The BGS Lexicon of Named Rock Units — Result Details

Carse of Stirling Clay Member

Computer Code: COSCL Preferred Map Code: notEntered
Status Code: Full
Age range: Holocene Epoch (QH) — Holocene Epoch (QH)
Lithological Description: Clayey silt and clay, commonly rooty and structureless; highly laminated with silt and very fine- to medium-, locally coarse-grained sand; grey, black and brownish grey, finely micaceous, dark sulphidic patches, shells and shell fragments, vivianite grains. These are deposits of an estuarine tidal flat complex formed just before and during highest Holocene sea-level (Main Post-Glacial Shoreline).
Definition of Lower Boundary: Unconformable, on the sub-Carse Peat (Flanders Moss Peat Formation) and older Holocene and late Devensian units including the Letham Silt Member.
Definition of Upper Boundary: Upper boundary partly unconformable with transgressing Claret Clay Member (Carse Clay Formation) and unconformably overlain by surface peats; commonly at surface partly because of peat clearances from the 18th century onwards. It also passes laterally into the peat bodies of East and West Flanders Mosses.
Thickness: Veneer to perhaps as much as 15m
Geographical Limits: Upper Forth valley from Aberfoyle eastwards to near the Forth estuary in the Falkirk area; area of the estuarine deposits of the Main Post-Glacial Shoreline and associated raised beach surfaces.
Parent Unit: Carse Clay Formation (CARCL)
Previous Name(s): Carse Clay (-803)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Stirling No 5 Greenfoot, BGS Ref NS69NE/2, from surface to 12.19m. 
Type Section  Survey No 2 Bore Westwood Lane, BGS Ref NS79NW/3, surface to 28ft 6in. 
Reference(s):
Browne, M A E, Graham, D K and Gregory, D M 1984. Quaternary estuarine deposits in the Grangemouth area, Scotland. Report of the Institute of Geological Sciences, No.16/3. 
Smith, D E and Holloway, L K. 2000. The geomorphological setting of Flanders Moss. Forth Naturalist amd Historian, Vol.23, 3-20. 
Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S038 S039 S039 S040 S031