| Computer Code: |
PUCM |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Bolsovian Substage (CC)
— Asturian Substage (CAS) |
| Lithological Description: |
Interbedded grey mudstone, siltstone and pale grey sandstone, commonly with coal seams, but no mudstones containing marine fossils are present. |
| Definition of Lower Boundary: |
Defined by Stubblefield and Trotter, 1957 as the top of the dark grey fissile mudstone with marine fossils of the Cambriense Marine Band. In the Scottish Solway area the base of the Upper Coal Measures was formerly taken at the base of the Aegiranum (Skelton) Marine Band but is now proposed to be taken at the top of the Cambriense Marine Band to conform with the position elsewhere in the Pennine Basin. |
| Definition of Upper Boundary: |
At the point in the conformable sequence where red or brown mudstones of primary origin, typically assigned to the Warwickshire Group, become predominant over the grey beds, or at the base of the sub-Permian unconformity. |
| Thickness: |
To 350 m in the North Staffordshire (Potteries) Coalfield; 800 m thick in the Canonbie Coalfield. |
| Geographical Limits: |
Central and northern England and North Wales. |
| Parent Unit: |
Pennine Coal Measures Group (PCM)
|
| Previous Name(s): |
Upper Coal Measures Formation [Obsolete Name And Code: Use PUCM, UCMS]
(UCM)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Base: Parkhouse Colliery No.1 underground borehole, Stoke-on-Trent (SJ85SW/19), section from to 529 ft (161.2 m) depth at the top of the Cambriense Marine Band to rockhead at a depth of 17 ft 6 in (5.3 m). Rees and Wilson, 1998. |
| Reference Section |
Top and upper part: Wolstanton Colliery No.3 shaft, Stoke-on-Trent, from 1142 ft 7 ins (348.2 m) depth to base of shaft. Rees and Wilson, 1998. |
| Reference Section |
Base and lower part: Holditch Quarry No.4 underground borehole, Stoke-on-Trent (SJ84NW30), from 657 ft (200.25 m) depth to top of borehole, interpreted as the top of the Cambriense Marine Band to above the Great Row Coal. Rees and Wilson, 1998. |
| Type Area |
Potteries Coalfield, Stoke-on-Trent, North Staffordshire, numerous borehole and shaft sections, few exposures. Rees and Wilson, 1998. |
| Reference(s): |
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. |
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
| Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. |
| Stubblefield, C J and Trotter, F M, 1957. Divisions of the Coal Measures on Geological Survey Maps of England and Wales. Bulletin of the Geological Survey of Great Britain, No.13, p.1-5. |
| Rees, J G and Wilson, A A. 1998. Geology of the country around Stoke-on-Trent. Memoir of the British Geological Survey, Sheet 123 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E100
E011
E012
E123
E126
E014
E141
E015
E155
E021
E216
E022
E023
E262
E028
E050
E078
E085
E087
E009
E098
|
