The BGS Lexicon of Named Rock Units — Result Details

Kidderminster Formation [Obsolete name and code, use CHES]

Computer Code: KDM Preferred Map Code: Kdm
Status Code: Full
Age range: Early Triassic Epoch (TE) — Early Triassic Epoch (TE)
Lithological Description: Pebble conglomerates and reddish brown sandstones. The sandstones are cross-bedded and pebbly. The conglomerates have a reddish brown sandy matrix and consist mainly of pebbles of brown or purple quartzite, with quartz conglomerate and vein quartz. (Mitchell and others, 1962).
Definition of Lower Boundary: Unconformable on the Bridgnorth Sandstone, the Clent Breccia or older rocks.
Definition of Upper Boundary: Passage upwards into the Wildmoor Sandstone Formation, the upper boundary being placed arbitrarily above the highest pebble bed in the sequence.
Thickness: 0 to 200m
Geographical Limits: Worcestershire, West Midlands, south Staffordshire and west Warwickshire. (Worcester Basin, Stafford Basin, Knowle Basin).
Parent Unit: none recorded or not applicable
Previous Name(s): Bunter Pebble Beds [Obsolete Name And Code: Use CHES] (BNP)
Kidderminster Conglomerate Formation (-990)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Kidderminster and its vicinity, Worcestershire. Numerous exposures in and around the town. 
Reference(s):
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. 
Smith, D B, Brunstrom, R G W, Manning, D I, Simpson, S and Shotton, F W. 1974. A correlation of Permian rocks in the British Isles. Geological Society of London Special Report No. 5. 
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. 
Mitchell, G H, Pocock, R W, and Taylor, J H. 1962. Geology of the country around Droitwich, Abberley and Kidderminster. Memoir of the Geological Survey of Great Britain, Sheet 182 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E216 E183 E123 E139 E154 E167