The BGS Lexicon of Named Rock Units — Result Details

Bronsil Shale Formation

Computer Code: BRSH Preferred Map Code: BSh
Status Code: Full
Age range: Tremadoc Series (O1) — Tremadoc Series (O1)
Lithological Description: Fissile silver-grey mudstone.
Definition of Lower Boundary: Probably conformable with White-leaved Oak Shale.
Definition of Upper Boundary: Faulted or unconformity.
Thickness: Probably 250m - 350m.
Geographical Limits: Around Bronsil (SO 750 374), south end of Malvern Hills.
Parent Unit: Not Applicable (-)
Previous Name(s): Bronsil Shales (-88)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Around Bronsil, south end of Malvern Hills. 
Reference(s):
Groom, T T, 1902. The sequence of the Cambrian and associated beds of the Malvern Hills. Quarterly Journal of the Geological Society of London, Vol.58, p.59-135. 
Worssam, B C, Ellison, R A and Moorlock, B S P. 1989. Geology of the country around Tewkesbury. Memoir of the British Geological Survey, Sheet 216 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E216