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
Stratotypes:
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 
Reference(s):
Stewart, A D. 2002. The later Proterozoic Torridonian rocks of Scotland: their sedimentology, geochemistry and origin. Geological Society Memoir. Vol. 24. (The Geological Society.) 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S101 S091 S092