The BGS Lexicon of Named Rock Units — Result Details

Lochton Sand And Gravel Formation

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):
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) 
Brown, I M. 1994. Former glacial lakes in the Dee valley: origin, drainage and significance. Scottish Journal of Geology, Vol.30 (2), 147 - 158. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S066 S067 S066 S065 S077