The BGS Lexicon of Named Rock Units — Result Details

Malverns Complex

Computer Code: MVC Preferred Map Code: MvC
Status Code: Full
Age range: Cryogenian Period (AC) — Ediacaran Period (AD)
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: Not Applicable (-)
Previous Name(s): Malvernian Series (-1716)
Malvernian [Obsolete Name And Code: Use MVC] (MALV)
Malvern Complex (-1074)
Malvernian Complex (-1075)
Malvernian Group [Obsolete Name And Code: Use MVC] (EM)
Gneisses [Obsolete Name And Code: Unnamed Part Of MVC] (EMG)
Quartzite [Obsolete Name And Code: Unnamed Part Of MVC] (EMQ)
Schists [Obsolete Name And Code: Unnamed Part Of MVC] (EMS)
Malvernian System (-3569)
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):
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. 
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. 
Groom, T. 1910. Geology in the Field. Geologists' Association, Jubilee, Vol.2, p.700. 
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). 
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. 
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 E199