The BGS Lexicon of Named Rock Units — Result Details

East Grampian (Albion) Glacigenic Subgroup

Computer Code: EGAG Preferred Map Code: EGA
Status Code: Full
Age range: Mid Pleistocene Epoch (QPM) — Mid Pleistocene Epoch (QPM)
Lithological Description: Sandy diamictons (till), sands, gravels, silts and clays. Clasts are derived predominantly from weathered Neoproterozoic metamorphic rocks (psammite, meta-wacke sandstone, slate) and Caledonian igneous rocks (granite, granodiorite, gabbro). Deposited from ice that radiated from the Eastern Grampian mountains.
Definition of Lower Boundary: Sharp, unconformable contact with bedrock.
Definition of Upper Boundary: Unconformably overlain by deposits of the Caledonia Glacigenic Group.
Thickness: Up to 10 m.
Geographical Limits: The east Grampian Highlands, Cairngorm Mountains and Gaick Plateau.
Parent Unit: Albion Glacigenic Group (ALBI)
Previous Name(s): Inland Series (-885)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Banchory area of Kincardineshire and Buchan. Merritt et al. 2003. See also the stratotypes of constituent formations, including the Bellscamphie Till, Tillybrex Sand and Gravel, Pishlinn Burn Gravel and Leys Gravel. 
Reference(s):
McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. 
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) 
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.) 
McMillan, A A, Hamblin, R J O and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quarternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report RR/04/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable