The BGS Lexicon of Named Rock Units — Result Details

Stockiemuir Sandstone Formation

Computer Code: SCK Preferred Map Code: notEntered
Status Code: Full
Age range: Late Devonian Epoch (DU) — Late Devonian Epoch (DU)
Lithological Description: Red and bright red, cross-bedded sandstones with scattered mudstone clasts and a few quartz pebbles in the lower part, overlain by purple, yellow and pink sandstones with sporadic cornstones of the Kinnesswood Formation in the upper part, which has scattered quartz pebbles near the base. The unit is faulted against the underlying grey and red-purple sandstones and mudstones of the Lower Devonian, Arbuthnott-Garvock Group.
Definition of Lower Boundary: Passes downwards and laterally into the Rosneath Conglomerate Formation in the Inverclyde-Loch Lomond area. Further east in the Kippen area, Francis, Forsyth, Read and Armstrong (1970) record Gargunnock Sandstones (~SCK) resting on the Teith Sandstone Formation.
Definition of Upper Boundary: The base of the Kinnesswood Formation.
Thickness: In excess of 400m thick.
Geographical Limits: The Firth of Clyde and Stirling areas, on sheets 30W, 30E, 39W.
Parent Unit: Stratheden Group (SAG)
Previous Name(s): Gargunnock Sandstone [Obsolete Name And Code: Use KPF for the top part, SCK for the lower part] (GKS)
Upper Old Red Sandstone (UORS)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Stockiemuir, Strathclyde, Scotland, Sheet SO30E. 
Reference(s):
Paterson, I B, Hall, I H S & Stephenson, D. 1990. Geology of the Greenock district: Memoir for 1:50000 geological sheet 30W and part of sheet 29E (Scotland). 
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). 
Browne, M A E, Smith, R A and Aitken, A M. 2001. A lithostratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. Version 3. British Geological Survey Research Report RR/01/04. 
Paterson, I B and Hall, I H S, 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S030 S030 S039 S038