The BGS Lexicon of Named Rock Units — Result Details

Kirkham Till Member

Computer Code: KMGL Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: A glacigenic sequence of till (sandy, gravelly clay with cobbles and boulders) and laminated silt and clay separated by variably continuous lenses or beds of sand and gravel. Erratics are dominated by Carboniferous rocks and Lake District and Irish Sea derived bedrock.
Definition of Lower Boundary: Unconformable and locally deeply incised contact with bedrock.
Definition of Upper Boundary: Either the ground surface or overlain by various units of the Britannia Catchments Group and British Coastal Deposits Group.
Thickness: Highly variable, locally up to 100m
Geographical Limits: North Lancashire, approximating to an area between the Lake District Massif and the Kirkham Moraine.
Parent Unit: Stockport Glacigenic Formation (STPTG)
Previous Name(s): Kirkham Formation (-4732)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Kirkham, Lancashire; complex of till, outwash and lacustrine silts and clays within the Kirkham Moraine of Cresswall (1967). Longworth in Johnson (1985); Gresswell (1967). 
Reference(s):
Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. 
Longworth, D. 1985. The Quaternary History of the Lancashire Plain. 178-200 in Johnson, R H (Editor), The Geomorphology of northwest England. [Manchester: Manchester University Press.] 
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. 
Gresswell, R K. 1967. Physical Geography. [London: Longmans.] 504pp. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable