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: | Sandy diamicton (till), sand, gravel, silt and clay. Clasts are derived predominantly from weathered Neoproterozoic metamorphic rocks (psammite, meta-wacke sandstone, slate) and Caledonian igneous rocks (granite, granodiorite, gabbro); deposited by glacial ice that radiated from the East Grampian Highlands. | ||
| Definition of Lower Boundary: | Unconformable on units of the Albion Glacigenic Group or bedrock. | ||
| Definition of Upper Boundary: | Surface or unconformable contact with units of the Britannia Catchments Group. | ||
| Thickness: | Very variable, generally 5 to 10 m; more than 40 m proved in some sections. | ||
| Geographical Limits: | The East Grampian Highlands, Cairngorm Mountains and Gaick Plateau. | ||
| Parent Unit: | Caledonia Glacigenic Group (CALI) | ||
| Previous Name(s): | East Grampian Drift Group [Obsolete Name and Code: Use EGD]
(-2779)
Inland tills [Obsolete Name and Code: Use EGD] (-2780) Inland Series (-885) East Grampian Glacigenic Group [Obsolete Name and Code: Use EGD] (-229) |
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| 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): | |||
| 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) | |||
| 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. | |||
| 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. | |||
| 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. | |||
| 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 | |||