The BGS Lexicon of Named Rock Units — Result Details

Chelford Sand Formation

Computer Code: CHFDS Preferred Map Code: notEntered
Status Code: Full
Age range: Wolstonian Stage (QO) — Devensian Stage (QD)
Lithological Description: White to "buff", well-sorted sand, with minor gravel, silt and peat lenses with sporadic in situ tree stumps and wood clasts.
Definition of Lower Boundary: Irregular contact with bedrock or deposits of the Oakwood Glacigenic Formation.
Definition of Upper Boundary: Unconformable beneath till, sand and gravel of the Stockport Glacigenic Formation.
Thickness: To 20m.
Geographical Limits: Cheshire.
Parent Unit: Britannia Catchments Group (BCAT)
Previous Name(s): Chelford Formation [Obsolete Name and Code: Use CHFDS] (-2693)
Congleton Sand [Obsolete Name and Code: Use CHFDS] (-2080)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Farm Wood Quarry, Chelford, where three members of the Chelford Sand Formation are identified, comprising organic-rich sand, peat and organic-rich soil. Simpson and West, 1958. 
Partial Type Section  New Windsor Road Quarry, Congleton. White sands known also as the Congleton Sand. Evans et al, 1968. 
Reference(s):
Worsley, P. 1991. Glacial deposits of the lowlands between the Mersey and Severn rivers. 203-211 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial deposits in Great Britain and Ireland. 
Maddy, D. 1999. English Midlands Chapter 3 in Bowen, D Q (Editor), A revised correlation of the Quaternary deposits in the British Isles. Geological Society Special Report, No.23. 
Evans, W B, Wilson, A A, Taylor, B J and Price, D. 1968. Geology of the country around Macclesfield, Congleton, Crewe and Middlewich. Memoir of the Geological Survey of Great Britain, Sheet 110 (England and Wales). 
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. 
Simpson, I M and West, R G. 1958. On the stratigraphy and palaeobotany of a Late Pleistocene organic deposit at Chelford, Cheshire. New Phytologist, Vol.57, 239-250. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable