The BGS Lexicon of Named Rock Units — Result Details

East Grampian Glacigenic Subgroup

Computer Code: EGD Preferred Map Code: EG
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Till, sand and gravel and laminated silt and clay, composed principally of decomposed Neoproterozoic metamorphic rocks and Caledonian igneous rocks; deposited by glacial ice that radiated from the East Grampian Highlands.
Definition of Lower Boundary: Unconformable: base of Banchory Till Formation.
Definition of Upper Boundary: Unconformable: top of Lochton Sand and Gravel Formation.
Thickness: Very variable, generally 5 to 10m; more than 40m proved in some sections.
Geographical Limits: The East Grampian Highlands.
Parent Unit: Caledonia Glacigenic Group (CALI)
Previous Name(s): East Grampian Drift Group (-2779)
Inland Tills (-2780)
Inland Series (-885)
East Grampian Glacigenic Group (-229)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Bogforran Gravel Pit, Banchory, BGS trial pit, registered number NO79SW/16. 
Reference Section  BGS borehole NO69SE/15 at Heughhead, c. 3km southwest of Banchory, 0.2m to 9.9m depth. 
Type Area  Banchory-Strachan area, Kincardineshire 
Reference(s):
Auton, C A, Merritt, J W and Ross, D L. 1988. The sand and gravel resources of the country around Inverurie and Dunecht, and between Banchory and Stonehaven, Grampian Region. British Geological Survey Technical Report WF/88/1. 
Hall, A M (Editor). 1984. Buchan Field Guide. Quaternary Research Association, Cambridge, 120pp. 
Hall, A M and Connell, E R. 1991. The glacial deposits of Buchan, northeast Scotland. 129-136 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial Deposits in Great Britain and Ireland. (Rotterdam: Balkema.) 
Auton, C A, Thomas, C W and Merritt, J W. 1990. The sand and gravel resources of the country around Strachan and between Auchenblae and Catterline. British Geological Survey Technical Report WF/90/7. 
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 S096 S064 S074 S076 S077 S086 S096 S065 S087 S087