The BGS Lexicon of Named Rock Units — Result Details

MALVERNS COMPLEX
Computer Code: MVC  Status Code: FORMAL ENTRY 
Preferred Map Code: MvC 
Age or Age Range: [ AC ] CRYOGENIAN  to [ A3 ] NEOPROTEROZOIC III 
Lithological Description:
Mainly diorite, tonalite and hybridised and sheared derivatives of these protoliths (Lambert and Holland, 1971; Barclay, W J, Ambrose, K, Chadwick, R A and Pharoah, T C. 1997]. 
Definition of Lower Boundary:
Not seen, apart from local thrust slices in tectonic contact with Palaezoic cover rocks. 
Definition of Upper Boundary:
Unconformity or faulted contact with Palaeozoic cover rocks. 
Thickness:
Not applicable. 
Geographical Limits:
Malvern Hills, Hereford and Worcester; small outliers at Cowleigh Park and Martley. 
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):
MALVERNIAN SYSTEM   
MALVERNIAN  MALV 
MALVERN COMPLEX   
MALVERNIAN SERIES   
MALVERNIAN COMPLEX   
MALVERNIAN GROUP  EM 
Alternative Name(s):
none recorded or not applicable
Stratotypes:
Type Area  Malvern Hills ('The Malverns') numerous quarries and natural exposures from north Malvern to Chase End Hill. 
Reference(s):
Barclay, W J, Ambrose K, Chadwick, R A and Pharaoh, T C. 1997. Geology of the country around Worcester. Memoir of the British Geological Survey, Sheet 199 (England and Wales). 
Callaway, C, 1879. The Gneissic and Granitoid Rocks of Anglesey and the Malvern Hills. Proceedings of the Geological Society of London, Vol.36, p.2-3. 
Groom, T. 1910. Geology in the Field. Geologists' Association, Jubilee, Vol.2, p.700. 
Thorpe, R S, Beckinsale, R D, Patchett, P J, Piper, A, Davies, G R and Evans, J A, 1984. Crustal growth and late Precambrian-early Palaeozoic plate tectonic evolution of England and Wales. Quarterly Journal of the Geological Society, Vol.141, p.521-536. 
Lambert, R St. J and Holland, J G, 1971. The petrography and chemistry of the igneous complex of the Malvern Hills, England. Proceedings of the Geologists' Association, Vol.82, p.323-352. 
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
E  199

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