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): NEWER DRIFT
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The whole of Great Britain lying to the north and west of the Devension glacial limit. 
Reference(s):
McMillan, A A, Hamblin, R J O and Merritt, J W. 2004. An overview of the lithostratigraphical framework for Quaternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report. RR/04/04. 
Ehlers, J, Gibbard, P L and Rose, J [editors]. 1991. Glacial deposits in Great Britain and Ireland. Balkema: Rotterdam, 580pp. 
Bowen, D Q (Editor). 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society of London Special Report, No.23. 
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.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable