| Computer Code: |
HBR |
Preferred Map Code: |
HBr |
| Status Code: |
Full |
| Age range: |
Stephanian Stage (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 [Obsolete Name and Code: Use HBR]
(-4088)
|
| 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): |
| 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. |
| 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
E199
|
