The BGS Lexicon of Named Rock Units — Result Details

Long Eaton Formation

Computer Code: LOE Preferred Map Code: LE
Status Code: Pending Upgrade
Age range: Chadian Substage (CI) — Asbian Substage (CR)
Lithological Description: Dark grey or brown calcareous mudstones and siltstones, with thin beds of bioclastic limestone, graded calcisiltite, packstone and grainstone (description from borehole chip samples).
Definition of Lower Boundary: The base is not proved by borehole, although known locally in the Long Eaton No. 1 Borehole to pass down to nodular anhydrite and interbedded dolostone, possibly a lateral equivalent of the Hathern Anhydrite Formation.
Definition of Upper Boundary: The base of lowest, thickly bedded turbiditic limestone of the Lockington Limestone Formation.
Thickness: At least 2060m, and possibly up to 4000m thick in the Widmerpool Half-Graben.
Geographical Limits: Does not appear at outcrop, but lies at depth within the Hathern Shelf and possibly the Widmerpool Half-Graben, in the Long Eaton No. 1 Borehole (SK43SE/161) [SK 4640 3166].
Parent Unit: Craven Group (CRAV)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Long Eaton No.1 Borehole (SK43SE/161), partially cored, from 880m to 2747m depth. 
Reference Section  Ratcliffe on Soar Borehole (SK52NW/72), from 1157m to 1832m depth. 
Reference(s):
Brandon, A, 1996. Geology of the Lower Derwent Valley: 1:10 000 Sheets SK33SE, SK43SW and SK43SE. British Geological Survey Technical Report WA/96/07. 
Carney, J N and Cooper, A H, 1997. Geology of the West Leake area: 1:10 000 Sheet SK52NW. British Geological Survey Technical Report WA/97/46. 
Carney, J N, Ambrose, K and Brandon, A. 2001. Geology of the country between Burton, Loughborough and Derby. Description of 1:50k Sheet 141 (England and Wales). 
Riley, N J. 1997. Forminiferal biostratigraphy of the Carboniferous interval in Fina Long Eaton No.1 Borehole. British Geological Survey Technical Report, WH/97/46C. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E141