| Computer Code: |
CBHR |
Preferred Map Code: |
CBHR |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Grades from a basal facies of poorly sorted, grey, small-pebble conglomerates interbedded with coarse-grained sandstones, to graded sandstones and thin conglomerates, with grey tuffaceous mudstones and siltstones above. |
| Definition of Lower Boundary: |
No longer seen, formerly stated to sharply overlie "coarse green hornstones" that are now referred to the Bradgate Formation. |
| Definition of Upper Boundary: |
Not seen. The unit fines upwards, towards the base of the overlying Swithland Formation, but an unconformity is suspected since the latter is now regarded as of Early Cambrian age. |
| Thickness: |
Variable, 0 to 47m |
| Geographical Limits: |
Restricted to Charnwood Forest, the most definite occurrences are between Bradgate Park and Charnwood Forest Golf Course. |
| Parent Unit: |
Maplewell Group (CMV)
|
| Previous Name(s): |
Hanging Rocks Conglomerate Member [Obsolete Name and Code: Use CBHR]
(-2667)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
On Charnwood Forest Golf Course, to the east and west of the 18th hole. |
| Reference Section |
Small exposure on side of south-facing slope in Bradgate Park, about 500m south of the Roecliffe Road entrance. |
| Reference(s): |
| Moseley, J and Ford, T D, 1985. A stratigraphic revision of the Late Precambrian rocks of Charnwood Forest, Leicestershire. Mercian Geologist, Vol.10(I), 1-18. |
| Carney, J N. 1994. Geology of the Thringstone, Shepshed and Loughborough districts (SK41NW, SK41NE and SK51NW). British Geological Survey Technical Report WA/94/08. |
| McIlroy, D, Brasier, M D and Moseley J. 1998. The Proterozoic - Cambrian transition within the 'Charnian Supergroup' of central England and the antiquity of the Ediacara fauna. Journal of the Geological Society of London, Vol. 155, 401 - 413. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E155
|
