| Computer Code: |
BCT |
Preferred Map Code: |
BcT |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Medium- to thickly-bedded blue-grey, fine- to coarse-grained tuffs and tuffaceous siltstones, and beds of massive, grey, dacitic lithic-crystal tuff and lapilli tuff. |
| Definition of Lower Boundary: |
Not exposed; thought to be sharp to gradational on grey lapilli tuff and volcanic breccia of the Benscliffe Breccia Member. |
| Definition of Upper Boundary: |
Not exposed, but probably sharply overlain by volcaniclastic sandstones and breccia of the Sandhills Lodge Member. |
| Thickness: |
c.880m |
| Geographical Limits: |
From Nanpantan Hills it extends southwards to Beacon Hill, Broombriggs Hill and Ling Hill. Poorly exposed west of Benscliffe Wood. |
| Parent Unit: |
Beacon Hill Formation (CMBH)
|
| Previous Name(s): |
Beacon Tuffs Member [Obsolete Name and Code: Use BCT]
(-3827)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Beacon Hill. |
| Reference Section |
South of Nanpantan Hall. |
| 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. |
| 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) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E141
|
