The BGS Lexicon of Named Rock Units — Result Details

Limekiln Gill Gravel Formation

Computer Code: LGGR Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Partially cemented gravel typically containing a high (50-60%) proportion of locally derived limestone and dolomite pebbles of the Zechstein Group (formerly Magnesian Limestone) and a varied suite of far-travelled clasts including Carboniferous lithologies, andesite, granite, gneisse, schist, flint, quartz, quatzite and dolerite, together with unabraded shell fragments.
Definition of Lower Boundary: Unconformable, erosional, channelled contact with limestones and dolostones of the Zechstein Group (formerly Magnesian Limestone).
Definition of Upper Boundary: Generally a sharp, subhorizontal, planar to gently undulating contact with dark grey, stiff, sandy silty stony clay diamicton of the Blackhall Till Formation.
Thickness: Up to 6m known
Geographical Limits: Coast of County Durham.
Parent Unit: North Sea Coast Glacigenic Subgroup (NSG)
Previous Name(s): Lower Gravels (-1023)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff section 490m south of Horden Point. 
Reference(s):
Huddart, D. 2002. Warren House Gill. 51-56 in Huddart, D and Glasser, N F (editors), Quaternary of Northern England. Geological Conservation Review Series, No.25. [Peterborough: Joint Nature Conservation Committee.] 745pp. 
Smith, D B and Francis, E A. 1967. Geology of the country between Durham and West Hartlepool. Memoir of the Geological Survey of Great Britain, Sheet 27 (England and Wales). 
Francis, E A. 1970. Quaternary. 134-152 in Johnson, G A L, Geology of Durham County. [Newcastle: Natural History Society of Northumberland, Durham and Newcastle-upon-Tyne.] 152pp. 
Bridgland, D R, Horton, B P and Innes, J B. 1999. The Quaternary of northeast England. Field Guide. Quaternary Research Assocation, London. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable