The BGS Lexicon of Named Rock Units — Result Details

Lobbs Sand And Gravel Formation

Computer Code: LOBSG Preferred Map Code: Lo
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Mainly sand and gravel with subordinate beds of silt and clay, containing clasts mainly of "Borrowdale Volcanic Group" lithologies, slate and Threlkeld microgranite. Forming both moundy and terraced spreads of glaciofluvial sand and gravel in the northern Lake District.
Definition of Lower Boundary: Generally an erosional, unconformable boundary on olive grey, sandy, silty, clayey, stony diamicton (Threlkeld Till Formation).
Definition of Upper Boundary: Mostly ground surface or overlain unconformably by Flandrian deposits.
Thickness: To 15m
Geographical Limits: Northeast Lake District, Cumbria.
Parent Unit: Central Cumbria Glacigenic Subgroup (CCGL)
Previous Name(s): Lobbs Member (-1039)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Keswick, Vale of St. Johns and Naddle, Cumbria. Boardman (1982, 1991). 
Reference(s):
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Boardman, J. 1991. Glacial deposits in the English Lake District, 231-260 in Glacial deposits in Great Britain and Ireland. Ehlers, J, Gibbard, P L and Rose, J (editors). (Rotterdam:Balkema.) 
Boardman, J. 1982. Glacial geomorphology of the Keswick area, northern Cumbria. Proceedings of the Cumberland Geological Society, Vol.4, 115-134. 
Boardman, J, Lowe, J J, Holyoak, D T, and Wilson, P. 1981. Northeastern Lake District: The valleys of Mosedale and Thornsgill, 7-39 in Field Guide to Eastern Cumbria. J Boardman (ed.) Quaternary Research Association, London, 128pp. 
Boardman, J. 2002. Thornsgill and Mosedale, 46-51 in Huddart, D and Glasser, N F (editors), 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