The BGS Lexicon of Named Rock Units — Result Details

Great Easby Clay Formation

Computer Code: GECL Preferred Map Code: GE
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Dark reddish brown clay, silt and very fine-grained sand, generally thinly laminated and locally varved. Sparse dropstones.
Definition of Lower Boundary: Unconformable boundary with red diamicton of the underlying Gillcambon Till Formation, or on bedrock.
Definition of Upper Boundary: Generally a sharp, planar, or gradational glacitectonic boundary with red diamicton correlated with the Plumpe Bridge Till Member of the Gretna Till Formation.
Thickness: 10m or more.
Geographical Limits: The Solway Lowlands around Carlisle.
Parent Unit: Irish Sea Coast Glacigenic Subgroup (ISCG)
Previous Name(s): Glaciolacustrine Deposits (GLLD)
Alternative Name(s): Great Easby Member
Stratotypes:
Type Section  River cliff sections in the southern bank of the River Irthing. 3km northeast of Brampton, Cumbria. Huddart (1970), Huddart and Glasser (2002). 
Reference(s):
Trotter, F M and Hollingworth, S E. 1932. The geology of the Brampton District. Memoir of the Geological Survey, Sheet 18. 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Huddart, D. 1970. Aspects of glacial sedimentation in the Cumberland lowland. Unpublished PhD thesis, University of Reading. 
Huddart, D and Glasser, N F (editors). 2002. Quaternary of Northern England. Geological Conservation Review Series, No.25. [Peterborough: Joint Nature Conservation Committee.] 745pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable