The BGS Lexicon of Named Rock Units — Result Details

Allt An T-Srathain Member

Computer Code: ANSR Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Red-brown (2.5YR 4/4) well-consolidated gravel-rich diamicton with a sand-dominated matrix.
Definition of Lower Boundary: Gradational to erosional with, and locally reworking, the top of the underlying Ullapool Gravel Formation.
Definition of Upper Boundary: Present-day land surface or below local peat accumulations.
Thickness: 1-3m.
Geographical Limits: Exposed onshore in and around the Allt an t-Srathain burn, NW of Ullapool.
Parent Unit: Assynt Glacigenic Formation (ASGL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Allt an t-Srathain burn, adjacent to an unclassified road, about 500 m to the SE of Rhue Stoker, M S and Bradwell, T. In press. Quaternary geology of the Summer Isles region - a brief explanation of the marine environment map. Sheet Explanation of the British Geological Survey. 1:50 000 Special Sheet Summer Isles (Scotland). 
Reference(s):
Stoker, M S and Bradwell, T. In press. Quaternary geology of the Summer Isles region - a brief explanation of the marine environment map. Sheet Explanation of the British Geological Survey. 1:50 000 Special Sheet Summer Isles (Scotland). 
Bradwell, T and Stoker, M S. 2010. Quaternary Lithostratigraphy of the NW Highlands. In: Lukas, S. & Bradwell, T. (eds), The Quaternary of Western Sutherland and adjacent areas. (London: Quaternary Research Association), 29-37. 
Stoker, M S, Bradwell, T, Howe, J A, Wilkinson, I P & McIntyre, K. 2009. Lateglacial ice-cap dynamics in NW Scotland: evidence from the fjords of the Summer Isles region. Quaternary Science Reviews, 28, 3161-3184. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S101