The BGS Lexicon of Named Rock Units — Result Details
Benscliffe Breccia Member [Duplicate: use CMBA]
| Computer Code: | BENS | Preferred Map Code: | Ben |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
| Lithological Description: | [Duplicate: use CMBA] Massive to thickly bedded sequence of dacitic volcanic breccia, lapilli tuffs and tuffaceous mudstones/siltstones. | ||
| Definition of Lower Boundary: | Not exposed; rests on fine-grained beds of Blackbrook Reservoir Formation, latter greenish-grey and commonly well-laminated. | ||
| Definition of Upper Boundary: | Overlain by Beacon Tuff Member in east, and by Charnwood Lodge Volcanic Formation (undivided beds) in west. | ||
| Thickness: | c.21m in east, possibly over 100m in west. | ||
| Geographical Limits: | Discontinuously exposed from Nanpantan (Rhododendron Hill) south to Benscliffe Wood, then north to Flat Hill. Possibly merges with Kite Hill Tuff north of latter. | ||
| Parent Unit: | none recorded or not applicable | ||
| Previous Name(s): | Benscliffe Agglomerate [Obsolete Name and Code: Use CMBA, BENS]
(-2596)
Felsitic agglomerate [Obsolete Name and Code: Use CMBA, BENS] (-3204) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Hanging Stone to Flat Hill, Charnwood Lodge Nature Reserve. | ||
| Type Section | Benscliffe Wood. | ||
| 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. | |||
| Watts, W W, 1947. Geology of the ancient rocks of Charnwood Forest, Leicestershire. Leicester: Leicester Literary and Philosophical Society. | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E155 E141 | |||