The BGS Lexicon of Named Rock Units — Result Details

Scottish Upper Coal Measures Formation

Computer Code: UCMS Preferred Map Code: UCMS
Status Code: Pending Upgrade
Age range: Bolsovian Substage (CC) — Asturian Substage (CAS)
Lithological Description: Sandstone, siltstone and mudstone in repeated cycles, most commonly fining upwards; argillaceous rocks commonly as structureless beds and seatearth; commonly reddish brown or purple due to oxidation of originally grey strata; some reddening may be primary.
Definition of Lower Boundary: The conformable and transitional boundary from Middle Coal Measures is drawn at the base of the Aegiranum (Skipsey's) Marine Band. The original definition (MacGregor, 1960) placed the boundary at the top of this marine band. The revision was made by Forsyth et al (1996).
Definition of Upper Boundary: Not known at outcrop due to unconformity beneath Permo-Triassic rocks.
Thickness: Maximum thickness probably exceeds 750m under the Firth of Forth
Geographical Limits: Midland Valley of Scotland.
Parent Unit: Scottish Coal Measures Group (CMSC)
Previous Name(s): Upper Coal Measures (Scotland) (-585)
Upper Coal Measures Formation [Obsolete Name And Code: Use PUCM, UCMS] (UCM)
Barren Red Measures (-1887)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Hallside Borehole (BGS Ref. No. NS65NE/66) between surface and 285m depth. 
Reference(s):
Forsyth, I H, Hall, I H S and McMillan, A A. 1996. Geology of the Aidrie district. Memoir of the British Geological Survey, Sheet 31W (Scotland). 
MacGregor, A G, 1960. Division of the Carboniferous on Geological Survey Scottish Maps. Bulletin of the Geological Survey of Great Britain, No.16, 127-130. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S040 S012 S015 S023 S031 S015 S011 S014 S023 S032 S030 S039 S041