Vocabularies — view dictionary terms

DIC_ROCK_NAMEV3 (3025 rows)
Dictionary table which is part of version 3 of the BGS Rock Classification Scheme. The main part of the RCS - it contains only single lithologies.

Displaying rows 186 to 205 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	Q3	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
186	BARST	Barite-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral barite. British Geological Survey Research Report RR/99/03, section 7.1 and fig. 11.	R	Barite-stone				GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock, crystals >50% non-carbonate salt, sulphates, barite (BaSO4) >50% of sulphate crystals. High RD, orthorhombic crystals colourless to yellow tabular. Form crystals/granular/massive. Crystal size not defined. An evaporite.	C
187	BASBA	Basalt, subalkali - A type of basalt (TAS). In the Rock Classification Scheme, the root name basalt (TAS) may be divided into alkali basalt and subalkali basalt according to the state of silica saturation. If the analysis contains no normative nepheline the rock may be called a subalkali basalt. British Geological Survey Research Report RR/99/06, section 5.2.	U	Subalkali basalt	subalkali			AWEL	22-JUL-02	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; CI >35 vol% >40 wt%; quartz <20% or feldspathoid <10% of QAPF, feldspar >65% plagioclase; TAS SiO2 45-52wt%, Na2O+K2O <5wt%. CIPW norm does not contain nepheline. Includes tholeiite.	C
188	BASCH	Basalt, schistose	U	Schistose basalt	schistose			AWEL	07-OCT-03	TMCM	31-AUG-18		Fine-grained, <0.25mm normal crystalline in-/extrusive rock; CI >35 vol% >40 wt%; qtz <20% or feldspathoid <10% of QAPF, felds >65% plag; TAS SiO2 45-52wt%, Na2O+K2O <5wt%. Splits into <5mm slabs/flakes defined by orientation of platy/prismatic minerals	C
189	BASTUF	Tuff, basalt	U	Basalt tuff	basalt			DJLO	18-MAY-06	TMCM	31-AUG-18	I	Not Available	C
190	BAT	Basalt (TAS) - A type of basaltic-rock, classified using the total alkali silica (TAS) classification. The TAS classification may be used if the mineral mode of a normal fine-grained crystalline rock cannot be determined due either to the presence of glass or to the fine-grained nature of the rock. The definition of basalt (TAS) is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.	R	Basalt (TAS)				GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; TAS SiO2 45-52wt%, Na2O+K2O <5wt%	C
191	BATHL	Basalt, tholeiitic - A subgroup of subalkali basalt. Tholeiitic describes a variety of basalt which is saturated or slightly oversaturated in silica with respect to alkalis so that hypersthene appears in the CIPW norm and hypersthene or pigeonite amongst the modal pyroxenes. Olivine may be present in widely varying amounts, or absent. The term is also used for a suite of rocks showing marked iron-enrichment on AFM diagrams. British Geological Survey Research Report RR/99/06, section 8.4.	U	Tholeiitic basalt	tholeiitic			AWEL	10-JUN-04	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; CI >35 vol% >40 wt%; quartz <20% or feldspathoid <10% of QAPF, felds >65% plag; TAS SiO2 45-52wt%, Na2O+K2O <5wt%. Silica saturated so hypersthene in CIPW norm + labradorite +/-glass.	C
192	BATRAT	Basaltic-trachyandesite - A type of trachytic-rock, classified using the total alkali silica (TAS) classification. The TAS classification may be used if the mineral mode of a normal fine-grained crystalline rock cannot be determined due either to the presence of glass or to the fine-grained nature of the rock. The definition of basaltic-trachyandesite is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.	R	Basaltic-trachyandesite				AWEL	21-MAY-02	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; TAS SiO2 49.4-57wt%, Na2O+K2O 5-9.3wt%	C
193	BATTUF	Tuff, basaltic-trachyandesitic	U	Basaltic-trachyandesitic tuff	basaltic	trachyandesitic		AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes, >75vol% pyroclastic fragments, >75% ash <2mm; normal crystalline extrusive rock; TAS SiO2 49.4-57wt%, Na2O+K2O 5-9.3wt%.	C
194	BATUF	Tuff, basaltic	U	Basaltic tuff	basaltic	trachyandesitic		AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; <25vol% pyroclastic fragments ash <2mm. Quartz <20% or felspathoids <10% of QAPF feldspar >65% plagioclase; TAS SiO2 <52wt%	C
195	BAUX	Bauxite - One of the hydroxides and oxides of alumina. It consists predominantly of hydrated aluminium oxides with iron oxides and other impurities. British Geological Survey Research Report RR/99/03, section 9.2.	R	Bauxite				GRBA	24-FEB-00	TMCM	13-MAR-19		Sediment & sedimentary rock, particles >50% aluminium hydroxides & iron oxide, dominantly clay-grade <0.004mm. Other mineral particles/grains present as impurities.	C
196	BAV	Basalt, variolitic	U	Variolitic basalt	variolitic			DJLO	07-JUL-08	TMCM	31-AUG-18	I	Not Available	C
197	BAVBR	Volcaniclastic-breccia, basaltic	U	Basaltic volcaniclastic-breccia	basaltic			AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; <25vol% dominantly angular pyroclastic fragments, lapilli/blocks>bombs av. >2mm. Quartz <20% or felspathoids <10% of QAPF feldspar >65% plagioclase; TAS SiO2 <52wt%	C
198	BAVST	Volcaniclastic-sandstone, basaltic	U	Basaltic volcaniclastic-sandstone	basaltic			AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; <25% pyroclastic fragments, sand grade av. 0.032-2mm. Quartz 20% or feldspathoid 10% of QAPF feldspar 65% plagioclase. TAS SiO2 52wt%	C
199	BBIS	Blackband ironstone - A dark variety of mud ironstone containing siderite clasts and sufficient carbonaceous material (10 to 20%) to make it self-calcining. British Geological Survey Research Report RR/99/03, section 13.	N	Blackband ironstone				TMCM	27-MAY-20			I	Not Available	O
200	BBRCOL	Banded-bright-coal - A type of bituminous-coal, classified according to brightness. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.	R	Banded-bright-coal				GRBA	24-FEB-00	TMCM	08-MAR-19		Bituminous coal brightness type. Prefix defines type	C
201	BBTPH	Bomb-block-tephra - A type of pyroclastic-sediment. In the Rock Classification Scheme, it is a pyroclastic-sediment in which the average size of more than 75% of the pyroclastic fragments exceeds 64 mm. Block-tephra, bomb-block-tephra, block-bomb-tephra, and bomb-tephra are separated according to the relative proportion of blocks (angular fragments exceeding 64 mm) and bombs (rounded fragments exceeding 64 mm): if between 50% and 75% of all pyroclastic fragments bigger than 64 mm are blocks the sediment is bomb-block-tephra. It is the unconsolidated equivalent of pyroclastic-breccia. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.	R	Bomb-block-tephra				AWEL	17-DEC-04	TMCM	15-FEB-19		Unimodal, well sorted, unconsolidated clastic material >10% debris formed by volcanic processes, >75vol% pyroclastic fragments, >75% >64mm bombs	C
202	BC	Boulders, clayey [Unlithified Deposits Coding Scheme]	U	Clayey boulders [UDCS]	clayey			AWEL	17-DEC-04	TMCM	30-AUG-18		Not Available	C
203	BCLAVA	Lava, basaltic	U	Basaltic lava	basaltic			DJLO	18-MAY-06	TMCM	31-AUG-18	I	Not Available	C
204	BCLV	Boulders, clayey, cobbly, gravelly [Unlithified Deposits Coding Scheme]	U	Gravelly cobbly clayey boulders [UDCS]	clayey	cobbly	gravelly	DJLO	20-FEB-09	TMCM	30-AUG-18	I	Not Available	C
205	BCP	Boulders, clayey, peaty [Unlithified Deposits Coding Scheme]	U	Peaty clayey boulders [UDCS]	clayey	peaty		AWEL	17-MAR-04	TMCM	30-AUG-18		Not Available	C

Displaying rows 186 to 205 of 3025