The BGS Lexicon of Named Rock Units — Result Details

Haffield Breccia Formation
Computer Code: HBR Preferred Map Code: HBr
Status Code: Full
Age range: Stephanian Age (CS) — Cisuralian Epoch (PLC)
Lithological Description: Unsorted clast-supported breccio-conglomerate, weakly cemented; clasts of igneous volcanic and Lower Palaeozoic lithologies.
Definition of Lower Boundary: Unconformable on Coal Measures and older rocks.
Definition of Upper Boundary: Unconformably overlain by Bridgnorth Sandstone Formation.
Thickness: To 75m
Geographical Limits: Malvern - Abberley Hills; equates with Clent Breccia of West Midlands. (Mitchell, and others, 1962).
Parent Unit: Warwickshire Group (WAWK)
Previous Name(s): HAFFIELD CONGLOMERATE
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Vicinity of Haffield House, Haffield, (Hereford and Worcester) where there are disused quarries. (Worssam, and others, 1989). 
Reference(s):
Mitchell, G H, Pocock, R W and Taylor, J H, 1962. Geology of the country around Droitwich, Abberley and Kidderminster. 
Phillips, J, 1848. The Malvern Hills compared with the Palaeozoic districts of Abberley, Woolhope, May Hill, Tortworth and Usk. Memoir of the Geological Survey of Great Britain, Vol.2, Part 1. 
Worssam, B C, Ellison, R A, and Moorlock, B S P. 1989. Geology of the country around Tewkesbury. Memoir of the British Geological Survey, Sheet 216 (England and Wales). 
Groom, T T, 1902. The sequence of the Cambrian and associated beds of the Malvern Hills. Quarterly Journal of the Geological Society of London, Vol.58, p.59-135. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E216 E199
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