The BGS Lexicon of Named Rock Units — Result Details

Tile Hill Mudstone Formation

Computer Code: TLM Preferred Map Code: TLM
Status Code: Full
Age range: Asturian Substage (CAS) — Stephanian Stage (CS)
Lithological Description: Red-brown mudstones with subordinate thin red-brown and green, flaggy, fine- to coarse-grained sandstones with rare thin conglomeratic lenses.
Definition of Lower Boundary: At the first red-brown mudstone, above the highest mappable persistent red-brown sandstone of the Salop Formation.
Definition of Upper Boundary: At the change from red-brown mudstone, to the predominantly red-brown sandstone of the Kenilworth Sandstone Formation.
Thickness: 280 m thick.
Geographical Limits: Extensive outcrops in the southern part of the Warwickshire Coalfield.
Parent Unit: Warwickshire Group (WAWK)
Previous Name(s): Tile Hill Marl Group (-2489)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Mount Nod No.2 Borehole SP27NE/46. Basal 38.3 m of formation recorded as 'hard red marl' with 'sandy beds'. 
Reference Section  Tile Hill Railway Station Borehole SP27NE/1. Mudstones with subordinate sandstones recorded to 211.3 m depth. 
Type Area  Tile Hill,Warwickshire. Poor exposures, but see reference sections. 
Reference Section  Stream section north of Broad Lane, Tile Hill, in flaggy red-brown sandstone and interbedded mudstone. 
Reference(s):
Shotton, F W, 1929. The geology of the country around Kenilworth (Warwickshire). Quarterly Journal of the Geological Society of London, Vol.28, 167 - 222. 
Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 1999. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. 
Old, R A, Sumbler, M G and Ambrose, K, 1987. Geology of the country around Warwick. Memoir of the British Geological Survey, Sheet 184 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E184 E183 E168 E169