The BGS Lexicon of Named Rock Units — Result Details
Benton Volcanic Group
| Computer Code: | PBV | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ) | ||
| Lithological Description: | Spherulitic and autobrecciated lavas of sodic rhyolite and trachyte with subordinate red and green sillicic tuffs. | ||
| Definition of Lower Boundary: | Unknown, possibly faulted. | ||
| Definition of Upper Boundary: | Unknown, possibly faulted. | ||
| Thickness: | Unknown. | ||
| Geographical Limits: | South west Wales, Pembrokeshire, Haverfordwest district. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Benton Series [Obsolete Name and Code: Use PBV]
(-2968)
Benton Volcanic Series [Obsolete Name and Code: Use PBV] (-1755) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Outcrops immediately to west of Benton Castle, Lawrenny, Pembrokeshire. Strahan et al., 1914. | ||
| Reference Section | Outcrops around Great Westfield, 1.3km east of Rosemarket, Pembrokeshire. Baker, 1982. | ||
| Reference(s): | |||
| Bevins, R E, Pharaoh, T C, Cope, J C W, and Brewer, T S. 1985. Geochemical character of Neoproterozoic volcanic rocks in southwest Wales. Geological Magazine, Vol. 132, 339-349. | |||
| Baker, J W. 1971. The Precambrian rocks of Pembrokeshire. 170-179 in Geological Excursions in South Wales and the Forest of Dean. Bassett M G (editor). (Cardiff: Geologists' Association, South Wales Group.) | |||
| Baker, J W. 1982. The Precambrian of south-west Dyfed. 15-25 in Geological Exclusions in Dyfed, South-west Wales. Bassett, M G (editor). (Cardiff: National Museum of Wales.) | |||
| Strahan A, Cantrill T C, Dixon E E L, Thomas H H, and Jones O T. 1914. The geology of the South Wales Coalfield, Part XI. The country around Haverfordwest. Memoir of the Geological Survey of Great Britain. (London: HMSO). 262pp. | |||
| Shackleton, R M. 1975. Precambrian rocks of Wales. 76-83 in A correlation of Precambrian rocks in the British Isles. Harris, A L, and others (editors). Geological Society of London Special Report No. 6. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||