The BGS Lexicon of Named Rock Units — Result Details

Caledonia Glacigenic Group

Computer Code: CALI Preferred Map Code: CAL
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 (-3269)
Alternative Name(s): none recorded or not applicable
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. 
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 Duff, P M D and Smith, A J (eds) Geology of England and Wales. [London: The Geological Society.] 
Boulton, G S, Peacock, J D and Sutherland, D G. 2002. Quaternary. 409-430 in Trewin, N H [editor], Geology of Scotland. [4th edition]. [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. 
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