The BGS Lexicon of Named Rock Units — Result Details
Beacon Hill Formation
Computer Code: | CMBH | Preferred Map Code: | BHI |
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Status Code: | Full | ||
Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
Lithological Description: | Varied sequence of grey to blue-grey epiclastic and tuffaceous mudstones, siltstones and sandstones with subordinate volcanic block-breccias and lithic-crystal tuffs. | ||
Definition of Lower Boundary: | Probable sharp contact, at base of Benscliffe Breccia Member, on grey-green, laminated, fine- to medium-grained volcaniclastic beds of the Blackbrook Reservoir Formation. | ||
Definition of Upper Boundary: | Sharply overlain by Bradgate Formation beds, of blue-grey, laminated volcaniclastic mudstones, siltstones and sandstones. | ||
Thickness: | About 1840m | ||
Geographical Limits: | Extends from Nanpantan Hills, south to Bradgate Park, then north-west to Ulverscroft Mill. | ||
Parent Unit: | Maplewell Group (CMV) | ||
Previous Name(s): | Beacon Hill Formation
(CMBH)
Beacon Hill Tuff Formation [Obsolete Name and Code: Use BHF, CMBH] (-3212) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | From Nanpantan Hills south to Bradgate Park. | ||
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. | |||
Watts, W W, 1947. Geology of the ancient rocks of Charnwood Forest, Leicestershire. Leicester: Leicester Literary and Philosophical Society. | |||
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: | |||
E155 E141 |