The BGS Lexicon of Named Rock Units — Result Details
Warren House Formation
| Computer Code: | WHO | Preferred Map Code: | WHo |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
| Lithological Description: | Spilitic basalt lavas, altered intermediate lavas ('keratophyres'), altered rhyolitic lavas, felsic pyroclastic rocks, including ignimbrite. | ||
| Definition of Lower Boundary: | Tectonic (thrust) contact with Proterozoic Malverns Complex. | ||
| Definition of Upper Boundary: | Tectonic (East Malvern Fault) with Mercia Mudstone Group. | ||
| Thickness: | Not known. | ||
| Geographical Limits: | Tinker's Hill (SO 767 401) to Hangman's Hill (SO 765 390), Malvern Hills, Hereford and Worcester. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Warren House "Series" [Obsolete Name And Code: Use WHO]
(WHSS)
Warren House Group [Obsolete Name And Code: Use WHO] (EW) Rhyolites [Obsolete Name And Code: Included as part of WHO] (EWR) Spilites [Obsolete Name And Code: included as part of WHO] (EWS) Warren House Volcanic Series [Obsolete Name and Code: Use WHO] (-2532) Warren House Rocks [Obsolete Name and Code: Use WHO] (-3761) Warren House Volcanics [Obsolete Name and Code: Use WHO] (-4400) Tuffs [Obsolete Name And Code: Included As Part Of WHO] (EWT) Warren House Series [Obsolete Name and Code: Use WHO] (-1917) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Outcrop with some scattered exposures extending from Tinker's Hill in the north to Hangman's Hill in the south, and including Broad Down. | ||
| Reference(s): | |||
| Tucker, R D and Pharaoh, T C, 1991. U-Pb zircon ages for late Pre-Cambrian igneous rocks in southern Britain. Quarterly Journal of the Geological Society, Vol.148, p.435-443. | |||
| Green, A H, 1895. Notes on some recent sections in the Malvern Hills. Quarterly Journal of the Geological Society, Vol.51, p.1-8. | |||
| Bullard, D. 1989. Malvern Hills. A student's guide to the geology of the Malverns. Nature Conservancy Council. | |||
| Penn, J S W and French, J, 1971. No.4: The Malvern Hills. Geologists' Association Guide. | |||
| Pharaoh, T C, Webb, P C, Thorpe, R S and Beckinsdale, R D, 1987. Geochemical evidence for the tectonic setting of late Proterozoic volcanic suites in central England, p.541-552. "In" Geochemistry and mineralisation of Proterozoic volcanic suites. Pharaoh, T C, Beckinsale, R D, and Rickard, D, (Editors). Special Publication of the Geological Society, No.33. | |||
| Platt, J I, 1933. The petrology of the Warren House Series. Geological Magazine, Vol.70, p.423-429. | |||
| Groom, T T, 1900. On the geological structure of portions of the Malvern and Abberley Hills. Quarterly Journal of the Geological Society of London, Vol.56, 129-169. | |||
| 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 | |||