Computer Code: |
ANHA |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
Lithological Description: |
Probably overcompacted diamicton and sandy gravel in mid-loch region, including possible glacitectonised silt and clay. Probable debris-flow diamictons in deeper water. |
Definition of Lower Boundary: |
Unconformable glacitectonic boundary with (parent) Assynt Glacigenic Formation below. |
Definition of Upper Boundary: |
Unconformably overlain by Summer Isles Formation in outer loch. Locally downlapped by Ullapool Gravel Formation in mid-loch region; otherwise exposed or covered by Holocene lag. |
Thickness: |
Up to 12m. |
Geographical Limits: |
Mid- to outer Loch Broom (between Corry Point and middle of outer loch). Possibly including coastal fringes, e.g. Newton Loggie. |
Parent Unit: |
Assynt Glacigenic Formation (ASGL)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
General seabed area between Corry Point and Ullapool Point, Loch Broom (Stoker et al., 2009). |
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). |
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. |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |