The BGS Lexicon of Named Rock Units — Result Details

Shepshed Sandstone Member

Computer Code: SHSA Preferred Map Code: SHS
Status Code: Full
Age range: Anisian Age (TA) — Ladinian Age (TD)
Lithological Description: Red to brown, angular or subangular, fine- to medium-grained sandstone, generally parallel-bedded, with concentrations of angular Charnian clasts forming matrix-supported conglomerates. Siltstones and mudstones in upper part.
Definition of Lower Boundary: Unconformable on Precambrian rocks of Charnian Supergroup, and on Carboniferous rocks north and east of Charnwood Forest.
Definition of Upper Boundary: Gradational, by increase in siltstones and mudstones, into the Sneinton Formation (Mercia Mudstone Group). Probably also grades laterally into the main part of the Bromsgrove Formation.
Thickness: 0-30m, may be 60m locally in palaeovalley situation in Charnwood Forest.
Geographical Limits: Mainly restricted to northern part of Charnwood Forest, between Newhurst Quarry and Whitwick. May also occur farther west, near Coleorton.
Parent Unit: Helsby Sandstone Formation (HEY)
Previous Name(s): Lower Keuper Sandstone And Waterstones (-3674)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Southern face of Newhurst Quarry (part of Charnwood Quarry complex). 
Reference(s):
Carney, J N, 1994. Geology of the Thringstone, Shepshed and Loughborough districts (SK41NW, SK41NE and SK51NW). British Geological Survey Technical Report WA/94/08. 
Bosworth, T O, 1912. The Keuper Marls around Charnwood Forest. Leicester Literary and Philosophical Society. (Leicester: Thomley and Son). 
Fox-Strangways, C, 1905. The geology of the country between Derby, Burton-on-Trent, Ashby de la Zouch and Loughborough. Memoir of the Geological Survey of Great Britain, Sheet 141 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E141