The BGS Lexicon of Named Rock Units — Result Details
Benton Volcanic Group
Computer Code: | PBV | Preferred Map Code: | notEntered |
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Status Code: | Pending Upgrade | ||
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 Volcanic Series [Obsolete Name and Code: Use PBV]
(-1755)
Benton Series [Obsolete Name and Code: Use PBV] (-2968) |
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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): | |||
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. | |||
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. | |||
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 (editors). (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). | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |