The BGS Lexicon of Named Rock Units — Result Details

Mancetter Shale Formation

Computer Code: MCSH Preferred Map Code: McSh
Status Code: Full
Age range: St David's Series (ED) — St David's Series (ED)
Lithological Description: Grey to dark grey, sporadically greenish, micaceous and pyritic mudstone with common current ripple-bedded sandy wisps. Common beds of grey, fine-grained, disturbed, glauconitic sandstone.
Definition of Lower Boundary: Sedimentary break. Basal conglomerate with mudstone clasts and quartz pebbles rests on dark grey mudstone of Abbey Formation.
Definition of Upper Boundary: Gradational with Outwoods Formation. Taken at level below which dark pyritic mudstone, typical of Outwoods Formation, becomes insignificant.
Thickness: General range 30 - >75m. 58m in reference section.
Geographical Limits: Extends from Nuneaton, northwestwards to the southern suburbs of Atherstone (SP 3630 9171 - SP 3063 9715).
Parent Unit: Stockingford Shale Group (SSH)
Previous Name(s): Mancetter Grits And Shales (-2316)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Merevale No.3 Borehole, (SP39NW/7) 518ft 3ins-709ft 3ins 
Type Area  Sparse exposures and brash on a ridge 300m west of White House Farm. 
Reference(s):
Taylor, K and Rushton, A W A, 1971. The pre-Westphalian geology of the Warwickshire Coalfield. Bulletin of the Geological Survey of Great Britain, No.35. 
Baldock, J W, 1991. Geology of the Hartshill and Stockingford districts, Nuneaton. British Geological Survey Technical Report, WA/91/60. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E155