Computer Code: |
LOSG |
Preferred Map Code: |
Lo |
Status Code: |
Full |
Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
Lithological Description: |
Sand and gravel composed predominantly of clasts of Neoproterozoic metamorphic rocks and Caledonian igneous rocks. |
Definition of Lower Boundary: |
Unconformable on bedrock or conformable on Banchory Till Formation or Glen Dye Silts Formation. |
Definition of Upper Boundary: |
At ground surface or unconformably overlain by Flandrian deposits. |
Thickness: |
Very variable, generally 3 to 5m; 14m proved in boreholes. |
Geographical Limits: |
The East Grampian Highlands. |
Parent Unit: |
East Grampian Glacigenic Subgroup (EGD)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
BGS borehole NO69SE/15 at Heughhead, c 3km southwest of Banchory, 0.4 to 5.2m depth in borehole. |
Reference Section |
BGS section and pit reference number NO69SW/6, 300m southwest of Easter Clune Farm, 0.3 to 5.0m depth. |
Partial Type Section |
Lochton Gravel Pit, 6km southeast of Banchory, BGS section and pit reference number NO79SE/1, 0 to 5.4m depth. |
Reference(s): |
Brown, I M. 1994. Former glacial lakes in the Dee valley: origin, drainage and significance. Scottish Journal of Geology, Vol. 30(2), 147-158. |
Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S066
S067
S066
S065
S077
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