| Computer Code: |
CMV |
Preferred Map Code: |
CMP |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Varied sequence of meta volcaniclastic and meta tuffaceous sandstones, siltstones and mudstones with vitric tuffs and volcanic block-breccias (mainly dacitic). |
| Definition of Lower Boundary: |
Coarse-grained tuffs and breccias of the Benscliffe Breccia Member sharply overlie green-grey thinly bedded to laminated fine- to medium-grained volcaniclastic beds of the Blackbrook Reservoir Formation. |
| Definition of Upper Boundary: |
Sharply, possible unconformably overlain by the Brand Group. Latter consists locally of small-pebble conglomerate or coarse-grained volcaniclastic sandstone of the Hanging Rocks Conglomerate Formation. |
| Thickness: |
Approximately 2000m |
| Geographical Limits: |
The unit is distributed within the centre and flanks of the Charnwood anticline, generally between Nanpantan, Benscliffe Wood and High Sharpley. |
| Parent Unit: |
Charnian Supergroup (CHA)
|
| Previous Name(s): |
Maplewell Series [Obsolete Name and Code: Use CMV]
(-147)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
North-west Charnwood Forest (Charnwood Lodge Reserve). |
| Type Area |
Eastern Charnwood Forest (Nanpantan-Outwoods). |
| Reference(s): |
| Carney, J N. 1994. Geology of the Thringstone, Shepshed and Loughborough districts (SK41NW, SK41NE and SK51NW). British Geological Survey Technical Report WA/94/08. |
| Worssam, B C and Old, R A, 1988. Geology of the country around Coalville. Memoir of the British Geological Survey, Sheet 155 (England and Wales) |
| 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. |
| Watts, W W, 1947. Geology of the ancient rocks of Charnwood Forest, Leicestershire. Leicester: Leicester Literary and Philosophical Society. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E141
|
