentiated) Danian To Ypresian Rocks (Undifferentiated) Danny Bridge Limestone Formation Daren Rhestyn Coal (South Wales) Daren-Ddu Coal (South Wales) Daren-Ddu Rider Coal (South Wales) Dargan Limestone Formation Dark Grey Mudstone Dark Grey Mudstone Member Dark Grey Mudstone Member [Obsolete Name And Code: See MSW] Dark Group Dark Group Of Blair Atholl Series Dark Limestone Dark Limestone And Dark Schist Within Blair Atholl Subgroup Dark Schists Dark Slade Member Darlington Clay Formation Darnford Conglomerate Member Darnley Coal Darnley Fireclay Darren Ddu Limestone Member Darroch Coal (North Ayrshire) Dart Formation Dart Formation (Obsolete Code: Use DART) Dart Formation [Obsolete Code: Use DART] Dart Formation [Obsolete Entry: Use DART] Dart Schists Dartford Silt Dartford Silt Member Dartington Limestone Member Dartmoor Granite Dartmoor Intrusion Dartmouth Beds Dartmouth Group Dartmouth Group [Obsolete Name And Code: Use DRTM] Dartmouth Slates [Obsolete Name And Code] Dartry Limestone Formation Darvel Lava Member Darvel Lavas Darwen Flags Darwin Formation Dash Picrite [Obsolete Name And Code] Dasses Sill Daugh Coal (Sanquhar) Daugleddau Group Dava Subgroup Dava Succession David's Hole Beds David's Stone Limestone Daviot Conglomerate Formation Davy Coal Dawlish Sands Dawlish Sandstone Dawlish Sandstone Formation Dawlish Sandstones Dawlish Sandstones And Breccias Dayia Beds Daylesford Member Ddolhir Beds [Originally Dolhir] Ddugaled Coal (South Wales) Ddwyryd Shales Dean Coal (Durham) Deanshillock Gravel Formation Dearcaige Quartzite Member Dearg Member Dearg Till Formation Debris Cone [Obsolete Name: Use TCON] Debris flow deposits Deception Coal (Lothian) Deckanhydrit Dee Bridge Sandstone Dee Valley Formation Deep Coal (Coalbrookdale) Deep Coal (South Staffordshire) Deep Conglomerate Formation Deep Hard Coal (South Yorkshire, Nottingham And Derby) Deep Hard Rock Deep Main Coal (Vale Of Belvoir) Deep Rider Coal Deep Rider Coal (Warwickshire) Deep Soft Coal (Nottingham And Derby) Deep Soft Rock Deep Yard Coal (South Lancashire) Deepdale Formation Deepdale Sandstone Formation Deepmine Coal Deer Park Andesite Deer Park Shales Deerhope Burn Flagstones [Obsolete Name And Code: Use DHP] Deerhope Formation Deerhope Siltstones [Obsolete Name And Code: Use DHP] Deerness Volcanic Member Deeside Limestone [Obsolete Code: Use DLI] Deeside Limestone Formation Deeside Subsuite Defence Establishment Deformation till Deganwy Mudstone [Obsolete Name And Code: Use COMU] Degnish Limestone Degnish Limestone Formation Delabole Member Delabole Slates Delamere Sandstone Member Delnabo Conglomerate Formation Delnadamph Volcanic Member Delta Bench Coal (North Wales) Delta Coal (North Wales) Demesne Limestones Demetae Group Den Coal (Fife) Den Siltstone Formation Den Siltstone Member Denbigh Grits (Now Formation) Denbigh Grits Formation Denbigh Grits Group [Obsolete Code And Rank: See DG] Denbigh(shire) Grits Denbighshire Grits And Shales Denbury Crinoidal Limestone Denbury Crinoidal Limestone Formation Denend Gravel Formation Denend Member Denham Valley Terrace Denham Valley Terrace Deposits Denny Lower Blackband Ironstone Denny Muir Lava Member Denny Muir Lavas Denny Upper Blackband Ironstone Dennyloanhead Ball Coal Denstone Formation [Obsolete Name And Code: Use TPSF] Dent Group Denton Mill Limestone Derbyhaven Beds Derbyhaven Formation Derenenach Mudstone Formation Derfel Limestone Member Dergvone Shale Formation Deri Beds Deri Formation Derlwyn Formation Derreens Limestone Member Derry Coal (Dungannon) Derrycreevy Sandstone Formation Derrygonnelly Sandstone Formation [Obsolete Name And Code] Derryhill Lava Member Derryloran Formation Derryloran Grit Formation (Obsolete Name And Code: Use DLN) Derryloran Grit Formation [Obsolete Name And Code: Use DLN] Derryloran Grit Member Derryloran Grits Derryvale Sandstone [Obsolete Name And Code] Derryvree Till [Obsolete Name And Code] Dersingham Beds Dersingham Beds/Snettisham Clay [Obsolete Code: See DEB And SNC] Dersingham Formation Derwenlas Formation Derwyddon Sandstone Formation Desertcreat Group Desertmartin Limestone Formation Desoglin Limestone Developed Farmland Developed Habitat Developed Parkland Devil's Bridge Formation Devil's Chimney Oolite Devil's Chimney Oolite And Cleeve Hill Oolite Devil's Chimney Oolite And Fiddler's Elbow Limestone Devil's Hole Sandstone Member Devoke Water Greisen Devoke Water Member Devoke Water Tuff Member Devon Red Sandstone Devonian And Carboniferous Rocks (Undifferentiated) Devonian Fintona Group Devonian Rocks (Undifferentiated) Dhoon Pluton Diabaig Formation Diamicton Diamond Coal Diamond Coal (North Staffordshire) Diamond Coal (Northumberland) Diamond Coal (Patna) Diamonds Ironstone (South Staffordshire) Diamonds Ironstone And Silver Threads Ironstone (Undifferentiated) (South Staffordshire) Diatomite Dibhole Coal (West Yorkshire) Dibidil Grit Member Dicky Gobbler Coal (South Derbyshire) Dicky Hare Cove Flags Dicky Hare Member Dicky Hare Semipelite Member Dicranograptus Shales [Obsolete Name And Code] Dictyocaris Member (Obsolete Name And Code: Use CHSI) Dictyocaris Member [Obsolete Name And Code: Use CHSI] Diddup Limestone Didymograptus Bifidus Beds Didymograptus Bifidus Beds And Didymograptus Murchisoni Beds (Undifferentiated) Didymograptus Shales Didymograptus Superstes Mudstones Diebidale Pelite Formation Digg Siltstone Member Dilhorne Coal (Cheadle) Dilhorne Coal (Derbyshire) Dimlington Silts Dinantian Dykes (Within MCPAD) Dinantian Intrusion (Within MCPAI) Dinantian Rocks (Undifferentiated) Dinantian To Westphalian Sills Of Lothians And Fife Dinantian Volcanic Rocks (Undifferentiated) Dinas Bran Beds Dinas Bran Formation Dinas Bran Group Dinas Dolerite Dinas Island Formation Dingle Beds Dingle Beds (Lower Old Red Sandstone) Dingle Conglomerate Member Dingle Mudstone Member Dinorwic Formation [Obsolete Name And Code: Use REL] Dinwoodie Beds Dionide Beds Diplograptus Modestus Shales [Obsolete Name: Use GLSH] Dippal Burn Formation Dippin Sill (South Arran) Dipple Fish Bed Dipton Burn Marine Beds Dipton Foot Shell Bed Dirk Sandstone Member Dirleton Plugs Dirrington Great Law Sill Dirt Coal Dirt Pot Grit Dirty Coal (South Wales) Dirty Rider Coal (South Wales) Discovery Coal (Lancashire) Diseworth Member Diseworth Sandstone Dissolution Mining Distinkhorn Dyke Swarm Distinkhorn Pluton Disturbed Blackheath Beds Disturbed ground Ditcheat Clay Member Dittisham Member Ditton Group Ditton Marine Band Ditton Marine Band [Local Name: See BJMB] Ditton Subgroup Diver Coal Division 3 (Sandy Clays) Division 4 (Sands With Chert And Ironstone) Division A3 of King (1981) Division B and the lower part of Division C of King, 1981 Division D Division D Of The Bristol Area Dixon Ground Member Doagh Limestone Member Dobb's Plantation Member Dobbie's Vein Dobbin Sandstone Formation Dock Dockra Limestone [Obsolete Name And Code: Use BLLS] Doctors Coal Doctors Mine Marine Band Doctors Mine Marine Band [Local Name: See HTMB] Doddiscombe Beds Doddiscombe Formation Doddiscombe Formation And Codden Hill Chert Formation (Undifferentiated) Dodington Ash Rock Member Dodman Formation Dodman Phyllites Dodman Series Dodman Series/Dodman Phyllites Doe Coal (South Lancashire) Doe Mine Doe Mine Coal Doethie Formation Dog Crag Tuff Member Dog Falls Psammite Formation Dogger Dogger Bank Formation Dogger Formation Dogger Formation and Saltwick Formation (Undifferentiated) Dogger Formation, Saltwick Formation, Eller Beck Formation and Cloughton Formation (Undifferentiated) Dogger Ironstone Doggy Coal Doghole Coal (South Lancashire) Doghole Mine Rock Doghole Rock Dol-Cyn-Afon Formation Dol-Cyn-Afon Member Doldowlod Conglomerate Member Dolfawr Mudstones Formation Dolgarrog Volcanic Formation Dolgau Mudstone Formation Dolgau Mudstones Dolgau Mudstones Formation Dolgau Mudstones Formation (Lower Tongue) Dolgau Mudstones Formation (Upper Tongue) Dolgellau Formation Dolgellau Formation And Dol-Cyn-Afon Formation (Undifferentiated) Dolgellau Member Dolgelly Beds [Obsolete Name And Code: Use DLU] Dolhir Beds Dolhir Formation Doll Member Dollis Hill Gravel Formation Dollis Hill Gravel Member Dolomite Beds (Of Appin) [Not Appin Dolomite] [Obsolete Name And Code] Dolomitic Beds Dolomitic Conglomerate [Obsolete Name And Code: See MMMF] Dolomitic Conglomerate And Red Marl [Obsolete Name And Code: See MMMF] Dolphinholme Mudstone Dolphinholme Mudstone Formation Dolwen Formation Dolwen Grits Dolwen Mudstones [Obsolete Name And Code: Use BMM] Dolwen Mudstones Formation Dolyfan Conglomerate Member Dolyhir Limestone Formation Don Group [Obsolete Name And Code: See ZG] Donaghadee Sandstone Formation [Obsolete Name And Code] Donald's Hill Ignimbrite Formation Donegal Appinite Suite Donegore Plugs [Obsolete Name And Code] Donside Gneisses Doobally Sandstone Member Doolie Ness Conglomerate Formation Doolie Ness Conglomerate Member Doon Dyke Swarm Doon Hill Conglomerate Doon Hill Conglomerate Member Doon Limestone Doonbought Plug Dora Villa Dyke [Obsolete Name And Code] Dorback Intrusive-Complex Dores Sandstone Dornabac Member (Central Intrusion, Rum Layered Suite) Dornabac Member (Central Intrusion, Rum Layered Suite) [Obsolete Code: Use RLC1] Dornoch Formation Dornoch Mudstone unit Dorrery Sandstone Formation Dorrery Sandstone Member Dorset Anhydrite [Obsolete Name And Code] Dorset Stour Formation Double Coal (Coalbrookdale) Double Coal (Warwickshire) Double Coal Rock Doubler Stones Sandstone Dougaled Coal (South Wales) Dougaled Rider Coal Dougaled Rider Coal (South Wales) Doughend Sandstone Member Douglas Bridge Limestone Member Douglas Coal Douglas Ell Coal Douglas Fireclay Member Douglas Four Foot Coal Douglas Humph Coal Douglas Main Coal (Douglas) Douglas Main Limestone [Obsolete Name And Code: Use HUR] Douglas Muir Quartz-Conglomerate Member Douglas Nine Foot Coal Douglas Parrot Coal Douglas Seven Foot Coal (Douglas) Douglas Six Foot Coal Douglas Smithy Coal Douglas Splint Coal (Douglas) Douglas Stoney Coal Douglas Thirty Inch Coal Douglas Three Foot Coal (Douglas) Douglas Under Limestone [Obsolete Name And Code: Use BBLS] Douglas Water Arenite Formation Douglas Wee Limestone [Obsolete Name And Code: Use BLLS] Douglasbrae Limestone Douk Ghyll Beds Doularg Formation Doulting Beds Dounalt Limestone Formation Dounans Limestone Dounans Limestone Formation Dounreay Shore Formation Dounreay Siltstone Member Doup Crag Tuff Member Doupster Oil Shale Dove Crag Member Dove Crag Tuff Member Dove Hole Formation Dove Holes Tuff Dove Rock Vent Dovedale Limestone [Obsolete Name And Code] Dovestone Redbeds Formation Dovey Valley Formation Dowbridge Mudstone Formation Doweel Breccia Formation Dowhills Beds Dowhills Mudstone Formation Dowlais Limestone Dowlais Limestone Formation Down Cliff Clay Down Cliff Clay Member Down Cliff Sand Member Down Cliff Sand Member And Thorncombe Sand Member (Undifferentiated) Down Cliff Sands Down Cliffs Clay Down Hill Marine Band [Local Name: Use CAMB] Downan Point Lava Formation Downend Formation Downend Formation And Mangotsfield Formation (Undifferentiated) Downend Group Downend Member Downend Member And Mangotsfield Member (Undifferentiated) Downholland Silt Downie Point Conglomerate Downie Point Conglomerate Formation Downie Point Conglomerate Member Downie's Loup Sandstone Formation [Obsolete Name: Use CYD] Downies Loup Sandstones (Stirling) Downton Castle Sandstone Formation Downton Castle Sandstone Formation And Temeside Mudstone Formation (Undifferentiated) Downton Castle Sandstone Group Downton Farm Gravel Member Downton Marls [Obsolete Name And Code] Downton Series Downton Subgroup Downtonian Red Marl Downtonian Sandstone Including Quartzite-Conglomerate Downwash Gravel Dowra Sandstone Member Dowsing Dolomite Formation Dowsing Formation Dowsing Formation And Dudgeon Formation Doxall Coal (Bristol Area) Doyle Gneiss Drake Formation Drake Sub-Unit Drap Coal (South Wales) Draughton Limestone Draughton Shales Dredged Or Drainage Channel Drefach Group Drews Coal Drews Coal (South Wales) Drift (Undifferentiated) [Obsolete Name And Code: See SUPD] Drift Deposits Drift Geology Not Mapped [For Digital Map Use Only] [Obsolete Name And Code: Use SUPNM] Drigg Beach Till Member Drigg Holm Sand Member Drigg Moorside Silt Member Drigg Point Sand Formation Drigg Till Formation Drimmie Lava Member Droitwich Halite Formation Droitwich Halite Member Dromore Sandstone Member Dronach Shale Member Dropping Craig Bed Dropping Craig Formation Drosgol Beds Drosgol Formation Drosgol Grits Drosgol Group Dross Coal Drowsell Coal (North Wales) Druid Conglomerate Druid Conglomerate Member Druid Conglomerates Druim An Fhurain Sandstone Member Druim Chuibhe Psammite Formation Druim Fada Quartzite Formation Druim Na Saille Pelite Formation Drum Fireclay Drumadoon Intrusion (South Arran) Drumard Member Drumarg Conglomerate Formation Drumbeg Formation Drumbeg Sand and Gravel Formation Drumbrick Sandstone Member Drumchastle Pale Limestone Formation Drumchorick Siltstone Formation Drumchorick Siltstone Formation, Benbulben Shale Formation And Tubbrid Sandstone Formation (Undifferentiated) Drumcullen Formation Drumderfit Conglomerate Member Drumflugh Limestone Member Drumgesh Shale Formation Drumgivery Limestone Member Drumgrange Limestone Drumhirk Formation Drumkeeran Siltstone Formation Drumlish Conglomerate Formation Drumlish Formation Drumlithie Sand And Gravel Formation Drumman More Sandstone Formation Drummangarvagh Member Drummock Beds Drummock Group Drummore Gravel Formation Drummore Gravel Member Drummournie Biogenic Member Drummuck Subgroup Drummuir Calcareous Member Drumnessie Lava Member Drumnessie Lavas Drumochter Succession Drumocter Succession Drumowen Sandstone Member Drumpark Marine Band Drumskinny Sandstone Member Drumwhirn Member Drumyork Flags [Obsolete Name And Code: Use DYF] Drumyork Flags Formation Dry Doddington Nodule Bed Dry valley deposits Drybrook Limestone Drybrook Limestone Formation Drybrook Limestone Formation [Obsolete Name And Code: Use HBO] Drybrook Sandstone Group [Obsolete Name And Code: Use CHSA] Dryburn Foot Limestone Dryburn Limestone Dryden Flags Dryden Flags Formation Dryden Formation Dryden Limestone Dryden Shales [Obsolete Name And Code: Use DRY] Drygarn Conglomerate (Obsolete Name And Code: Use Cbn) Drygarn Conglomerate [Obsolete Name And Code: Use CBN] Drygill Mudstone Formation Drygill Shales Dubh Loch Member Duchray Hill Gneiss [Obsolete Name And Code: Use DHGN] Duchray Hill Gneiss Member Dud Sandstone Duddo Limestone Duddon Bridge Tuff Member Duddon Bridge Tuffs Duddon Conglomerate Member Duddon Hall Tuff Formation Duddon Hall Tuffs Dudgeon Formation Dudgeon Saliferous Formation Dudley Basaltic Sill-and-vent-swarm Dudley Limestone [Obsolete Name And Code] Dufftown Limestone Member Dufton Shale Formation Dug Head Sandstone Member Duke Coal (Rothbury Area) [Obsolete Name And Code: Use BRMN] Duke Coal (South Wales) Dukinfield Marine Band Dukinfield Marine Band [Local Name: Use AGMB] Dulais Coal (South Wales) Dulas Bay Subgroup Dulas Coal (South Wales) Dulas Coal And Nine Feet Coal Dulas Limestone Dulas Limestone Formation [Obsolete Name And Code: Use LEEL] Dulcey Dock Member Dull Coal (West Yorkshire) Dullan Member Duloch Sandstone Duloch Under Limestone Dumbarton Rock Plug Dumblar Rigg Sandstone Dumbreck Cloven Coal (Central Coalfield) Dumbreck Sandstone Dumdruff Hill Lava Member Dumdruff Hill Lavas Dumfries Sandstone Dump Marine Band Dun Caan Shale Member Dun Coal (Scremerston) Dun Gallain Grit Formation Dun Limestone [Obsolete Code: Use DNL] Dun Limestone Member Dun Member Dun Scalpsie Banded Amphibolite Dunaghy Formation Dunain Hill Conglomerate Formation Dunalastair Quartzite Formation Dunalastair Semipelite Formation Dunans Clay Member Dunans Shale Member Dunaskin Clayband Ironstone Dunaskin Fireclay Dunaskin Limestone Dunaskin Rock Dunbar Sandstone Formation Dunbarella Bed Dunbeath Till Dunbeath Till Formation Dunblane Formation Dunblane Member Dunblane Sandstone Member Dunchideock Volcanics [Obsolete Name And Code] Dunconnel Hill Plug Dundarg Castle Conglomerate Dundarg Conglomeratic Sandstone Formation [Obsolete Name And Code: See DDG] Dundarg Sandstone Formation Dundary Castle Sandstone Formation Dundee Flagstone Formation Dundee Formation Dundonald Sill Dundry Freestone Dune Sandstone Duneaton Volcanic Formation Dunfallandy Hill Pluton Dunfermline Splint Coal (Fife) Dunfermline Under Coal (Fife) Dungavel Group Dungavel Hill Conglomerate Member Dungeon Ghyll Member Dungeon Ghyll Sandstone Member Dungiven Formation Dungiven Formation (A) [Obsolete Code: Use DUNN] Dungiven Formation (B) [Obsolete Code: Use DUNN] Dungiven Formation [Obsolete Code: Use DUNN] Dungiven Limestone Dunglass Coal Dungoil Linear Vent-System Dungy Drift Dungy Drift Coal (Somerset) Dungy Head And Dancing Ledge Members (Isle Of Purbeck) Dunion Hill Plug Dunkeld Grit Dunkpool Limestone Dunlin Group Dunlin Shale Member Dunlin Shale Unit Dunlin Silt Unit Dunlin Siltstone Member Dunnage Copse Gravel Member Dunnerdale Formation Dunnerdale Sandstone Formation Dunnerdale Tuffs Dunnet Head Sandstone Formation Dunnet Head Sandstone Group Dunnet Marls Dunnet Sandstone Dunnet Sandstone Group Dunnet Shale Dunnet Shell Bed Dunnottar And Crawton Groups [Undifferentiated] Dunnottar Castle Conglomerate Formation Dunnottar Castle Formation Dunnottar Conglomerate Dunnottar Group [Obsolete Name And Code: See Dunnottar-Crawton Group] Dunnottar-Crawton Group Dunoon Phyllite Dunoon Phyllite Formation Dunphail Semipelite Formation Dunrobin Bay Formation [See Also DUNR] Dunrobin Bay Group [See Also DRB] Dunrobin Beds Dunrobin Castle Member Dunrobin Pier Conglomerate Member Dunrossness Phyllite Dunrossness Phyllitic Formation Dunrossness Phyllitic Formation [Obsolete Code: Use DUPH] Dunrossness Phyllitic Group Dunrossness Spilitic Formation Dunrossness Spilitic Group Dunscombe Mudstone Formation [Obsolete Name And Code: See AS and BCMU] Dunside Formation Dunsil And First Waterloo Coal (Vale Of Belvoir) Dunsil Coal (West And South Yorkshire, Nottingham And Derby) Dunsmore Gravel Duntulm Formation Dunwich Group Dura Den Fish Bed [Obsolete Name And Code: Use DDF] Dura Den Formation Dura Den Member Durbog Coal (North Wales) Dure Clough Sandstone Dure Clough Sandstones Member Durham Complex Durham Fissure Fillings Durham Low Main Coal (Northumberland And Durham) Durham Low Main Post Sandstone Durham Lower Till Durham Lower Till (Boulder Clay) Durham Member Durham Upper Till Duricrust Durine Formation Durine Group Durisdeer Formation Durley Sand Member Durlston Beds [Obsolete Name And Code: Use DURN] Durlston Formation Durn Hill Quartzite Durn Hill Quartzite Formation Durness Group Durness Limestone Or Eriboll Limestone Durness Or Eriboll Series Durnhill Quartzite Dutch Classification System [Root term only] Dwfor Mudstone Formation Dwyfach Formation Dyehouse Coal (South Lanacashire) Dyffryn Flags Dyffryn Flags Facies Dyffryn Flags Facies (Caban Conglomerate Formation) Dyffryn Flags Facies Formation Dyffryn Mymbyr Tuff Member Dykebar Coal Dykebar Limestone Dykebar Marine Band Dykebar Marls Dykeneuk Limestone Dyneley Knoll Flags Dyrham Formation Dyrham Formation And Beacon Limestone Formation (Undifferentiated) Dyrham Formation And Marlstone Rock Formation (Undifferentiated) Dyrham Rock [Obsolete Name And Code] Dyrham Silt(s) Dyrham Siltstone Formation Dysart Main Coal (Fife) Dysart Musselband Dyserth Limestone Group (Knoll-Reef) Dyserth Limestone Group [Obsolete Name And Code: Use CLWYD] Dyserth Quarry Limestone Eagle Crag Member Eagle Crag Sandstone Member Eagle Crag Tuffs And Honister Slates Eagle Moor Member Eagle Moor Sand And Gravel Eagle Moor Sand and Gravel Member Eagle Sandstone Eaglesham Lava Member Eaglesham Lavas Earl David's Parrot Coal (Fife) Earlswood Till Early Cambrian Rocks (Undifferentiated) Early Permian Dyke (Within MCPAD) Early Permian Intrusion (Within MCPAI) Earn Gravel Earnley "Division" Earnley 'Division' Earnley Formation Earnley Sand Formation Earnley Sand Formation And Marsh Farm Formation (Undifferentiated) Earnock Blackband Ironstone Earnock Clayband Ironstone Earth flow deposits Earthwork Sandstone Earthy Coal (Lancashire) Earthy Delf Eas Mor Granite (Western Red Hills Centre: Phase 9) Easdale Slate Easdale Slate Formation Easdale Subgroup Easebourne Member Easington Formation Easington Raised Beach Formation East Barra Meta-Igneous Complex East Brow Member East Burra Group East Carlton Grit East Durham Till Formation [Obsolete Name] East Fife Basanitic And Foiditic Plugs And Vents East Glen Tilt Pluton [Obsolete Name And Code: See CLACH] East Grampian (Albion) Glacigenic Subgroup East Grampian Drift Group East Grampian Glacigenic Group East Grampian Glacigenic Subgroup East Grange Till Member East Greenland Province East Harbour Formation East Kilbride Common Coal East Kirkton Limestone East Leys Member East Leys Till East Linton Lava Member East Linton Member East Lothian Basanite And Foiditic Plugs And Vents East Lothian Subsuite (Of MCLFS) East Ogwell Limestone East Ogwell Limestone Formation East Stayvoyage Vein East Thelma Member East Wear Bay And Abbots Cliff Formations Easter Glen Quioch Psammite Easter Main Coal Eastern Glenelg Gneiss Eastern Gneiss And Sand Voe Group [Intimate Mixture] Eastern Gneisses Eastern Gneisses and Hillswick Group (Undifferentiated) Eastern Granite (Northmaven Pluton) Eastern Intrusion (Rum Layered Suite) Eastern Layered Intrusion (Rum Layered Suite) [Obsolete Code: Use RLE] Eastern Layered Intrusion, Unit 1 (Rum Layered Suite) Eastern Layered Intrusion, Unit 10 (Rum Layered Suite) Eastern Layered Intrusion, Unit 11 (Rum Layered Suite) Eastern Layered Intrusion, Unit 13 (Rum Layered Suite) Eastern Layered Intrusion, Unit 14 (Rum Layered Suite) Eastern Layered Intrusion, Unit 15 (Rum Layered Suite) Eastern Layered Intrusion, Unit 2 (Rum Layered Suite) Eastern Layered Intrusion, Unit 3 (Rum Layered Suite) Eastern Layered Intrusion, Unit 5 (Rum Layered Suite) Eastern Layered Intrusion, Unit 7 (Rum Layered Suite) Eastern Layered Intrusion, Unit 8 (Rum Layered Suite) Eastern Layered Intrusion, Unit 9 (Rum Layered Suite) Eastern Red Hills Centre (Skye Central Complex) Eastern Uriconian [Obsolete Name And Code: Part Of UO] Eastern Yar River Formation Eastertown Siltstone Member Eastgate Formation Eastgate Formation And Newside Arenite Member [Obsolete Name And Code: Use NWAE] Eastgate Sandstone Member Easton Anhydrite Member Easton Bavents Clay Member Easton Four Feet Coal (Bristol Area) Easton Seven Feet Coal (Bristol Area) Eastside Marine Band Eathie Beds Eathie Fish Bed Ebchester Formation Ebchester Sand And Gravel Formation Eccliffe Member Eccup Marine Band Ecton Limestone Formation Ecton Limestones Formation Ecton Limestones Formation (Knoll-Reef) Ecton Member Edale Shale Group [Obsolete Name And Code: Use BSG] Edale Shales Eday Beds Eday Flags Eday Flagstone Formation Eday Group Eday Lavas [Obsolete Name And Code: Use DSV] Eday Marl Eday Marl Formation Eday Sandstones Eday Volcanic Rocks Eday Volcanics Edder Acres Formation [Obsolete Name] Edderton Fish Bed Eddystone Gneiss Eden Member Eden Member of Penrith Fm of Bowen et al. (1999) Eden Shales Formation Edendork Coal Edenside Till Formation Edenvale Beds [Obsolete Name And Code] Edergole Formation Edergole Sandstone Ederny Limestone Member Edge Hill Eleven Foot And Three Foot Coals (New Cumnock Area) Edge Hill Nine Foot Coal (New Cumnock Area) Edge Hill Twelve Foot Coal (New Cumnock Area) Edge Marine Band Edgton Limestone Edgton Limestone Member Edinburgh Castle Plug Edlington Formation Edmondia Coal (Nottingham) Edmondia Marine Band Edmondia Punctatella Bed Edwalton Formation Edwalton Member Edzell Mudstone Formation [Obsolete Name And Code: See CXF] Edzell Mudstones Edzell Sandstone Formation [Obsolete Code: Use THF] Edzell Sandstones Eelwell Limestone Eelwell Limestone Member Eem Formation Eemian Mud And Sand, Interbedded (Offshore) Eemian To Weichselian Diamicton, Firm To Hard (Offshore) Eemian To Weichselian Gravel (Offshore) Eemian To Weichselian Mud, Firm To Hard (Offshore) Eemian To Weichselian Sand (Offshore) Eemian To Weichselian Sand And Gravel, Interebedded (Offshore) Eemstelsel Egedale Slate Formation Eggardon Chert Beds Eggardon Grit Eggardon Grit Member Eggesford-Type Culm Egginton Common Member Egginton Common Sand And Gravel Egginton Common Sand and Gravel Member Eglinton Member Eglinton Shelly Till Member Eglish Sandstone Formation Eglwys Rhobell Formation Eglwyseg Limestone Eglwyseg Limestone Formation Egmond Ground Formation Ehen Alluvium Formation Ehen Valley Sand And Gravel Member Ehen Valley Silt Member Eidda Formation [Obsolete Name And Code: Use CEI] Eigg Lava Formation Eight Feet Coal (South Staffordshire) Eight Foot Coal Eight Yard Limestone Eight-Yard Limestone Eighteen Inch Coal Eighteen Inch Coal (Cumbria) Eighteen Inch Coal (South Wales) Eil-Arkaig Dyke Swarm Eilde Flags Eilde Flags Formation Eilde Quartzite Eilde Quartzite Member Eilde Schist Eilde Schist Member Eilde, Binnein And Glen Coe Quartzites Eildon Hills Laccolith Eilean A'Bhaird Member Eilean Dubh Formation Eilean Dubh Formation And Ghrudaidh Formation (Undifferentiated) Eilean Dubh Group Eilean Liath Grit Formation Eilean Shona Neck Eilean Siar Glacigenic Group Eileans Sandstone Member Ekofisk Formation Elbow Deposits Elbow Formation Eldersfield Formation Eldersfield Mudstone Formation [Obsolete Name And Code: Use SIM] Eldroth Grit Eldroth Grit Formation Element Of Kirkhill Upper Till Elenid Formation Elenid Till Member Elgin Calcrete Formation Elgol Sandstone Formation Elidir Group Elie Eleven Foot Coal Elie Salt Coal Ell Coal Ell Coal (Central Coalfield) Ell Coal (Dailly ) Ell Coal (Warwickshire) Ell Coal and Ryder Coal (Undifferentiated) (Warwickshire) Ell Index Coal (Central Coalfield) Elland Flags Elland Flagstones Leaf 1 Elland Flagstones Leaf 2 Elland Flagstones Leaf 3 Elland Flagstones Leaf 4 Elland Flagstones Leaf 5 Elland Flagstones Leaf 6 Elland Flagstones Leaf 7 Elland Flagstones Leaf 8 Elland Flagstones Leaf 9 Ellel Crag Sandstone Ellen Coal Ellen Seam Ellenora Coal (Douglas) Ellens Geo Conglomerate Ellenthorpe Gill Limestone Eller Beck Bed Eller Beck Formation Ellerbeck Formation Ellergill Beds Ellerick Formation Ellerker Limestone Ellerker Limestone Member Ellery Syke Limestone Ellon Formation Ellwand Slate Elmsall Coal (West Yorkshire) Elrick Psammite And Semipelite Formation Elsham Sandstone Formation Elsham Sandstone Member Elspeth Formation Elspeth Sequence Elsterian To Holsteinian Deposits, Undifferentiated (Offshore) Elsterian To Holsteinian Diamicton, Firm To Hard (Offshore) Elsterian To Holsteinian Mud And Sand, Interbedded (Offshore) Elsterian To Holsteinian Mud, Firm To Hard (Offshore) Elsterian To Holsteinian Sand (Offshore) Elswick Mudstone Formation Elsworth Rock Elsworth Rock Formation Elsworth Rock Group Elsworth Rock Series Elsworth Series Elton Beds [Obsolete Name And Code: Use ELT] Elton Formation Elton Group Elvans Elveden Formation Elvington Glacial Lake Formation Elvington Glaciolacustrine Formation Elwick Member Elwick Moraine Member Elwy Formation Elwy Group Elygrain Vent Ember Lane Basaltic Pyroclastic-Breccia Vent Embleton Diorite Embleton Microdiorite Intrusions Embsay Limestone Embsay Limestone Member Embury Shale Emerald Formation Emerald Sandstone Emley Rock Endrick Formation Endrick Sand Member Enfield Silt Formation Enfield Silt Member Engan Spilitic Formation Engineered Embankment (Undivided) Engineered Excavation (Undivided) Engineering Excavation (Tunnelling) Enler Group Ennerdale Granite Ennerdale Granophyre Ennerdale Intrusion Ennerdale Intrusion, Diorite [Obsolete Code: Use ENIN + Rock Type] Ennerdale Intrusion, Granite [Obsolete Code: Use ENIN + Rock Type] Ennerdale Intrusion, Granophyre [Obsolete Code: Use ENIN + Rock Type] Ennerdale Intrusion, Microdiorite [Obsolete Code: Use ENIN + Rock Type] Enterkin Mudstone Formation Enville Beds Enville Breccia [Obsolete Name And Code] Enville Formation [Obsolete Name And Code: See EN] Enville Member Eocene And Oligocene Rocks (Undifferentiated) Eocene Rocks (Undifferentiated) Eocene To Miocene Rocks (Undifferentiated) Eocene To Pliocene Rocks (Undifferentiated) Epidotic Grit Formation Equates With Meadow House Clay Member Equates With The Grey Grits Of The Merthyr Tydfil District. Equivalent To Bedminster Great Coal [BEGT] Equivalent To Clee Group Equivalent To Part Of The Lower Limestone Formation Of The Midland Valley Equivalent To Pendle Top Grit. Equivalent To Skipton Moor Grit. Equivalent To The Lower Part Of The Culver Chalk Equivalent To The Upper Part Of The Culver Chalk Erbistock Formation [Obsolete Name And Code: See SAL and HA] Erbistock Group Ercall Granophyre Eriboll Formation Eriboll Group Eriboll Sandstone Formation Eriboll Sandstone Group Eriksson Formation Eriksson Member Erins Quartzite Erins Quartzite Formation Eriswell Member Erlend Acid-Intermediate Intrusives Erlend Basalts Erlend Silicic Intrusives Ernan-Glass Metabasic Swarm Errington Member Errol Beds Errol Clay Formation Errol Member Erskine Clay Member Erskine Formation Erwan Fach Formation Eryri Formation Eryry Glacigenic Formation Escarpment Member Escrick Moraine Escrick Moraine Member Esha Ness Sedimentary Rocks Esha Ness Volcanic Formation Esk Evaporite Formation Esk Evaporite Member Esk Pike Formation Esk Pike Hornstone Esk Pike Sandstone Formation Eskbank Wood Formation Eskdale Granodiorite Eskdale Group [Obsolete Name And Code: See ZG] Eskdale Intrusion Eskdale Intrusion, Granite [Obsolete Code: Use ESK + Rock Type] Eskdale Intrusion, Granodiorite [Obsolete Code: Use ESK + Rock Type] Eskdale Intrusion, Microgranite [Obsolete Code: Use ESK + Rock Type] Eskdale Intrusions Eskdale Moor Injection Breccia Eskdale Pluton Eskdalemuir Dyke Eskdalemuir Formation Esker Esker deposits Eskett Limestone Formation Eskmouth Extra Coal Essex White Ballast Essie Till Formation Estheria Shales Estheria Shales Plus Mytilus Shales Estuarine "Series" [Obsolete Name And Code] Estuarine Alluvium [Obsolete Name And Code: Use TFD] Estuarine Alluvium And Higher Estuarine Alluvium Estuarine Limestones Estuarine Series Etive Dyke Swarm Etive Formation Etive Pluton Etive Plutonic Complex Etive Rhyolite Member Etive Sub-Unit Etruria Formation Etruria Formation, Halesowen Formation And Salop Formation (Undifferentiated) Etruria Marl Etruria Marl Formation Etruria Marl Series Ettrick Group Ettrick Sandstone Ettrickbridge Formation Etwall Member Etwall Sand and Gravel Etwall Sand and Gravel Member Eumorphoceras Bisulcatum Marine Band Eumorphoceras Ferrimontanum Marine Band Eumorphoceras Ferrimontanum Marine Band [Obsolete Code: Use E2A2] Eumorphoceras Pseudobilingue Marine Band Eumorphoceras Yatesae Marine Band Eumorphoceras Yatesae Marine Band [Obsolete Code: Use E2A3] Eureka Coal (South Derbyshire) Ewingston Sill Excavata Beds Exceat Flint Excelsior Coal (Leicestershire) Exe Breccia Exe Breccia Formation Exe Valley Formation Exeter Group Exhall Conglomerate [Obsolete Name And Code: Use EXSA] Exhall Sandstone Exminster Breccias [Obsolete Name And Code: Use HVBR] Exminster Conglomerates Exmoor Group Exmouth Beds Exmouth Formation Exmouth Mudstone and Sandstone Formation Exmouth Mudstone And Sandstone Member Exmouth Sandstone And Mudstone Exmouth Sandstone And Mudstone Formation [Obsolete Name And Code: Use EMSA] Exmouth Sandstones Exmouth Sandstones And Mudstones Exogyra Nana Beds Exogyra Nana Clay Exogyra Nana Zone Extensus Flags Eyam Group [Obsolete Name And Code: See EYL] Eyam Limestone Formation Eyam Limestones Formation Eyam Limestones Formation (Flat-Reef) Eyam Limestones Formation (Knoll-Reef) Eycott Group Eycott Lava [Obsolete Name And Code: See EVG] Eycott Volcanic Group Eyebroughty Sill Eyebroughty Vent Eyemouth Vent Eyemouth Volcanic Formation Eyford Member Eyford Sandstone Member Eymore Farm Marine Band Eymore Farm Marine Band [Local Name: Use AGMB] Eynort Mudstone Formation Eynsham Gravel and Stanton Harcourt Gravel Eype Clay Eype Clay Member Eype Mouth Limestone Member F1 F1 And F2 Fachwen Formation Fachwen Formation And Minfford Formation (Undifferentiated) Fahan Grits Fahan Slates Fair Head Sill Fair Isle Group Fair Sandstone Unit Fairbottom Coal (South Lancashire) Fairbottom Mine Fairbottom Mine Coal Fairlie Sandstone Formation Fairlight Clays Fairmilehead Volcanic Member Fairmilehead, Braids And Blackford Fairy Cave Mudstone Member Falcarragh Limestone Falfield Beds Falhouse Rock Fallgate Volcanic Formation Fallowhill Coal Falls Falls Of Phones Semipelite Formation Falmouth Beds [Obsolete Name And Code: Use PORO] Falmouth Series False Bedded Grit False Bedded Limestone False Bedded Quartzite, Lower Quartzite False Ell Coal (Derby) False-Bedded Quartzite Formation False-Bedded Quartzite Member False-Bedded Quartzite Member [Obsolete Name And Code: Use BAQ] Fan Gravel Fanad Pluton Fankerton Limestone Fanogle Sandstone Far House Member Faraday House Shell Bed Marine Band Faraday Road Member Farclas Sand Member Farden Member Farewell Rock [Obsolete Name] Farigaig Formation Faringdon Sand Formation Faringdon Sponge Gravel Member Faringdon Sponge Gravels Farley Member Farlington Marls (One) Farlington Marls (Two) Farlough Coal Farlow Group Farlow Sandstone Formation Farlow Sandstone Group Farlow Series Farm Coal (South Wales) Farne Group Farnham Glaciofluvial Formation Faroe Group Faroe Plateau Basalts Faroe Plateau Lava Group Faroe-Shetland Channel Formation Faroe-Shetland Channel Sequence Faroes Province Farragon Beds Farragon Beds [Obsolete Name And Code: Use FAVO] Farragon Volcanic Formation Farrington Formation Farrington Formation And Barren Red Formation (Undifferentiated) Farrington Formation, Barren Red Formation, Radstock Formation And Publow Formation Farrington Group Farrington Member Farrington Member And Barren Red Member (Undifferentiated) Farrington Member, Barren Red Member, Radstock Member And Publow Member (Undifferentiated) Farriter Bridge Sandstone Member [Obsolete Name And Code] Fascally Sandstone Member Fascally Siltstone Member Faskadale Laminated Gabbro Zone Faughlin Lava Member Faughlin Lavas Fauldhead Musselband Fault Zone Rocks, Unassigned Faunal organic deposits Fawcett Coal (Northumberland) Fawes Wood Limestone Formation Feal Intrusion Fearn Pluton Fearnaght Formation Feldspathic Gneiss Of Strathy Felin-Wen Formation Felin-Wen Formation And Hendre Shales Formation (Undifferentiated) Fell Green Formation [Obsolete Name: Part Of BFA] Fell Sandstone Formation Fell Sandstone Group Fell Sandstone Group [Obsolete Name And Code: Use FELL] Fells Limestone Fells Shale Felmersham Member Felsenmeer Felsitic Agglomerate Felton St Mary's Limestone Fen And Terrace Gravel Fen Clay Fen Clay (Godwin,1940);Butery Clay (Skertchly,1877) Fen Clay Formation [Part] Fen Farm Limestone Fen Farm Limestones Bed Fen Gravel Fen Lower Peat Fen peat Fen Sand and Gravel Fen Silt Fen-Margin Gravel Fence Conglomerate Fence Conglomerate Member Fence Member Fenland Formation Fenton Coal (West And South Yorkshire) Fenton Limestone Fenton Limestone Bed Fenwick Limestone (Northumberland) Feorlin Sandstone Formation Ferder Formation Fereneze Lava Member Ferguslie Fireclay Fernagh Andesite And Dacite Formation (Obsolete Name And Code: Use FRNA) Fernagh Andesite And Dacite Formation [Obsolete Name And Code: Use FRNA] Fernagh Formation Fernham Sand Member Fernieslack Palaeosol Bed Fernrag Coal (Somerset) Ferriby Chalk Formation Ferriby Formation Ferricrete Ferruginous Band Ferruginous Limestone Ferruginous Limestone Series Ferruginous Oolite ('Belemnite Bed') Ferruginous Sand Ferruginous Sands Ferruginous Sands And Sandstones Ferruginous Sands Formation Feshiebridge Psammite Formation Fethaland 'Series' Fethaland 'Series' [Obsolete Name And Code: See SDVO] Fethaland Metagabbro Ffairfach Grit Ffairfach Grit Formation Ffairfach Grit Member Ffairfach Group [Obsolete Name And Code: Use FFG] Ffernant Formation Ffestiniog Flags Formation Ffestiniog Formation [Obsolete Name And Code: Use FF] Ffestiniog Group Ffinnant Sandstone Formation Ffridd Graig-Wen Formation Fiachanis Gritty Sandstone Member Fibua Formation Fiddich Sand Member Fiddler Shell Bed Fiddlers Vein Coal (Pembrokeshire) Fidra Sill Field Coal (South Wales) Fiery Coal (In South Wales Middle Coal Measures Formation) Fiery Coal (In Swansea Member, South Wales) Fiery Coal (South Lancashire) Fiery Delf (Lancashire) Fife Ness Beds Fife Ness Formation Fifth (Bushley Green Lower Part) Terrace Of The Severn Fifth Level Lacustrine Alluvium (Fermanagh) Fifth Limestone (Cumbria) Fifth Limestone To Seventh Limestone (Undifferentiated) (Cumbria) Fifth Limestone To Sixth Limestone (Undifferentiated) (Cumbria) Fifth Or Pershore Terrace [Deposits] Fifth Shale Member Fifth Terrace (River Severn) Fifth Terrace [Deposits] Filltirgerig Beds Fimbriata-Waltoni Bed (Sensu Lato) and Upper Epithyris Bed Fin Glen Lava Member Fin Glen Lavas Finavon Conglomerate Formation Finavon Conglomerate Member Findern Clay Findhorn Complex Findhorn Formation Findhorn Pluton Findhorn Pluton, Phase 1 Findhorn Pluton, Phase 2 Findhorn Pluton, Phase 3 Findhorn Sandstone Group Findhorn Siltstone unit Findlater Castle Quartzite Findlater Castle Quartzite Member Findlater Flag Formation Findlater Flags [Obsolete Name And Code: Use FIFL] Findochty Quartzite Member Findochty Sub-Group Findon Fish Bed Findon Group Fine Freestones Finery Coal (South Wales) Finery Coal [South Wales Coalfield] Finglack Till Formation Finnarts Conglomerate Member Finnie's Main Coal Finsbury Gravel Finsbury Gravel Member Finstall Member Fintona Beds Fintona Group Fintown Pelite Fintry Hills Group Fintry Hills Lava Member Fiona Formation Fiona Sequence Fionn Choire Formation Fionn Formation Fionn Sequence Fionn Subsequence Fire Beacon Chert Formation [Obsolete Name And Code: Use COH] Fireach Beag Kyanite Gneiss Member Firebeacon Chert Fireclay Balls Ironstone Fireclay Balls Ironstone (South Staffordshire) Fireclay Coal Fireclay Coal (Birmingham) Fireclay Coal (Cumbria) Fireclay Coal (Somerset) Fireclay Coal (South Staffordshire) Fireclay Group Of Coals (North Wales) Firedamp Coal (North Wales) Firestone Coal (Somerset) Firestone Sandstone Firestone Sill Firestone, Upper Green-Sand Or Malmstone First Abden Limestone First Brimham Grit First Brown Metal Coal First Brown Metal Coal (West Yorkshire) First Cromer Till First Ell Coal First Ell Coal (Nottingham And Derby) First Kingshaw Limestone First Limestone First Limestone (Cumbria) First Limestone To Second Limestone (Undifferentiated) (Cumbria) First Mine Coal First Northmoor Terrace Deposits First or 10 Foot Terrace First Or Birlington (Birlingham) Terrace First Piper Coal (South Yorkshire, Nottingham And Derby) First Shale Member First Smalley Coal First Smalley Coal (Leicester And Derby) First Smalley Marine Band First Smalley Marine Band [Local Name: Use HNMB] First St John's Coal (South Yorkshire And Derby) First Terrace First Terrace [Deposits] First Terrace Deposits First Terrace Deposits or Floodplain Gravels Plus Sunk Channel First Terrace Of The Ouse First Terrace Of Warp First Wales Coal First Waterloo Coal (South Yorkshire, Nottingham And Derby) Firth Coal Formation Fish Bed Formation Fishbourne Member Fishburn Estheria Band Fisher Beds Fisher Formation Fishgarth Wood Till Member Fishguard Volcanic Complex Fishguard Volcanic Group Fishguard Volcanic Series Fishpool Farm Grits Fiskavaig Formation Fisson's Quarry Conglomerate Fittleworth Beds Fittleworth Member Fitzroy Member Five Clouds Grit Five Clouds Sandstones Five Feet Coal (Leicestershire) Five Feet Coal (South Wales) Five Foot Coal Five Foot Coal (Milford, South Wales) Five Quarters Coal ( Lancashire) Five Quarters Coal (South Wales) Five Roads Marine Band Five Roads Marine Band [Local Name: Use EMMB] Five Yard Coal (North Wales) Five Yard Limestone Five Yard Limestone Member Five-Feet Coal (North Staffordshire) Five-Feet-Gellideg Coal (South Wales) Five-Foot Coal (Tranent) Five-Quarter Coal (Northumberland And Durham) Fivestanks Oil-Shale Fjerritslev Formation Fladdabister Limestone (?Formation) Fladen Deposits Fladen Group Fladen Member Flaggy Delf Coal (South Lancashire) Flags Formation Flagstaff Limestone Formation Flamborough Chalk Formation Flamborough Formation Flanders Moss Peat Formation Flandrian Deposits Flat Holm Limestone Member Flathill Flint Flatt Coal Flatts Coal (North Staffordshire) Flaxby-Tollerton Moraine Member Fleckies Meadow Conglomerate Fleet Member Fleet Pluton (Phase 1) Fleet Pluton (Phase 2) Fleetwood Dyke Group Fleming Hall Formation Fleming Hall Tuff Formation Fleswick Anhydrite Fleswick Dolomite Fletcher Bank Grit Fletcher Bank Grit and Midgley Grit (Undifferentiated) Flett Formation Flex Coal (Lothian) Flexible Limestone Flichity Semipelite Formation Flint Coal Rock Flinty Gravel Flinty Rhyolites Flitchity Psammite Formation Flixton Member Flockton Coal (Undifferentiated) (West Yorkshire) Flockton Thick Coal (West And South Yorkshire) Flockton Thin Coal Flockton Thin Coal (West And South Yorkshire) Flodigarry Shale Member Flood Control Basin Flood Defence Embankment Flood Plain Gravel Floodplain Gravels Floodplain Sand and Gravel Floodplain Terrace Floodplain Terrace Deposits Floodplain Terrace Deposits and Submerged Channel Floodplain Terrance Deposits Plus Buried Channel Floor Coal (Nottingham And Derby) Flora Formation Flora Sequence Floral organic deposits Flounder Formation Flow Moss Lava Member Flow Moss Lavas Flow till Flow Till, Devensian Flows Flugga Sandstone Member Fluid Extraction Fluvial Alluvium Fluvial And Older River Sands And Gravels Fluvial And Older River Sands And Gravels With Associated Clay Fluvial deposits Fluvial Deposits (Undifferentiated) Fluvial diatomite Fluvial Parts Of Swettenham And Lytham Formations. Fluvio-aeolian deposits Fluvio-Glacial Flood Gravels Fluvio-Glacial Sand And Gravel Fluvio-Marine Crag Fluvioglacial Deposits Fluvioglacial Gravel Fluvioglacial Sand And Gravel (Obsolete Name And Code: Use Gfsg) Fluvioglacial Sand And Gravel [Obsolete Name And Code: Use GFSG] Fluvioglacial Sand And Gravel, Loch Lomond Readvance [Now Obsolete] Fluvioglacial Terrace [Obsolete Name And Code: See GFTD] Flying Reed Coal Flying Reed Coal (South Staffordshire) Fochabers Sandstone Formation Fochriw Coal (South Wales) Fodderletter Calcareous Flag Formation Fodderstone Gravel Member Foel Ddu Rhyodacite Formation Foel Fadian Formation Foel Formation Foel Formation, Llanarmon Formation And Loggerheads Limestone Formation (Undifferentiated) Foel Formation, Llanarmon Formation And Loggerheads Limestone Formation (Undifferentiated) (Knoll-Reef) Foel Fras Volcanic Complex Foel Grach Basalt Formation Foel Gron Granophyric Microgranite Foel Tyrch Formation Foel Y Ddinas Mudstones Foel Y Ddinas Mudstones Formation Foel-Y-Ddinas Mudstones [Obsolete Name And Code: Use FYD] Fogger Reef Limestone Foggs Coal (South Lancashire) Foggs Mine Foggs Mine Coal Folkeston Coal (Milford, South Wales) Folkeston Vein Folkestone Beds Folkestone Formation Folkestone Formation And Sandgate Formation (Undifferentiated) Folkestone Sands Follifoot Grit Folly Coal (Milford, South Wales) Folly Sandstone Folly Vein Fontmell Magna Sand Fontmell Magna Sand Member Fooden Limestone Foot Coal (Coalbrookdale) Foot Coal (Milford, South Wales) Foot Coal (South Lancashire) Foot Of Whiskey Sike Coal Foot Of Whisky Sike Coal (Northumberland) Foot Vein Foraminifera Marine Band Foraminifera Marine Band [Local Name: Use EMMB] Ford [Magnesian Limestone] Formation Ford Formation Ford Formation (Patch-Reef) Ford Formation (Shelf-Edge Reef) Fordell Marine Band Forden Mudstone Formation Forden Mudstones Formation Fordon Evaporite [Obsolete Code: Use FOEV] Fordon Evaporite Formation Fordon Evaporites (Duplicate Code: Use PDE) Fordon Evaporites [Obsolete Code: Use FOEV] Fordyce Limestone Formation Fore Burn Complex Foreland Grits [Obsolete Name And Code] Forest Bed Forest Bed [Duplicate: use FORST] Forest Clay Forest Hollow Beds [Obsolete Name And Code] Forest Lodge Member Forest Marble Forest Marble Formation Forest Marble Formation And Cornbrash Formation (Undifferentiated) Forest Of Deer Pluton Forge Sandstone Fork Vein Coal (South Wales) Formerly Included In Claragh Sandstone Group Fornham Member Forres Sandstone Group Forse Till Member Forse Till Member Of The Lybster Formation Forster's Hill Limestone Fort Augustus Granite Gneiss Fort William Formation Forth Beds Forth Catchments Subgroup Forth Clay Formation Forth Formation Forth Valley Formation Forth-Teith Formation Forties Sandstone Member Forty Yard Coal (Somerset Coalfield, Pensford) Forty Yard Coal (South Yorkshire, Nottingham And Derby) Forty Yard Marine Band Forty Yard Marine Band [Local Name: See MFMB] Forty Yard Seam Forty Yard Vein Coal Fossiliferous Mudstones And Siltstones Foston Limestones Foston Member Foughill Complex Dolerites Foughill Complex Granophyres Foul Hosie Limestone Foul Port Mudstone Member Foula Formation Foula Sandstone Foulis Silt Formation Foulport Mudstone Member Foundered strata Four Ashes Sand And Gravel Four Ashes Sand And Gravel Formation Four Ashes Sands And Gravels Four Fathom Limestone Four Fathom Limestone Member Four Feet [Vein] Coal Four Feet Coal (Ingleton) Four Feet Coal (Titterstone Clee) Four Feet Coal (Warwickshire) Four Feet Vein [Coal] Four Foot Coal Four Foot Coal (Cheadle) Four Foot Coal (Derbyshire) Four Foot Coal (Wyre Forest) Four Foot Earth Fireclay Four-Feet Coal (South Wales) Fourlaws Coal (Northumberland) Fourlaws Limestone Fourteen Inch Under Coal [Inappropriate Name And Code: Use PFIUC] Fourteen-Inch Coal (Glasgow Area; Central Coalfield) Fourth (Kidderminster) Terrace Of The Severn Fourth Hosie Limestone Fourth Limestone Fourth Limestone (Cumbria) Fourth Limestone To Seventh Limestone (Undifferentiated) (Cumbria) Fourth Limestone To Sixth Limestone (Cumbria) Fourth Or Ailstone Terrace [Deposits] Fourth Or Hanborough Terrace Deposits Fourth Shale Member Fourth Terrace Fourth Terrace (River Severn) Fourth Terrace [Deposits] Fourth Terrace Deposits Fourth Waterloo and First Ell Coal (Vale Of Belvoir) Fourth Waterloo Coal (Nottingham And Derby) Fourth Waterloo Sandstone Fourth Waterloo Sill Fourth, High Or 100-Foot Terrace Deposits Fowls Heugh Conglomerate Formation [Obsolete Name And Code: See WCO] Fownhope Formation Fox Cliff Siltstone Member Foxdale Pluton Foxearth Coal Foxfield Coal (Cheadle) Foxholes Coal (South Lancashire) Foxholes Mine Foxholes Mine Coal Foxholes Rock Foxley Tuff Foxley Tuff Formation Foxmould Foxmould And Cowstone Beds Foxmould Member Foxmould Sands Foyers Formation Foyers Igneous Complex Foyle Marl Frances Craig Sill Frances Extra Coal Frances Wood Coal Fraser Shale Fraser Shell Bed Fraserburgh Formation Freehay Member Freeland Member Freeland Sand and Gravel Member Freeland Terrace Deposits Freemanstown Picrite Freestone Series Freestone Series [Obsolete Name And Code: Use POFR] Fremington Member Fresgeo Sandstone [Unit Name And Code Obsolete: Use FGSA] Fresgeo Sandstone Member Fresgoe Sandstone Fresgoe Sandstone Bed Fresgoe Sandstone Member Freshfield Sandstone Member Freshney Sandstone Member Freshwater Alluvium Freshwater Beds Freshwater East Formation Freshwater Gravel Member Freshwater West Formation Friar Waddon Member Friars Bay Marls (One) Friars Bay Marls (Three) Friars Bay Marls (Two) Friars Point Limestone Formation Friarton Gravel Frigate Formation Frigg Sandstone Member Frith Crag Breccia Member Frith Crag Member Frith Crag Tuffs Frizington Limestone Formation Frizington Limestone Formation And Eskett Limestone Formation (Undifferentiated) Frizington Limestone Formation And Sixth Limestone (Cumbria) (Undifferentiated) Frocester Hill Oolite And Selsey Hill Oolite Frodingham Ironstone Member Frodsham Sandstone Member Frog Hall Member Frog Hall Sand and Gravel Frog Lane Coal (South Wales) Froghall Haematite Froghall Ironstone Froghall Stone Froghill Farm Gravel Member Frogmore Gravel Frome Clay and Fuller's Earth (Undifferentiated) [Obsolete Code: Use FEFR] Frome Clay and Fuller's Earth [Undifferentiated] Frome Clay Formation Frome-Piddle Formation Fron Frys Formation Fron Frys Slates Fron Newydd Member Fron-fawr Formation Frondderw Ash [Obsolete Name And Code: See FRT] Frondderw Tuff Member Froswick Formation Froswick Tuff Formation Froswick Tuffs Fucoid Beds Fucoid Beds Formation Fucoid Beds Member Fucoid Shales Fulbeck Member Fulbeck Sand and Gravel Fulbeck Sand and Gravel Member Fulledge Thin Coal (Lancashire) Fulledge Thin Mine Fulledge Thin Mine Coal Fuller's Earth Fuller's Earth Formation Fuller's Earth Formation and Frome Clay Formation (Undifferentiated) Fuller's Earth Formation and Frome Clay Formation [Undifferentiated] Fuller's Earth Rock Member Fulletby Beds Fulletby Beds [Obsolete Name And Code: Use ROH] Fulmar Formation Fungle Granite (Mount Battock Pluton) Fungous Coal (Coalbrookdale) Fungus Coal [Coalbrookdale] Funzie Conglomerate Formation Furnace Coal Furnace Coal (Lancashire) Furnace Coal (Northumberland) Furnace Coal (Yorkshire) Furze Hill Sandstone Formation Fyal Lava Member Fydlyn Felsitic Beds [Obsolete Name And Code: See NGW] Fydlyn Felsitic Formation Fydlyn Group [Obsolete Name And Code: See NGW] Fylde Halite Member Fynddog Grits Fynnon Limestones Gaerfawr Formation Gaerfawr Group [Obsolete Code: Use GAFA] Gafallt Shales Gafallt Shales Facies (Caban Conglomerate Formation) Gafallt Shales Facies Formation Gag Lane Limestone [Obsolete Name And Code] Gaick Plateau Moraine Formation Gaick Psammite Formation Gair Burn Coal Gair Limestone Gairbeinn Pebbly Psammite Member Gairbeinn Psammite Formation Gaisby Rock Gala 7 Gala Group Gala Group And Hawick Group (Undifferentiated) Gala Unit 1 Gala Unit 2 Gala Unit 3 Gala Unit 4 Gala Unit 4 And Gala Unit 5 (Undifferentiated) Gala Unit 5 Gala Unit 6 Gala Unit 7 Gala Unit 8 Galboly Chalk Formation Galboly Chalk Member Galdenoch Formation Galdenoch Group Gale Seam Gallagh Bridge Formation Galley Sands Galloway Granitic Suite Gamlan Black Shales Gamlan Flags And Grits Gamlan Formation Gamlan Shale Group [Obsolete Name And Code: Use GN] Gamlingay Clay Gamma Coal (North Wales) Gamrie Bay Sandstone Formation Gamrie Fish Bed [Obsolete Name And Code] Ganey Coals Bed(s) (Coalbrookdale) Ganister Clay Coal (Northumberland And Durham) Ganister Coal Ganister Coal (Goyt Trough) Ganister Rock Gannochy Conglomerate Formation Gannochy Formation Garabal Hill - Glen Fyne Pluton Garantiana Mudstone Member Garantiana Mudstone Member And Cullaidh Shale Formation (Undifferentiated) Garantiana Shale Member Garbad Sill (South Arran) Garbh-Dhail Quartz-Gabbro Ring-Intrusion Garburn Dacite Formation Garburn Formation Garburn Formation [Part] Garc Garw Coal (South Wales) Gardden Lodge Marine Band Gardden Lodge Marine Band [Local Name: See CWMB] Gardden-Fawr Ash Garden Course [Vein] Garden Course Coal (Somerset) Gardenstown Conglomerate Formation Gargunnock Hills Group Gargunnock Hills Lava Member Gargunnock Sandstone [Obsolete Name And Code: Use KPF for the top part, SCK for the lower part] Garheugh Formation Garheugh Formation [Obsolete Code: Use GAR] Garibaldi Blackband Ironstone (Central Coalfield) Garibaldi Clayband Ironstone Garibaldi Coal (Central Coalfield) Garland Vein Coal (Pembrokeshire) Garlant Coal (South Wales) Garleton Hill Vent Garleton Hills Volcanic Formation Garleton Hills Volcanic Rocks Garn Bach Dacite Garn Boduan Microgranodiorite Intrusion Garn Caws Sandstone Garn Caws Sandstone Formation Garn Dolerite Garn-gofen Formation Garnant Coal (South Wales) Garnedd-Wen Beds [Obsolete Name And Code: Use GNWF] Garnedd-Wen Formation Garnel Burn Pelite Member Garnet Mica Schist "Unit" Garnetiferous Group Garnfor Microgranite Pluton Garnkirk Limestone Garnkirk Lower Fireclay Garnkirk Main Fireclay Garrique Cornstone Formation [Obsolete Name And Code: See KNW] Garrison Sill Garron Chalk Garron Chalk Formation Garron Chalk Member Garron Point Actinolitic Schists Garron Point Group [Obsolete Name And Code] Garron Point Tremolitic Flag Member Garscube Wee Coal Garsdale Limestone Formation Gartartan Conglomerate Member Garth Grit Member Garth Hill Beds Garth House Formation Garth Tuff Garth Tuff Member Gartocharn Till Formation Garva Bridge Psammite Formation Garvagh Bridge Member Garvald Lava Member Garvald Lavas Garvald Sill Garve Psammite Formation Garvock Group [Obsolete Name And Code: See Arbuthnott-Garvock Group] Garw Coal (South Wales) Garw Coal [South Wales Coalfield] Garwallt Ash Garwallt Group [Obsolete Name And Code] Garwallt Tuff Member Garwood Group Gask Intrusion Gastrioceras Cancellatum Marine Band [Obsolete Name And Code: See CNMB But Use G1A1] Gastrioceras Cumbriense Marine Band Gastrioceras Listeri Marine Band [Obsolete Name And Code: Use LSMB] Gastrioceras Sigma Marine Band Gastrioceras Subcrenatum Marine Band [Obsolete Name And Code: Use SBMB] Gastropod Beds Gastropod Limestone Gasworks Mudstone And Cartlett Beds (Undifferentiated) Gasworks Mudstones Gasworks Sandstone Formation Gaughin Quartzite Formation Gault Gault Clay Gault Clay Formation Gault Formation Gault Formation And Upper Greensand Formation (Undifferentiated) Gavells Clough Sandstone Gavells Clough Sandstone Member Gawber Coal (West Yorkshire) Gawthwaite Formation Gawthwaite Sandstone Member Gayle Limestone Gaythorn Limestone Gedden Coal Gees Coal (South Lancashire) Gelli Coals (South Wales) Gelli Dolerite Gelli Tuff Member Gelli-Grin Calcareous Ash Formation Gelli-Grin Calcareous Ash Series Gelli-Grin Calcareous Ashes Gellideg Coal (South Wales) Gellideg Coal [South Wales Coalfield] Gelliswick Bay Formation Gelvin Till [Obsolete Name And Code] General's Rock Sandstone Geordie Coal Geordie's Coal George's Roust Vein Georges Island Till German Bands Ironstone Gerrards Cross Gravel Gerrards Cross Gravel Formation Gerrards Cross Member Getting Rock Ironstone (South Staffordshire) Ghrudaidh Formation Ghrudaidh Formation [Also Grudaidh Formation] [Obsolete Code: Use GUD] Ghrudaidh Group Gibbet (Conglomerate) Hill Group Gibbet Hill Conglomerate Gibbet Hill Conglomerate Bed Giffnock Jewel Coal Giffnock Jewel Coal (Glasgow) Giffnock Main Coal Giffnock Sandstone Gilfach Coal (South Wales) Gill Coal (Douglas) Gillcambon Till Formation Gillers Inn Coal (Bristol Area) Gillespie Coal (Lothian) Gillfoot Beds [Obsolete Name And Code: Use GISD] Gillfoot Member Gillfoot Sandstone Formation Gillfoot Sandstone Member Gillis Field Microporphyroblast Gneiss Member Gilmerton Ironstone Gilmerton Limestone Gilmerton Limestone [Obsolete Name And Code: Use HUR] Gilnahirk Formation Gilnahirk Group Gilwern Clay Formation Gilwern Clay Member Gilwern Oolite Gilwern Oolite Formation Gilwern Volcanic Formation Gin Head (Older) Vent Gin Head Vent Gin Mine Marine Band Gin Mine Marine Band [Local Name: Use AGMB] Gingham Coal (South Lancashire) Gingham Mine Gingham Mine Coal Ginstane Ironstone Girlsta Limestone [Obsolete Code: Use GIRL] Girlsta Limestone Formation Girvan - Ballantrae Complex Girvan Formation Girvan Group Girvanella Band Girvanella Nodular Band Gisburn Cotes Beds Gisburn No.1 Limestone Gisburn No.2 Limestone Gisburn No.3 Limestone Gisburn No.4 Limestone Gisburn No.5 Limestone Given's Coal (Rothbury Area) [Obsolete Name And Code: Use TILY] Glac An Dorchadois Member Glac An Dorchadois Member, Brutach Dearg Member And Cnoc Creaghach Member (Undifferentiated) Glacan Mor Basic Magmatic Breccia Intrusion Glacial Brick Clay Glacial Channel Deposits Glacial deposits Glacial Deposits (Irish Sea Ice) Glacial Deposits, 1 Glacial Deposits, Devensian (Irish Sea Ice) Glacial Deposits, Heterogeneous Glacial Deposits, Heterogeneous, Devensian (Irish Sea Ice) Glacial Drift (Undifferentiated) Glacial Erratic (Parent Rock Unspecified) Glacial Gravel Glacial Lake Deposits Glacial Lake Deposits (Including Penecontemporaneous Fluviatile Deposits) Glacial Meltwater Deposits Glacial Raft (Great Limestone) Glacial Sand and Gravel Glacial Sands And Gravels Glacial Silt Glacial Silts And Clays Glacial Till Glacially Over-Ridden Terrain (By Readvance Ice) [See Descriptions For Limitations Of Use] Glacially Over-Ridden Terrain (By Readvance Ice), Mostly Fines [See Descriptions For Limitations Of Use] Glacially Over-Ridden Terrain (By Readvance Ice), Mostly Gravels [See Descriptions For Limitations Of Use] Glacially Over-Ridden Terrain (By Readvance Ice), Mostly Sand [See Descriptions For Limitations Of Use] Glacially Over-Ridden Terrain (By Readvance Ice), Mostly Till [See Descriptions For Limitations Of Use] Glacigenic deposits Glacio-Marine Deposits (Undifferentiated) Glaciofluvial deltaic (and/or subaqueous fan) deposits Glaciofluvial Deltaic Deposits Glaciofluvial Deltaic Deposits, Devensian Glaciofluvial Deltaic Deposits, Devensian (Irish Sea Ice) Glaciofluvial deposits Glaciofluvial Deposits (Irish Sea Ice) Glaciofluvial Deposits (Undifferentiated) Glaciofluvial Deposits (Undifferentiated), 1 Glaciofluvial Deposits, 1 Glaciofluvial Deposits, Anglian Glaciofluvial Deposits, Devensian Glaciofluvial Deposits, Devensian (Irish Sea Ice) Glaciofluvial Deposits, Devensian (Welsh Ice) Glaciofluvial Deposits, Mid Pleistocene Glaciofluvial Deposits, Undifferentiated (Irish Sea Ice) Glaciofluvial Deposits, Undifferentiated (Middle Pleistocene) Glaciofluvial Deposits, Undifferentiated, Anglian Glaciofluvial Deposits, Undifferentiated, Devensian Glaciofluvial Deposits, Undifferentiated, Devensian (Welsh Ice) Glaciofluvial fan deposits Glaciofluvial Fan Deposits 1, Devensian Glaciofluvial Fan Deposits 2, Devensian Glaciofluvial Fan Deposits, Devensian Glaciofluvial ice contact deposits Glaciofluvial Ice Contact Deposits, Anglian Glaciofluvial Ice Contact Deposits, Devensian Glaciofluvial Ice Contact Deposits, Devensian (Irish Sea Ice) Glaciofluvial Ice Contact Deposits, Devensian (Welsh Ice) Glaciofluvial Ice Contact Deposits, Mid Pleistocene Glaciofluvial Sand and Gravel Glaciofluvial sheet and channel deposits Glaciofluvial sheet deposits Glaciofluvial Sheet Deposits, 1 Glaciofluvial Sheet Deposits, 1, Devensian Glaciofluvial Sheet Deposits, 2 Glaciofluvial Sheet Deposits, 2, Devensian Glaciofluvial Sheet Deposits, 3 Glaciofluvial Sheet Deposits, 3, Devensian Glaciofluvial Sheet Deposits, 4, Devensian Glaciofluvial Sheet Deposits, Anglian Glaciofluvial Sheet Deposits, Devensian Glaciofluvial Sheet Deposits, Devensian (Irish Sea Ice) Glaciofluvial Sheet Deposits, Devensian (Welsh Ice) Glaciofluvial Sheet Deposits, Mid Pleistocene Glaciofluvial Sub-Glacial Deposits Glaciofluvial Sub-Glacial Deposits (Undifferentiated) Glaciofluvial terrace deposits Glaciofluvial Terrace Deposits, 1 Glaciofluvial Terrace Deposits, 2 Glaciofluvial Terrace Deposits, 3 Glaciofluvial Terrace Deposits, 4 Glaciofluvial Terrace Deposits, Devensian Glaciofluvial Terrace Deposits, Mid Pleistocene Glaciolacustrine beach deposits Glaciolacustrine deltaic deposits Glaciolacustrine Deltaic Deposits, Devensian Glaciolacustrine deposits Glaciolacustrine Deposits (Age Unknown) Glaciolacustrine Deposits (Anglian) Glaciolacustrine Deposits (Irish Sea Ice) Glaciolacustrine Deposits (Loch Lomond Readvance) Glaciolacustrine Deposits [See Descriptions for Limitations of Use] Glaciolacustrine Deposits, 1 Glaciolacustrine Deposits, Devensian Glaciolacustrine Deposits, Devensian (Irish Sea Ice) Glaciolacustrine Deposits, Mid Pleistocene Glaciolacustrine Deposits, Mostly Fines [See Descriptions for Limitations of Use] Glaciolacustrine Deposits, Mostly Gravels [See Descriptions for Limitations of Use] Glaciolacustrine Deposits, Mostly Sands [See Descriptions for Limitations of Use] Glaciolacustrine Deposits, Undifferentiated Glaciolacustrine Pro-Glacial Deposits Glaciolacustrine Proglacial Deposits Glaciolacustrine Sand And Gravel Glaciolacustrine Silt and Clay Glaciolacustrine Sub-Glacial Deposits Glaciolacustrine subaqueous fan deposits Glaciomarine beach deposits Glaciomarine deltaic deposits Glaciomarine deposits Glaciomarine sea-bed deposits Glaciomarine subaqueous fan deposits Glaciomarine subtidal deposits Glaciotectonic Thrust Terrain, Mostly Gravels [See Descriptions For Limitations Of Use] Glaciotectonic Thrust Terrain, Mostly Sands [See Descriptions For Limitations Of Use] Glacitectonic Thrust Terrain [See Descriptions For Limitations Of Use] Glacitectonic Thrust Terrain, Mostly Fines [See Descriptions For Limitations Of Use] Glamaig Granite (Western Red Hills Centre: Phase 1) Glamorgan Drift Glamorgan Formation Glamorgan Glacigenic Formation Glannoventia Formation Glanrafon Beds Glanrafon Slates [Obsolete Name And Code] Glanypwll Formation Glanyrafon Formation Glanyrafon Formation (Lower Tongue) Glanyrafon Formation (Upper Tongue) Glaramara Tuff Glaramara Tuff Member Glas Bheinn Mhor Granite (Skye Eastern Red Hills Centre: Phase 1) Glas Bheinn Porphyritic Dolerite Intrusion Glas Choire Sandstone Member Glas Coire Alluvial Member Glas Eilean Basaltic Vent Glas Eilean Lava Formation Glasallt-Fawr Formation Glascarnoch Psammite Formation Glascoed Mudstone Formation Glascoed Mudstone Formation And Ton Siltstone Formation (Undifferentiated) Glasgow Ell Coal (Central Coalfield) Glasgow Ell Index Coal (Central Coalfield) Glasgow Main Coal (Central Coalfield) Glasgow Main Under Coal (Central Coalfield) Glasgow Shale Coal (Central Coalfield) Glasgow Splint Coal (Central Coalfield) Glasgow Upper Coal (Central Coalfield) Glashvin Silt Member Glaslyn Formation Glass Coal (Midlothian) Glass Coal (Musselburgh, Midlothian) Glass Houghton Rock Glassee Coal (Fife) Glasslin Burn Conglomerate Formation [Obsolete Name And Code: See DRCR] Glassmullen Plug Glauconitic And Micaceous Sands Of The Zone Of Mortoniceras Inflatum Glauconitic Beds Glauconitic Marl Glauconitic Marl Member Glauconitic Sands Glauconitic Sands [In Part] And Ferruginous Grit Glauconitic Sandstone Member Gleann Baddoch Dolomite Gleann Beag Limestone Member Gleann Beag Phyllites Gleann Beag Ribbed Limestone Gleann Beag Schist Gleann Beag Schist Formation Gleann Charadail Member Gleann Nan Gabhar Slate Member Gleann Oraid Formation Gleaston Dolomite Gleaston Formation [Obsolete Name And Code: Use AG] Gleaston Formation And Bowland Shale Formation (Undifferentiated) Gleaston Group Glebe Farm Bed Gledstone Kennels Beds Gleilyd Coal (South Wales) Glen Achall Psammite and Semipelite Member Glen App Conglomerate Glen App Conglomerate Member Glen App Group [Obsolete Name And Code: Use CLG] Glen Baddoch White Limestone Glen Balleira Formation Glen Banchor Subgroup Glen Banchor Succession Glen Banvie Formation Glen Banvie Pluton Glen Banvie Series Glen Bay Gabbro Intrusion Glen Bay Granite Intrusion Glen Beag Schist Glen Buck Pebbly Psammite Formation Glen Caladale Formation Glen Calcareous Member Glen Clunie Graphitic Schist Formation Glen Clunie Schist Formation [Obsolete Code: Use GCGS] Glen Coal (West Lothian) Glen Coe Quartzite Member Glen Coe Quartzite Member [Obsolete Code: Use DAGQ] Glen Coe Sedimentary "Series" [Obsolete Name And Code: Part Of GLVO] Glen Coe Volcanic "Series" [Obsolete Name And Code] Glen Coe Volcanic Formation Glen Derry Diorite Glen Dessary Intrusion Glen Dessary Pluton Glen Dessary Syenite S1 Glen Dessary Syenite S2 Glen Dhoo Formation Glen Doe Psammite Formation Glen Doll Pluton Glen Dubh Sandstone Formation Glen Dye Silts Formation Glen Ea's Vein Glen Effock (Pelite) Group [Obsolete Name And Code: Use GES] Glen Effock Schist Formation Glen Effock Schists Glen Egedale Slate Formation Glen Fintaig Semipelite Formation Glen Gairn Pluton Glen Garry Vein Complex Glen Girnock Calcareous Formation Glen Gloy Quartzite Formation Glen Gour Quartzite And Pelite Formation Glen Kyllachy Granite Glen Kyllachy Intrusion Glen Kyllachy Pluton Glen Lethnot (Grit) Group [Obsolete Name And Code: Use GLGT] Glen Lethnot Grit Formation Glen Lethnot Grits Glen Loch Phyllite And Limestone Formation Glen Lochsie Calcareous Schist Member Glen Loin Quartzite Member Glen Loth Formation Glen Loy Complex Glen Member Glen More (Centre 1) Suite Glen Moriston Vein Complex Glen Orrin Intrusion Glen Park Volcanic Detrital Member Glen Park Volcanic Detrital Member [Obsolete Name And Code: Use GBV] Glen Parva Clay Glen Parva Formation [Obsolete Name And Code: Part Of CBP] Glen Parva Member Glen Rushen Formation Glen Sanda Facies [Strontian Pluton] Glen Sannox Conglomerate Glen Scaddle Complex Glen Scaddle Intrusion Glen Shee Pluton Glen Shira Subgroup And Corrieyairack Subgroup (Undifferentiated) Glen Sligachan Granite (Western Red Hills Centre: Phase 2) Glen Sluan Schist Glen Sluan Schist Formation Glen Spean Subgroup Glen Suie Limestone Member Glen Taitneach Schist Member Glen Tanar Quartzite And Mica Schist Group Glen Tanar Quartzite Member Glen Tanner Quartzite [Obsolete Name And Code: Use GTQ] Glen Tilt Intrusive-Complex Glen Turret Psammite And Semipelite Member Glen Urquhart Complex Glenade Sandstone Formation Glenade Sandstone Formation And Bellavalley Formation (Undifferentiated) Glenarm Chalk Glenarm Chalk Formation Glenarm Chalk Member Glenashdale Sill (South Arran) Glenbervie Porphyry Glenboig Limestone Glenboig Lower Fireclay (Central Coalfield) Glenboig Marine Band Glenboig Upper Fireclay (Central Coalfield) Glenbuchat Graphitic Schist Formation Glenbuck Group Glenbuck Group And Monks Water Group (Undifferentiated) Glenburn Volcanic Detrital Member [Obsolete Name And Code: See GPVD] Glenburn Volcaniclastic Member Glencar Limestone Formation Glencartholm Volcanic Beds Glencartholm Volcanic Group Glencartholm Volcanic Member Glencoe Caldera-Volcano Complex Glencoe Quartzite Glencoe Quartzite Member Glencoe Ring Intrusions Glencoe Ring Intrusions, Early Fault Intrusion Glencoe Ring Intrusions, Main Fault Intrusion Glencoe Volcanic Formation Glencolumbkille Limestone Glencolumbkille Pelite Formation Glendaruel Limestone Glendearg Formation Glendian Laminated Gabbro Zone Glendouran Breccia Formation Glendowran Formation Glendun Formation Glendun Schists [Obsolete Name And Code] Glenelly Formation Glenelly Formation (A) [Obsolete Code: Use GLLY] Glenelly Formation (B) [Obsolete Code: Use GLLY] Glenelly Formation [Obsolete Code: Use GLLY] Glenelly Greenbeds Glenfarne Dolerite [Obsolete Name And Code] Glenfiddich Pelite Formation Glenfinnan Division [Obsolete Name And Code: Use GLEN] Glenfinnan Group Glenfinnan Group And Loch Eil Group (Undifferentiated) Glenfoot Beds [Obsolete Name And Code: Use (Part Of) DYF] Glenfuir Coal [Central Coalfield] Glenga Amphibolite Member Glengawna Formation Glengawna Formation (Obsolete Code: Use GAA) Glengawna Formation [Obsolete Code: Use GAA] Gleniffer Lava Member Glenkeel Member Glenkiln Black Shales Glenkiln Shale Formation Glenkiln Shales Glenlee Formation Glenlivet Granite Glenluce Intrusion Glenmard Mudstone Member Glenmore Member Glenn Member Glennoo Limestone Formation [Obsolete Name And Code] Glenramskill Sandstone Formation Glenshalloch Shale Formation Glenshalloch Shales Glenshesk Tuff Formation Glenshirra Subgroup Glenshirra Succession Glenstaghey Formation Glentane Hill Sill Glentham Formation Glenvale Formation Glenvale Sandstone Formation Glenview Limestone Member Glenwells Conglomerate Formation Glenwells Shale Formation Glenwhan Formation [Obsolete Name And Code: Use PPF] Glenwhargen Formation Glion Cam Formation Glion Cam Unit Globe Coal (Somerset) Gloddaeth Purple Sandstone Formation Glos Oolite Series Glur-Bheinn Member Glycymeris Sandstone Glyn Dyfrdwy Group [Obsolete Name And Code] Glyn Formation Glyn Gower Formation Glyn Gower Siltstones [Obsolete Code: Use GYG] Glyn Gower Siltstones Member Glyn Grit Glyn Grit And Limestone [Obsolete Name And Code: See GYN] Glynbourne Hardgrounds Glynch Valley Formation Glynde Beds Glynde Marls (One) Glynde Marls (Two) Glyngwilym Coal (South Wales) Glynllifon Trachydacite Glynn Hill Andesite [Obsolete Name And Code] Glyntograptus Teretiusalus Shales Gnapiog Coal Gnapiog Coal (South Wales) Gneisses [Obsolete Name And Code: Unnamed Part Of MVC] Goat Gills Member Goat Island Limestone Goat Scar Dacite Member Gobb Sill Goblin Combe Oolite Formation Gobnascale Pelite Member [Obsolete Name And Code] Godir Rhyg Mudstone Member Godir Tudur Mudstone Member Godolphin Intrusion Godor Ash Godor Tuff Member Golan Burn Member Golan Well Pebbly Psammite Member Golden Coal Golden Coal (Lothian) Golden Coal (South Wales) Golden Coal [South Wales Coalfield] Goldenberry Hill Sill Goleugoed Formation Golf Course Golspie Formation Golt Gomersal Rock Gonachan Glen Linear Vent-System Gonerby Member [Obsolete Name And Code: See DYS] Goniatites Spiralis Beds [Obsolete Name And Code] Goodall's Coal Goodig Coal (South Wales) Goodig Coal [South Wales Coalfield] Goodockhill Fireclay (Central Coalfield) Goodockhill Slatyband Ironstone (Central Coalfield) Goodrington Member Goodwick Volcanic Formation Goose Sandstone Member Gop Hill Limestone Gordale Limestone Member Gordon House Member Gorestown Mudstone Member Gorge Sandstone Gorllwyn Coal (South Wales) Gorllwyn Grits Gorllwyn Rider Coal (South Wales) Gorllwyn-Fach Member Gormack Lavas Member Gormire Limestone Member Gorpley Grit Gorse Hall Rock Gorse Member [Onshore] Gorse Mudstone Member Gorsley Limestone Gorteagh Tonalite Gortfinbar Conglomerate Formation Gortnagross Sandstone Member Gortnaree Sandstone Member Gortnaskea Coal (Dungannon) Gosford Bay Sill Gosforth Glacigenic Formation Gossabrough Metadiamictite Formation Gossan Gourdie Conglomerate Formation Gourdie Conglomerate Formation [Obsolete Name And Code: See HCF] Gourdon Formation Gourdon Harbour Sandstone Member [Obsolete Name And Code: See GNF] Gourdon Sandstone Formation Gourock Formation Gourock Granite Gourock Sand Formation Gourock Sand Member Gourock Sandstone Member Gouther Crag Breccia Member Gouther Crag Member Govan Blackband Ironstone Govan Blackband Ironstone (Glasgow) Govan Coal Gowk Stane Member Gowk Stane Volcaniclastic Member Gowkstane Member Gowlaun Shale Gowlaun Shale Formation Gowlaun Shale Formation, Lackagh Sandstone Formation And Bencroy Shale Formation (Undifferentiated) Gowna Group Gowrie Member Gowrie Silt Member [Obsolete Name And Code: Use GWR] Gracilis Marine Band [Obsolete Name And Code: Use R2A1] Graianog Sandstone Graianog Sandstone Formation [Obsolete Name And Code: See Allt Lwyd Formation And Supplementary Information And ] Graig Coal (South Wales) Graig Fawr Limestone Member Graig-Wen Sandstone Formation Graigog Coal (South Wales) Graigog Marine Band Graigog Marine Band [Local Name: See MTMB] Graigog Rider Coal (South Wales) Graigola Coal Graigola Coal (South Wales) Grain Burn Member Grain Heads Siltstone Member Grainbeck Limestone Grainsgill Greisen Grammysia Bed Grammysia Beds Grammysia Member Grampian Catchments Subgroup Grampian Division [Obsolete Name And Code: Use GRAM] Grampian Group Grampian Group (Undivided) Grampian Group And Appin Group (Undifferentiated) Grampian Group and Dava Succession (Undifferentiated) Grampound And Probus Series Grampound Formation Grampound Grit [Obsolete Name And Code: Use TRSA Or GRAD] Grampound Group Gramscatho Beds Gramscatho Group Gramscathos Beds Granby Limestones Granby Member Grange Crags Andesite Member Grange Formation Grange Hill Sand Formation Grange Member Grange Sandstone Grange Sandstone Member Grange-Over-Sands Formation Grangemouth Beds Grangemouth Formation Grangemouth Silt Member Granite Grant Sand Member Grantham Formation Grantham Formation And Northampton Sand Formation (Undifferentiated) Granton Sandstone Granton Sandstones Grantown Formation Grantown Granite Pluton Grantown Pluton Graptiliferous Mudstones Graptolite Shales Gras Isaf Coal (South Wales) Gras Uchaf Coal (South Wales) Grassington Grit Grassington Grit Formation Grauer Salzton Formation Gravel Caverns Conglomerate Member Gravel Terrace Gravel Terraces Gravel, Sand And Loam Graveland Lens Member Graven Complex Gray Sandstone Group Grayber Limestone Grays Brickearth Greasborough Coal Great Arc Sandstone Great Britain Glacigenic Supergroup Great Britain Superficial Deposits Supergroup Great Caverns Conglomerate [Sic] Great Coal (Somerset) Great Coal (Titterstone Clee) Great Cockup Picrite [Obsolete Name And Code] Great Conglomerate Great Conglomerate Formation Great Course Great Course Coal (Somerset) Great Easby Clay Formation Great Easby Member Great Estuarine Group Great Estuarine Series Great Farlow Sandstone Formation Great Glen Fault Zone Great House Agglomerate Great House Intrusion Great Ladstones Breccia Member Great Ladstones Member Great Langdale Tuff Formation Great Limestone Great Limestone Member Great Mine Limestone Great Oolite Great Oolite Clay [Obsolete Name And Code: See Blisworth Clay, BWC] Great Oolite Formation [Obsolete: See CFDO] Great Oolite Group Great Oolite Limestone [Obsolete Name And Code: Use BWL, GOG or CFDO] Great Oolite Of Malmesbury District Great Oolite Series Great Orme Limestone Great Orme Limestone Formation [Obsolete Name And Code: Use LGHL] Great Quartzite Great Row Coal (North Staffordshire) Great Row Formation Great Row Measures Great Row Member Great Scar Limestone Great Scar Limestone Group Great Seam Coal (Lothian) Great Strickland Limestone Great Vein Great Wanney Crags Sandstone Great Whin Sill Great Whinscale Dacite Member Great Whinscale Member [Obsolete Name And Code: See TNM] Great Whinscale Rhyolite Great White Sandstone Great Wood Gravel Member Greatmoor Hill Vent Green Ammonite Beds Green Ammonite Member Green Beds Green Beds "Sensu Stricto" Green Beds (A) [Obsolete Name And Code: Use GRE] Green Beds (B) [Obsolete Name And Code: Use GRE] Green Beds (Obsolete Code: Use GRE) Green Beds [Obsolete: Use GRE] Green Beds Formation Green Cleugh Siltstones Green Coal (South Wales) Green Coal [South Wales Coalfield] Green Croft Till Member Green Grove Sandstone Green Keuper Basement Beds Green Lane Coal Green Member Green Mudstones "Member" Green Slates Greenan Castle Ash Greenan Castle Pyroclastic Member Greenan Formation Greenan Sandstone Formation Greenbeds Greencastle Green Beds Greencliff Beds Greengairs Lime Coal (Airdrie; Central Coalfield) Greengairs Smithy Coal Greengairs Smithy Coal (Central Coalfield) Greengate Well Limestone Greenhall Limestone [Obsolete Name And Code: Use DWL] Greenheugh Sandstone Formation Greenhill Andesite Member [Obsolete Name And Code] Greenhill Felsic Member Greenhow Limestone Greenmoor Rock Greenoakhill Sand And Gravel Member Greensand And Sandstone Greensand Formation Greensand Group [Obsolete Name And Code: See UGS] Greensand Of Morvern [Obsolete Name And Code: Use MOGR] Greensands Greenscoe Tuff Formation Greenses Coal (Northumberland) Greenses Limestone Greenshiels Intrusion Greenside Volcaniclastic Member Greenstone And Spilite Volcanics Greenstone And Spilite Volcanics [Obsolete Name And Code] Greenstone Conglomerate Greenstone Conglomerate [Obsolete Name And Code] Greenway Tuff Member Greenyards Coal Greeto Lava Member Greeto Lavas Gregynog Mudstone Member Grendon Member Grendon Member And Ecton Member (Undifferentiated) Grennan Point Formation Of The Rhins Of Galloway Grenoside Rock Grenoside Sandstone Grenoside Sandstone Coal Grenzanhydrit Formation Greta Grit Greta Grits Formation Gretna Till Formation Grey Grey and Tea Green Marls and Sully Beds Grey Beds Grey Chalk Member [Obsolete Usage: Part Of ZZCH] Grey Chalk Subgroup Grey Downtonian [Obsolete Name And Code] Grey Friar Tuff Member Grey Grits Grey Grits Formation Grey Limestone Series [Obsolete Name And Code] Grey Limestone, Upper [Obsolete Name And Code: Use CFML] Grey Marl Member Grey Marls Grey Marls And Yellow Sandstones With Chert Grey Measures Of Yorkshire And Nottingham [Obsolete Name And Code: See PLCM And PMCM] Grey Salt Clay Member Grey Sands Grey Sandstone Facies Grey Sandstone Member Grey Sandstone Series Grey Shale Grey Shale Member Grey Shale Series Grey Shales Grey Shales Formation Grey Slate Grey's Crag Coal (Northumberland) Greylake Member Greys Crags Greys Limestones Member Greystoke Till Formation Greystone Greystone Formation [Obsolete Name And Code: Use BREN] Greystone Or Passage Beds Greywacke Conglomerate Greywacke Conglomerate Formation Gribin Mudstones Gribun Chalk Gribun Chalk Formation Grid Sandstone Member Grieston Formation Grieston Slates Griffe Grange Bed [Obsolete Name And Code: Part Of WDL] Grigadale Microgranite Intrusion Grimley Andesite Grimley-Type Porphyroid Grindslow Shales Grindslow Siltstones Grindstone Limestone Grindstone Post Member Grindstone Sandstone Grindstone Sill Grinllwm Grits Grinllwm Slates Grinshill Sandstone [Obsolete Name And Code Use: HEY] Grinstead Clay Grinstead Clay Formation Grinstead Clay Member Gristhorpe Member Grit Sill Grits Group Grits In Skiddaw Slates [Obsolete Name And Code: Part Of SKG Or SKGM] Gronant Group [Obsolete Name And Code: See CLWYD And CRAV] Grorudite Swarm ["Grorudite" Swarm] Grorudite Swarm ['Grorudite' Swarm] [Obsolete Name And Code: See PARH] Group XVI Grouping Of Harford Sands Grove Coal (South Staffordshire) Grovesend Beds Grovesend Formation Grovesend Member Grudaidh Formation Grugie Pluton Grumack Hill Quartzite Member Gruney And Fethaland Formation Gruting Greenschist Formation Gryphaea Bed Gryphaea Grit Gryphite Grit Gryphite Grit And Buckmani Grit Gryphite Grit Member Gualdswell Lava Member Gubaveeny Shale Member Gubbin And Balls Ironstone (South Staffordshire) Gubbin Ironstone (South Staffordshire) Gubbin Ironstone [Also Known As Grains Or Chance] Gubeon Coal (Northumberland And Durham) Gubeon Marine Band Gubeon Marine Band [Local Name: Use AMMB] Guirdil Arkose Guirdil Member Guiseley Grit Gull Rock Shale Gullane Formation Gully Member Gully Oolite Formation Gully Redbed Formation Gun Gardens Main Marl Gun Gardens Marls (One) Gun Gardens Marls (Three) Gun Gardens Marls (Two) Gunnerton Fell Limestone Gunnscroft Limestone Gunnscroft Limestone Bed Gunthorpe Formation Gunthorpe Member Gupton Formation Gur Coal (Coalbrookdale) Gurnard Member Gurrington Slate Formation Gutter Coal (Titterstone Clee) Gutterfoot Sand Member Gutterford Burn Flagstones Gwaelo Formation Gwaelo Sequence Gwaelo Subsequence Gwaenysgor Limestone Formation Gwalchmai Formation Gwastaden Group Gwastadnant Grits Gwddel Felsitic Formation Gwendraeth Coal (South Wales) Gwent Levels Formation Gwern Feifod Lava Member Gwern Feifod Tuff Member Gwern Gof Tuff Gwern Gof Tuff Formation Gwern-Feifod Group [Obsolete Name And Code] Gwersyllt Little Coal (North Wales) Gwersyllt Little Coal (North Wales) [GWLC] Gwespyr Sandstone Gwespyr Sandstone Formation Gwna Group Gwna Melange Formation (A) [Obsolete Name And Code: See NGW] Gwna Melange Formation (B) [Obsolete Name And Code: See NGW] Gwrych Limestone Gwscwm Coal (South Wales) Gwscwm Rider Coal (South Wales) Gwyddel Felsitic Formation [Obsolete Name And Code] Gwynedd Supergroup Gwynllwg Formation Gyfenni Wood Shale Formation Gyffin Shales [Obsolete Name And Code: Use COMU] Gypseous Shales Gyrn Ddu Microgranodiorite Pluton Gyrn Goch Granite Intrusion H1 Habberley Shale Formation Hackley Limestone Member Hackness Rock Member Hackney Gravel Formation Hackney Gravel Member Haddenham Formation Haddington's Vein Haddiscoe Sand And Gravel Member Haddiscoe Sands And Gravels Haddo House Pluton Haddock Sandstone Unit Hadley Formation [Obsolete Name And Code: See ETM] Haffield Breccia Formation Haffield Conglomerate Hafod Coal (South Wales) Hafod Fawr Formation Hafod Heulog Marine Band Hafod Heulog Marine Band [Local Name: See HTMB] Hafod Ifan Limestone Member Hafod Member Hafotty Formation Hafotty Group Haggard Coal (Milford, South Wales) Haggard Vein Haggis Grit And Conglomerate Hagley Ash Hagley Shale Formation Hagley Shales Hagley Volcanic Formation Hagley Volcanic Formation [Duplicate Code: Use HGY] Hagley Volcanic Formation, Hagley Shale Formation And Whittery Volcanic Formation (Undifferentiated) Hagley Volcanic Group [Obsolete Name And Code: See HGY] Hagshaw Group Haig Fras Granite Haigh Moor Coal (West Yorkshire) Haigh Moor Rock Haigh Yard Coal (South Lancashire) Hailes Lava Member Hailes Member Hailes Sandstone Hairmyres Limestone Hairy Craig Sill Haisborough Group Haist Pebbly Sandstone Member Haist Sandstone Member Hake Mudstone Member Halberton Breccia Formation Haldon Gravel Haldon Gravel Formation Haldon Gravels Haldon Sands Haldon Sands Formation Hale Common Gravel Member Hales Clay Hales Clay Member Halesowen Beds Halesowen Formation Halesowen Formation [Duplicate Code: Use HA] Halesowen Group Halesowen Sandstone Series Half Yard Coal Half Yard Coal (Cheadle) Half Yard Coal (Cumbria) Half Yard Coal (Hanwood) Half Yard Coal (North Wales) Half Yard Coal (South Lanacashire) Half Yard Coal (Warwickshire) Half Yard Coal (Wyre Forest) Half Yard Limestone Halfway Farm Formation Halibut Carbonate Formation Halkyn Formation [Obsolete Name And Code: See Revision Data] Hall Carleton Formation Hall Gill Sandstone Hall Hill Sandstones Hallaig Sandstone Hallaig Sandstone Member Hallane Formation Halligill Limestone Halton Shales Halwell Cottage Beds Ham Green Member Ham Hill Limestone Member Ham Hill Stone Ham Mudstone Ham-Scarfskerry Flagstone Formation Ham-Scarfskerry Flagstone Subgroup Hamble Formation Hambleton Mudstone Formation Hambleton Mudstone Member Hambleton Mudstones Hambleton Oolite Member Hambleton Oolites Hamilton Sandstone Hampen Formation Hampen Marly Beds Hampen Marly Formation Hampole Beds Hampshire Avon Formation Hams Coal (North Staffordshire) Hamstead Formation [Obsolete Name And Code: Use EN] Hamstead Marshall Gravel Hamstead Member Hanborough [Gravel] Formation Hanborough Gravel Member Hanborough Member Hanborough Terrace Deposits Hanchurch Sandstone Hanchurch Sandstone Bed Hand Coal (Northumberland) Handborough Terrace Deposits Handsworth Rock Hanged Man Bed Hanged Man Member (Former Formation) Hanging Knotts Tuff Member Hanging Rocks Conglomerate Member Hanging Rocks Formation Hanging Stone Tuff Hanging Stone Tuff Member Hangman Grits [Obsolete Name And Code: Use HASA] Hangman Sandstone Formation Hangman Sandstone Group [Obsolete Name And Code: See HASA] Hannaborough Intrusion Hanworth Till Member Happendon Coal (Douglas) Happendon Limestones [Obsolete Name And Code: Subsumed Within PGP] Happisburgh Clays Happisburgh Diamicton Happisburgh Glacigenic Formation Happisburgh Glacigenic Formation And Lowestoft Formation (Undifferentiated) Happisburgh Sand Member Happisburgh Sands Happisburgh Till Member Harbour Cove Slate Formation Harbour Cove Slates Harby Head Hard Bed Band Coal (South Derbyshire) Hard Bed Band Coal (West And South Yorkshire) Hard Bed Band Marine Band Hard Bed Band Marine Band [Local Name: See MFMB] Hard Bed Band Rock (West Yorkshire) Hard Bed Coal (West And South Yorkshire) Hard Bed Marine Band Hard Bed Marine Band [Local Name: See MFMB] Hard Coal (Bristol Area) Hard Coal (South Lancashire) Hard Coal (South Wales) Hard Mine Hard Mine Coal Hard Mine Coal [Obsolete Code: Probably Replaced By HARD] Hard Splint Coal Hard Vein Coal (South Wales) Harden Beds Hardmine Coal (North Staffordshire) Hardraw Scar Limestone Hardrow Scar Limestone Hardy Coal (Northumberland) [Also Known As Stony Coal] Harehill Pluton Harelaw Lava Member Harelaw Lavas Harelawhill Limestone [Duplicate of HLLS: Use EWL] Harelawhill Limestone [Obsolete Name And Code: Use EWL] Hareshaw Conglomerate Formation Hareshaw Head Coal Harestones Felsite [Obsolete Name And Code: Use CFCOH] Harestones Rhyolite Harestones Rhyolite [In Carrock Fell Complex] Harford Member Harford Sands Harford Sands Member Hargate End Limestone Harlaw Limestone Harlech Beds (Undifferentiated) [Obsolete Name And Code] Harlech Grits Group Harlequin Formation [Obsolete Name And Code: Part Of GUN] Harley Coal (South Yorkshire) Harlock Formation Harlock Grits Harlow Hill Sandstone Harnage Shale Formation Harnage Shales Harnlo Coal (South Wales) Harptree Beds Harra Ebb Sandstone Formation Harrath Tuff Member Harrath Tuffs And Lavas Harrington Four Foot Coal (Cumbria) Harris Bay Member (Western Intrusion, Rum Layered Suite) Harris Bay Member (Western Layered Intrusion, Rum Layered Suite) [Obsolete Code: Use RLW1] Harris Member Harrison Stickle Breccia Member Harrison Stickle Member Harrock Hill Grit Harrogate Roadstone Harrogate Till Formation Harry Stoke Marine Band Harry Stoke Marine Band [Local Name: Use VDMB] Hartfell Pebbly Grit Hartfell Shales Hartfield Breccia Formation Hartfield Formation Harthwaite Formation Harthwaite Tuff Formation Hartland Quay Shale Hartlepool And Roker Dolomite [Obsolete Name And Code: Use ROD] Hartlepool Anhydrite Hartlepool Anhydrite Formation Hartley Coal Hartley Coal (Dailly) Hartley Coal (Stirling, Clackmannan) Hartley Hill Formation Hartshill Formation Hartshill Sandstone Formation Hartwell Clay Harvey Harvey Coal (Northumberland And Durham) Harvey Marine Band Harvey Marine Band [Local Term: Use VDMB] Harwich Formation Harwich Formation And Lambeth Group (Undifferentiated) Harwich Member [Obsolete Name And Code] Harwich Stone Band Harwood Band Harwood Beds Hascosay Slide Hascosay Slide Zone Mylonites Haslingden Flags Hastings Beds Hastings Beds (Subgroup) Hastings Sands Hathern Anhydrite Formation Hathern Anhydrite Series Hathern Gravel Hatherwood Limestone Member Hatton Conglomerate Formation Hatton Conglomerate Member Hatton Till Hatton Till Formation Hauchielin Coal (Tranent - Haddington) Haugh Wood Formation Haughmond Conglomerate Haughmond Conglomerate Member Haughrigg Coal Haughton Limestone Haughton Marine Band Haunchwood Bed [Obsolete Name And Code] Hauptanhydrit Formation Hauptdolomit Formation Hauxley Brockwell Coal Haven Brow Beds Haverford Mudstone Formation Haverigg Haws Anhydrite Member Haw Bank Limestone Haw Bank Limestone [Not Used By BGS: Use CHL] Haw Hill Borehole Formation Hawes Limestone Haweswater Complex [Obsolete Name And Code: See HAWS] Haweswater Ignimbrite Group Haweswater Intrusions Hawick Group Hawick Group And Riccarton Group (Undifferentiated) Hawick Group Undivided Hawick Rocks Hawk's Nest Coal Hawkcraig Point Sill Hawkesbury Clay Member Hawks Brow Flint Hawks Nest Coal Hawksmoor Formation [Obsolete Name And Code Use: CHES] Hawthorn Limestone Member [Obsolete Name And Code: Use HUR] Hayburn Beds Hayburn Formation Hayes Sandstone Formation Hayle Sandstones Haymoor Bottom Clay Member Hayne Beech Beds Hayne Beech Formation Hayne Beech Member Haystacks Andesite Haystacks Andesite Member Haystacks Member Hayton Anhydrite Haywood Under Coal Hazel Greave Grit [Obsolete Name And Code Use: GSGY] Hazel Greave Grit And Guiseley Grit (Undifferentiated) Hazelbury Bryan Formation Hazelbury Bryan Formation And Kingston Formation (Undifferentiated) Hazon Coal (Rothbury Area) Hazon Lee Coal (Northumberland) Head Head And Talus (Undifferentiated) Head Brickearth Head Brickearth, Older Head Brickearth, Younger Head Gravel [Not Recommended: Use HEAD] Head, 1 Head, 2 Head, 3 Headley Formation Headley Heath Member Headon Beds Headon Beds And Osborne Beds (Undifferentiated) Headon Formation Headon Hill Formation Headon Warren Sand And Gravel Member Heads Of Ayr Vent Headsmuir Sandstone Heales Lock Gravel Hearson Hill Mudstone Heath Hayes Coal (South Staffordshire) Heath Member Heathen Coal Heathen Coal (South Staffordshire) Heather Formation Heathery Heugh Sandstone Heavitree And Alphington Breccias [Obsolete Code: Use AHBR] Heavitree Breccia Heavitree Breccia Formation Heavitree Breccia Member Heavitree Conglomerate Heavy Industrial Development Hebblethwaite Member Hebburn Dyke Hebburn Fell Coal (Northumberland And Durham) Hebden Formation Hebridean Province Hebrides Formation Hebrides Margin Group Hebrides Subvolcanic Suite Heimdal Sandstone Member Helen's Bay Formation Hell Hole Coal (South Lancashire) Hell Hole Mine Hell Hole Mine Coal Hell's Mouth Formation Hell's Mouth Grits Hells Hole Dyke Hellvellyn Formation Helm Member Helman Head Beds [Obsolete Name And Code: See CLYTH] Helmeth Grit [Obsolete Code: Use HLG] Helmeth Grit Member Helmeth Grits Helmsdale Boulder Beds Equivalent Helmsdale Boulder Beds Formation Helmsdale Granite Helmsdale Granite, Phase 1 Helmsdale Granite, Phase 2 Helmshore Grit Helpet Edge Rock Helsby Sandstone Formation Helsby Sandstone Formation [Obsolete Code: Use HEY] Helvellyn Tuff Formation Helwellyn Tuff Member Hematitic Tuffs Hemingbrough Glacial Lake Formation Hemingbrough Glaciolacustrine Formation Hemington Member Hemington Terrace Deposits Hemlaw Vent And Plug Hempriggs Sand Member Hemsworth Division Hemsworth Member Hen Coal (Bristol Area) Hen-Dy-Capel Ironstone Member Henblas Facies [In Ystrad Meurig Grits Formation] Hendre Shales Formation Hendre Shales Formation And Mydrim Shales Formation (Undifferentiated) Hendy Farm Shales Henfryn Formation Hengistbury Beds [Obsolete Name And Code] Henllan Ash Member Hennel Cleugh Sandstone Henry's Bridge Member Hens Sike Coal Henshaw Formation Henshaw Siltstones Hensingham Grit Hensingham Group [Obsolete Name And Code: Use SMGP] Hensingham Group And Coal Measures Group (Undifferentiated) Hereford Formation Hereford Till Member Herford End-Moraine Herma Ness Gneiss Member Herma Ness Marble Member Hermaness Ultramafic Zone Hermod Sandstone Member Herne Bay Member Heron Group Herring Coal (South Staffordshire) Herring Formation Hetton Beck Limestone Member Hevda Phyllite Formation Hevdadale Intrusion Heversham House Sandstone [Obsolete Name And Code: Use SLVS] Heversham House Sandstone Member Hewett Sandstone Heyden Rock Heysham Harbour Sandstone Heysham Harbour Sandstone Formation Hibaldstow Beds Hibaldstow Limestone Hibaldstow Limestone Member Hibaldstow Limestones Hibaldstow Limestones Member Hibaldstow Oolite Hibernian Greensand Hibernian Greensand Formation Hibernian Greensands (Part) Hibernian Greensands Formation And Ulster White Limestone Formation (Undifferentiated) Hibernian Greensands Group Hidra Formation High Camlarg Coal (Dalmellington, South Ayrshire) High Coal (Bristol Area) High Corby Knowe Sill High Cross Member High Gamma-Ray Sands Unit High Grains Sandstone High Grit Sandstone High Grit Sill High Haume Limestone High Haume Mudstone High Haume Rhyolite High Haume Tuff Formation High Haume Volcanic Formation High Hazles And Brinsley Coal (Vale Of Belvoir) High Hazles Coal (South Yorkshire, Nottingham And Derby) High Ireby Formation [Obsolete Name And Code: Undifferentiated Part Of EVG] High Ireby Group [Obsolete Name And Code: See Also HIF] High Lodge Clayey Silts And High Lodge Sands High Lodge Gravel Member High Lodge Member High Lodge Silt Member High Main High Main + Metal Coal (Northumberland) High Main Coal High Main Coal (Leicestershire) High Main Coal (Northumberland And Durham) High Main Coal (Nottingham And Derby) High Main Coal (Warwickshire) High Main Marine Band High Main Marine Band [Local Name: See MTMB] High Main Marine Band Coal (Northumberland) High Main Marine Band Seam High Main Post Member High Mains Formation High Mains Sandstone High Moor Sandstone High Moor Sandstone And Doubler Stones Sandstone (Undifferentiated) High Tor Limestone Formation High Tor Limestone Formation, Cefnyrehndy Oolite Member And Hunts Bay Oolite Subgroup (Undifferentiated) High Wood Marine Beds High-Level Marine Shell Bed Higher Bent Coal (South Lancashire) Higher Bent Mine Higher Bent Mine Coal Higher Chamber Coal (South Lancashire) Higher Chamber Mine Higher Chamber Mine Coal Higher Comberoy Formation Higher Florida Coal (South Lancashire) Higher Gravel Train Higher Pigeon House Coal (South Lancashire) Higher Ravenhead Coal (South Lancashire) Higher Two Coal (South Lancashire) Higher Two Mines Higher Two Mines Coal Highest Or Barnwell Terrace (Penning And Jukes-Browne (1881) Highfield Farm Limestone Highfield Farm Limestones Bed Highfield Limestone Highgate Coal (South Yorkshire) Highgreen Coal Highland Border Complex Highland Border Grits [Obsolete Name And Code: Use BMSA] Highland Border Ophiolite-Complex Highland Border Sandstones Highland Border Series Highland Boundary Complex Highlands Felsic Minor Intrusion Cluster Highlands Mafic Minor Intrusion Cluster Highlands Older Minor Intrusion Subsuite Highlands Older Suite Highlands Plugs And Vents Highlands Younger Minor Intrusion Subsuite Highlands Younger Suite Highley Beds Highley Formation [Obsolete Name And Code: See HA] Highley Group Highley-Brooch Coal (Wyre Forest) Highstone Coal Highworth Clay Member Highworth Formation Highworth Grit Member Highworth Limestone Member Hildasay Sandstone Member Hildesay Granite Hill Farm Formation Hill House Flags Hill House Flags Member Hill House Grits Hill House Grits Member Hill House Shales Hill House Shales Member Hill Of Blairs Pluton Hill Of Fare Intrusion Hill Of Foudland Pelite Member Hill peat Hillbeck Limestone [Obsolete Name And Code: Use AFL] Hillend Algal Band Hillhead Group Hillhead Red Bed Subgroup [Obsolete Name And Code: Use HSA] Hillhead Sandstone Formation Hillhead Sandstones, Flagstones And Shales Hillhouse Limestone Hillhouse Sill Hillmorton Sand Hillside Dolomitic Formation [Obsolete Name And Code: Use LAL] Hillswick Group Hilton Gravel Hilton Gravels