The BGS Lexicon of Named Rock Units — Result Details

Publow Member

Computer Code: PUB Preferred Map Code: notEntered
Status Code: Full
Age range: Asturian Substage (CAS) — Stephanian Stage (CS)
Lithological Description: Mainly a grey mudstone and siltstone, with subordinate sandstone and rare thin coals. The sandstones are typically of lithic 'Pennant' type, but also include massive quartzose sandstones.
Definition of Lower Boundary: The base is taken at the Top of the Withy Mills Vein Coal in the Radstock Basin; top of the Forty Yard Vein Coal in the Pensford Basin. Underlain conformably by grey mudstones of the Radstock Member.
Definition of Upper Boundary: The top of the grey mudstone and siltstone of the Publow Member is truncated by the Permo-Triassic unconformity, overlain by the red mudstones of the Mercia Mudstone Group.
Thickness: A maximum thickness of 600 m is recorded in the Pensford Basin.
Geographical Limits: Restricted to the Somerset Coalfield (ST 66).
Parent Unit: Grovesend Formation (GDB)
Previous Name(s): Publow Formation (-2382)
Publow Group (-2987)
Alternative Name(s): none recorded or not applicable
Type Area  Publow, Somerset, located in the Pensford Basin. Kellaway and Welch, 1993 
Reference Section  Hursley Hill Borehole ST66NW/20, from the base of the member at 306.6 m depth, to the top of the borehole; top of member not proved. Kellaway and Welch, 1993 
Waters, C N, Barclay, W J, Davies, J R and Waters, R A. In press. Stratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/05/06. 
Kellaway, G A. 1969. The Upper Coal Measures of South-West England compared with those of South Wales and the Southern Midlands. Compe Rendu 6e Congres Internationale Stratigraphie et Geologie Carbonifere, Sheffield, 1967, Vol. 3, 1039-1055. 
Kellaway, G A and Welch, F B A, 1993. Geology of the Bristol district. Memoir of the British Geological Survey Special Sheet [England and Wales]. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E281 E280