The BGS Lexicon of Named Rock Units — Result Details

Strathmore Group

Computer Code: SEG Preferred Map Code: STMR
Status Code: Full
Age range: Emsian Age (DE) — Emsian Age (DE)
Lithological Description: Interbedded sandstone and siltstone. These interfinger with clast-supported conglomerate containing well-rounded boulders, cobbles and pebbles predominantly of psammite, quartzite and lava in areas adjacent to the Highland Boundary Fault. Siltstone and mudstone are interbedded with the sandstone, particularly in Strathallan.
Definition of Lower Boundary: At base of bright red, massive, poorly-sorted siltstone and silty sandstone of Cromlix Formation and its correlatives, where this overlies coarser-grained sandstone or conglomerate of Arbuthnott-Garvock Group. Locally diachronous in areas adjacent to Highland Boundary Fault where conglomerate and sandstone interfingers with Cromlix Mudstone Formation.
Definition of Upper Boundary: Not seen. Base of Upper Devonian succession in the northern Midland Valley is unconformable.
Thickness: 1800-2400m over much of the outcrop.
Geographical Limits: Northern Midland Valley, Arran to Stonehaven.
Parent Unit: Not Applicable (-)
Previous Name(s): Strathmore Group (SEG)
Strathmore Beds (-1811)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The banks of the river Teith, between Callander and Dunblane. 
Reference Section  Banks of River North Esk, near Gannochy. 
Type Area  Strathmore. See also type sections of component Cromlix Mudstone, Gannochy Conglomerate, and Teith formations. 
Reference(s):
Campbell, R, 1913. The geology of south-eastern Kincardineshire. Transactions of the Royal Society of Edinburgh, Vol.48, pp.923-960. 
Armstrong, M, Paterson, I B and Browne, M A E, 1985. Geology of the Perth and Dundee district. Memoir of the British Geological Survey, Sheets 48W, 48E and 49 (Scotland). 108pp. 
Carroll, S, 1995. Geology of the Auchenblae District. British Geological Survey Technical Report. WA/95/80. 
Carroll, S, 1995. Geology of the Laurencekirk District. British Geological Survey Technical Report No.WA/95/81. 
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). 
Geology of the Fettercairn area, 1:10000 sheets NO67NW, NO67NE, NO67SW, NO67SE and NO68SE (south of the Highland Boundary Fault) : part of 1:50000 sheets 66E (Banchory), 66W (Aboyne), 57W (Forfar) and 57E (Montrose): British Geological Survey, Onshore Geology Series, Technical report WA/95/91  
Allan, P A. 1940. The geology of the Highland Border from Glen Almond to Glen Artney. Transactions of the Royal Society of Edinburgh. Vol.60, p.185. 
House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. 
Armstrong, M and Paterson, I B, 1970. The Lower Old Red Sandstone of the Strathmore Region. Report of the Institute of Geological Sciences No.70/12 
Hickling, G, 1908. The Old Red Sandstone of Forfarshire Geological Magazine, Vol.5 (new series) p.396-408. 
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, 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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S066 S030 S030 S038 S038 S039 S039 S047 S048 S056 S056 S057 S057 S066 S013 S338 S048 S047 S047