The BGS Lexicon of Named Rock Units — Result Details
Caledonia Glacigenic Group
Computer Code: | CALI | Preferred Map Code: | CAL |
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Status Code: | Full | ||
Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
Lithological Description: | Tills (diamictons), sands, gravels, silts and clays. Sands and gravels contain clasts derived from rocks cropping out throughout northern England, Scotland and Wales, and offshore. | ||
Definition of Lower Boundary: | Sharp, unconformable contact with bedrock or units of the Albion Glacigenic Group. | ||
Definition of Upper Boundary: | At the ground surface or at unconformable contact with various units of the Britannia Catchments Group or the British Coastal Deposits Group. | ||
Thickness: | Up to 120 m. | ||
Geographical Limits: | The whole of Great Britain lying to the north and west of the Devensian glacial limit. | ||
Parent Unit: | Great Britain Superficial Deposits Supergroup (GBG) | ||
Previous Name(s): | South Britain Glacigenic Group [Obsolete Name And Code: See ALBI And CALI]
(SBRG)
Newer Drift [Obsolete Name and Code: Use CALI, NBRG] (-3269) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Great Britain lying to the north and west of the Devension glacial limit. Bowen, 1999. See also the stratotypes of the constituent subgroups and formations. | ||
Reference(s): | |||
Ehlers, J, Gibbard, P L and Rose, J [editors]. 1991. Glacial deposits in Great Britain and Ireland. Balkema: Rotterdam, 580pp. | |||
Boulton, G S. 1992. Quaternary. 413-444 in Geology of England and Wales. Duff, P M D, and Smith, A J (editors). (London: The Geological Society.) | |||
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. | |||
Boulton, G S, Peacock, J D, and Sutherland, D G. 2002. Quaternary. 409-430 in Geology of Scotland (4th edition). Trewin, N H (editor). (London: The Geological Society.) | |||
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
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. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |