The BGS Lexicon of Named Rock Units — Result Details
Batch Volcanic Member
| Computer Code: | BV | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
| Lithological Description: | Purplish red mudstones and thin sandstones, interbedded with four beds of distinctive purple and pale greenish grey, coarse crystal lithic ash, and lithic lapilli tuff. | ||
| Definition of Lower Boundary: | Lies within the purple sandstones and mudstones of the Synalds Formation. Base is taken at the sharp base of the "Andesitic Ash", a distinctive purple and green coarse-grained tuff bed about 130m below the top of the Synalds Formation. | ||
| Definition of Upper Boundary: | Taken at the top of a 2m-thick unnamed purple and pale grey tuff bed, about 21m below the top of Synalds Formation. Overlain by purple mudstones and siltstones of the Synalds Formation (undivided). | ||
| Thickness: | 110 m. | ||
| Geographical Limits: | Lies within eastern part of the Long Mynd, Shropshire. | ||
| Parent Unit: | Synalds Formation (SYGP) | ||
| Previous Name(s): | Batch Volcanic Rocks [Obsolete Name and Code: Use BV]
(-2649)
Batch Volcanic Beds [Obsolete Name and Code: Use BV] (-3258) Batch Volcanics [Obsolete Code: Use BV] (YSSB) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Spur rising westwards from the junction of the Jonathan's Hollow and Long Batch valleys 1.5km westnorthwest of All Stretton, Shropshire. Greig et al., 1968. | ||
| Type Area | Long Mynd area, near Church Stretton between Ashes Hollow and Womerton Farm. Greig et al., 1968. | ||
| Reference(s): | |||
| Wilson, D, 2000. Shropshire. 81-113 in Precambrian rocks of England and Wales. Carney, J N (editor). Geological Conservation Review Series No. 20. (Peterborough: Joint Nature Conservation Committee). | |||
| Cobbold, E S. 1901. The geology of the Church Stretton district. 1-115 in Church Stretton vol 1. Campbell-Hyslop, C W (Editor). No. 1. (Shrewsbury: L Wilding). | |||
| Blake, J F. 1890. On the Monian and basal Cambrian rocks of Shropshire. Quarterly Journal of the Geological Society, London, Vol. 46, 386-420. | |||
| Greig D C, Wright, J E, Hains, B A and Mitchell, G H. 1968. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoir of the Geological Survey, Sheet 166 (England and Wales). (London: H.M.S.O.). 379pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||