The BGS Lexicon of Named Rock Units — Result Details

Elwick Moraine Member

Computer Code: ELWK Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Varied lithologies including ill-sorted gravel, red sand and red sandy diamicton with clasts of limestone and dolostone of the Zechstein Group (formerly Magnesian Limestone), Carboniferous lithologies (sandstone, limestone) and Cheviot andesite. Forming linear ridges and mounds with kettleholes.
Definition of Lower Boundary: Uneven, unconformable contact on bedrock or dark brown stony sandy silty clay diamicton of the Wear Till Formation. Lateral unconformable contact with reddish brown stony sandy silty clay diamicton of the Horden Till Formation.
Definition of Upper Boundary: Generally the ground surface.
Thickness: To about 12m
Geographical Limits: Lowlands of County Durham.
Parent Unit: Horden Till Formation (HNTI)
Previous Name(s): Elwick Member (-3385)
Morainic Drift [Not Recommended For Future Use: See MORD] (DOD)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  A belt of ridges, mounds and kettleholes stretching from Easington Lane southwards via Shotton and Sheraton to Elwick in eastern County Durham, bounded to the east by the Horden Till Formation. Smith and Francis, 1967, fig.28, 215-6. 
Reference(s):
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable