The BGS Lexicon of Named Rock Units — Result Details
Charnwood Lodge Volcanic Formation
Computer Code: | CMCL | Preferred Map Code: | CLV |
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Status Code: | Full | ||
Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
Lithological Description: | Andesitic to dacitic volcanic block-breccias and lithic lapilli tuffs, massive to poorly stratified, divided into members in part. The unit is the lateral equivalent of the Beacon Hill Formation. | ||
Definition of Lower Boundary: | Not exposed, taken at base of the Benscliffe Breccia Member, consisting of grey, crystal-rich volcanic breccia. This member overlies grey-green fine- to medium-grained volcaniclastic rocks of the Blackbrook Reservoir Formation. | ||
Definition of Upper Boundary: | Sharp or gradational over 1m with Bradgate Formation, latter consisting of dark to medium grey laminated volcaniclastic siltstones and sandstones with disturbed bedding. | ||
Thickness: | About 1300m | ||
Geographical Limits: | North-west Charnwood Forest, from Grace Dieu to Bardon Hill. | ||
Parent Unit: | Maplewell Group (CMV) | ||
Previous Name(s): | Charnwood Lodge Member [Obsolete Name and Code: Use CMCL]
(-2709)
Charnwood Lodge Agglomerate Member (-794) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Reference Section | Grace Dieu to High Cademan and Ratchet Hill. | ||
Type Section | Charnwood Lodge Nature Reserve between Flat Hill and Warren Hill. | ||
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. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E155 E141 |