The BGS Lexicon of Named Rock Units — Result Details

HOLLYBUSH SANDSTONE FORMATION
Computer Code: HOS  Status Code: FORMAL ENTRY 
Preferred Map Code: HoS 
Age or Age Range: [ EC ] EARLY CAMBRIAN  to [  ]  
Lithological Description:
Dark green, flaggy, micaceous sandstone with abundant chlorite and glauconite (Groom, 1902; Worssam and others, 1989). 
Definition of Lower Boundary:
Conformable on Malvern Quartzite. 
Definition of Upper Boundary:
Conformable junction with White-Leaved Oak Shale. 
Thickness:
c.300m 
Geographical Limits:
South 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):
none recorded or not applicable none recorded or not applicable
Alternative Name(s):
none recorded or not applicable
Stratotypes:
Type Area  Hollybush Quarry. 
Reference(s):
Groom, T T, 1899. The geological structure of the southern Malvern Hills and of the adjacent areas to the west. Quarterly Journal of the Geological Society of London, Vol.55, p.129-169. 
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:
Map Code Sheet Name
E  216

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