The BGS Lexicon of Named Rock Units — Result Details

HAFFIELD BRECCIA FORMATION
Computer Code: HBR  Status Code: FORMAL ENTRY 
Preferred Map Code: HBr 
Age or Age Range: [ CS ] STEPHANIAN  to [ PL ] EARLY PERMIAN 
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: Parent Unit Code:
WARWICKSHIRE GROUP  WAWK
Previous Name(s): Previous Code(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. 
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. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
Map Code Sheet Name
E  199
E  216

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