The BGS Lexicon of Named Rock Units — Result Details

WHITE-LEAVED OAK SHALE FORMATION
Computer Code: WOA  Status Code: FORMAL ENTRY 
Preferred Map Code: WOa 
Age or Age Range: [ EM ] LATE CAMBRIAN  to [  ]  
Lithological Description:
Dark grey mudstones. 
Definition of Lower Boundary:
Faulted junction with Hollybush Sandstone. 
Definition of Upper Boundary:
Nowhere exposed; probably conformable junction with Bronsil Shale. 
Thickness:
150-250m 
Geographical Limits:
Southwest of Raggedstone Hill; west side of Midsummer Hill, both at south end of Malvern Hills; small proving in well at West Malvern. 
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):
BLACK SHALES OF MALVERN   
WHITE-LEAVED OAK SHALES  WLSH 
Alternative Name(s):
none recorded or not applicable
Stratotypes:
Type Area  White-leaved Oak village, Hereford-Worcester. 
Reference(s):
Groom, T T, 1902. The Sequence of the Cambrian and Associated Beds of the Malvern Hills. Quarterly Journal of the Geological Survey, Vol.58, p.99. 
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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