The BGS Lexicon of Named Rock Units — Result Details

BRONSIL SHALE FORMATION
Computer Code: BRSH  Status Code: FORMAL ENTRY 
Preferred Map Code: BSh 
Age or Age Range: [ O1 ] TREMADOC  to [  ]  
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: Parent Unit Code:
NO IMMEDIATE PARENT [HIERARCHY CODE: NO PARENT OF THE NEXT HIGHER RANK IS IDENTIFIED]  NOPAR
Previous Name(s): Previous Code(s):
BRONSIL SHALES  BRSH 
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 sequenceof the Cambrian and associated beds of the Malvern Hills. Quarterly Journal of the Geological Society, Vol.58, p.105. 
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:
Map Code Sheet Name
E  216

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