The BGS Lexicon of Named Rock Units — Result Details

Bromsgrove Sandstone Formation [Obsolete: use HEY]

Computer Code: BMS Preferred Map Code: BmS
Status Code: Index Level
Age range: Early Triassic Epoch (TE) — Anisian Age (TA)
Lithological Description: [Obsolete: use HEY] Sandstones, red, brown and grey, commonly pebbly or conglomeratic at the bases of beds, interbedded with red and brown siltstones and mudstones.
Definition of Lower Boundary: Disconformable on Wildmoor Formation or older formations; taken at base of lowest pebbly bed with chips of unweathered feldspar (Wills, 1976 p.37,99) at outcrop in type area.
Definition of Upper Boundary: Transitional at base of Mercia Mudstone Group.
Thickness: 0->300m (Redditch area), 15-40m (Stoke-on-Trent area), c.500m (Worcester area).
Geographical Limits: Stafford and Worcester basins.
Parent Unit: none recorded or not applicable
Previous Name(s): Keuper Sandstone, Lower [Obsolete name and code, use HEY] (-709)
Alternative Name(s): none recorded or not applicable
Reference Section  Metropolitan-Cammel Ltd, Saltley, Birmingham borehole 100/1944 (Wills, 1970). 25.9-217.2m in depth. (Wills,1976, p 134) (85ft-712ft 6in). 
Type Area  Bromsgrove, north Worcestershire (definition of Warrington, et al, 1980); basal Burcot Breccia exposures in Wills, 1976, p 37; other localities, Old, et al, 1991, p 18-30. 
Reference Section  Sugarbrook No 1 Borehole, Stoke Prior, near Bromsgrove, depth 33.5-281.8m (SO 96NE/1) (Wills, 1970; 1976, p 107). 
Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. 
Howard, A S, Warrington, G, Ambrose, K, and Rees, J G. 2008. A formational framework for the Mercia Mudstone Group (Triassic) of England and Wales. British Geological Survey Research Report, RR/08/04. 
Ambrose, K, Hough, E, Smith, N J P, and Warrington, G. 2014. Lithostratigraphy of the Sherwood Sandstone Group of England, Wales and south-west Scotland. British Geological Survey Research Report, RR/14/01. 
Wills, L J. 1976. The Trias of Worcestershire and Warwickshire. Report of the Institute of Geological Sciences, No.76/2. 
Wills, L J. 1970. The Triassic succession in the central Midlands in its regional setting. Quarterly Journal of the Geological Society of London, Vol.126, 225-285. 
Old R A, Hamblin, R J O, Ambrose, K, and Warrington G. 1991. Geology of the country around Redditch. Memoir of the British Geological Survey, Sheet 183 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E216 E155 E184 E183 E123 E140 E199 E139 E154 E201 E217 E236 E167 E141