The BGS Lexicon of Named Rock Units — Result Details
Scottish Middle Coal Measures Formation
| Computer Code: | MCMS | Preferred Map Code: | MCMS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Duckmantian Substage (CB) — Duckmantian Substage (CB) | ||
| Lithological Description: | Sandstone, siltstone and mudstone in repeated cycles that most commonly coarsen upwards but also fine upwards locally, with seatclay or seatearth and coal at the top. The mudstone and siltstone are usually grey to black, while the sandstone is fine- to medium-grained and off-white. Coal seams are common and many exceed 0.3m in thickness. | ||
| Definition of Lower Boundary: | Base of the Vanderbeckei (Queenslie) Marine Band. | ||
| Definition of Upper Boundary: | The conformable and transitional boundary from the Scottish Middle Coal Measures Formation to the Scottish Upper Coal Measures Formation 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). | ||
| Thickness: | To 330m | ||
| Geographical Limits: | Scotland. | ||
| Parent Unit: | Scottish Coal Measures Group (CMSC) | ||
| Previous Name(s): | Middle Coal Measures (Scotland) [Obsolete Name and Code: Use MCMS]
(-392)
Middle Coal Measures Formation [Obsolete Name And Code: Use PMCM, MCMS, SWMCM] (MCM) Productive Measures (part) [Obsolete Name and Code: Use MCMS] (-2313) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Borehole (NS75NE/316) Dalzell Works Bore No.4; 9.5m to 26m. Covering top of formation to Drumpark Marine Band. | ||
| Reference Section | Borehole (NS76SE/77A) Moffat Mills Water Bore, 50ft (15.24m) to 123ft (37.49m). (Includes fullest development of Vanderbeckei (Queenslie) Marine Band. | ||
| Partial Type Section | Borehole (NS75NW/68) at Clyde Bridge from 9 fathoms, 5 feet, 4 inches (18.08m) to 102 fathoms, 3 feet, 2 inches (187.50m). Covering the Drumpark Marine Band to base of formation (non-marine phase of Queenslie Marine Band). | ||
| Reference(s): | |||
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D Monro, S K, and Chisholm, J I. 1999. A lithostratigraphical framework for the Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Research Report RR/99/07. | |||
| 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. | |||
| 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: | |||
| S031 S031 S030 S022 S023 S012 S015 S013 S015 S006 S011 S338 S014 S023 S032 S040 S039 S041 | |||