The BGS Lexicon of Named Rock Units — Result Details

Stoer Group

Computer Code: TA Preferred Map Code: notEntered
Status Code: Full
Age range: Mesoproterozoic Era (AX) — Mesoproterozoic Era (AX)
Lithological Description: Breccia-conglomerate, sandstone, mudstone and a volcanic mudflow.
Definition of Lower Boundary: Drawn at base of massive breccias of the Stoer Group where it rests unconformably on Lewisian Gneiss Complex
Definition of Upper Boundary: Angular unconformity with the Torridon Group
Thickness: 700 - 1500 m (minimum)
Geographical Limits: Northwest Highlands, Scotland; east of the Coigach Fault, and west of the Moine Thrust
Parent Unit: Not Applicable (-)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Coastal section between Clachtoll and Rubh' a' Mhill Dheirg, Stoer peninsula, northwest Highlands. 
Reference Section  South side of Enard Bay, between Achnahaird bay and Garvie bay 
Upfold, R L. 1984. Tufted microbial (cyanobacterial) mats from the Proterozoic Stoer Group, Scotland. Geological Magazine. Vol.121(4), 351-355. 
Stewart, A D. 1990. Geochemistry, provenance and climate of the Upper Proterozoic Stoer Group in Scotland. Scottish Journal of Geology, Vol.26(2), 89-97. 
Piper, J D A and Poppleton, T J. 1991. Palaeomagnetic conglomerate tests on basal Stoer Group sediments, north-west Scotland. Scottish Journal of Geology, Vol.27(2), 97-106. 
Stewart, A D. 1969. Torridonian rocks of Scotland Reviewed. "In" Kay, M, (Editor). North Atlantic - geology and Continental Drift: A symposium. Memoir of the American Association of Petrological geology, Vol.12, p.595-608. 
Stewart, A D. 2002. The later Proterozoic Torridonian rocks of Scotland: their sedimentology, geochemistry and origin. Geological Society Memoir. Vol. 24. (The Geological Society.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S101 S091 S092