The BGS Lexicon of Named Rock Units — Result Details

White-Leaved Oak Shale Formation

Computer Code: WOA Preferred Map Code: WOa
Status Code: Full
Age range: Merioneth Series (EM) — Merioneth Series (EM)
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: Not Applicable (-)
Previous Name(s): White-Leaved-Oak Shales [Obsolete Code: Use WOA] (WLSH)
Black Shales Of Malvern (-1926)
White-Leaved Oak Shales (-616)
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 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