The BGS Lexicon of Named Rock Units — Result Details

Pennine Upper Coal Measures Formation

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 350m in the North Staffordshire (Potteries) Coalfield; 800m 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 (161.2m) depth at the top of the Cambriense Marine Band to rockhead at a depth of 17 ft 6 in (5.3m). Rees and Wilson, 1998 
Reference Section  Top and upper part: Wolstanton Colliery No.3 shaft, Stoke-on-Trent, from 1142 ft 7 ins (348.2m) 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 (200.25m) 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):
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