The BGS Lexicon of Named Rock Units — Result Details

Cademan Volcanic Breccia Member

Stratotypes:
Computer Code:	CVB	Preferred Map Code:	CVB
Status Code:	Full
Age range:	Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description:	Massive volcanic block-breccia comprising angular to sub-rounded andesitic to dacitic blocks in a crystal-lapilli matrix.
Definition of Lower Boundary:	Not seen, but mapping shows unit to be spatially associated with the Grimley Andesite, with which it may in part be gradational.
Definition of Upper Boundary:	Not seen, but mapping shows unit to be spatially associated with the Grimley Andesite, with which it may in part be gradational.
Thickness:	0-450m
Geographical Limits:	North-western Charnwood Forest, between High Cademan and Grace Dieu Wood.
Parent Unit:	Charnwood Lodge Volcanic Formation (CMCL)
Previous Name(s):	Whitwick Volcanic Complex (WVO) Whitwick Volcanic Complex (WVO)
Alternative Name(s):	Whitwick Volcanic Complex
Type Area	Grace Dieu Wood to High Cademan.
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.
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:
E141