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 System [Obsolete Name and Code: Use MVC]
(-3569)
Malvernian [Obsolete Name And Code: Use MVC] (MALV) 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) Malvern Complex [Obsolete Name and Code: Use MVC] (-1074) Malvernian Complex [Obsolete Name and Code: Use MVC] (-1075) Malvernian Series [Obsolete Name and Code: Use MVC] (-1716) |
||
| 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): | |||
| 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). | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E216 E199 | |||