The BGS Lexicon of Named Rock Units — Result Details
Keele Formation [Obsolete: use ALY, HA, MRD, SAL]
| Computer Code: | KE | Preferred Map Code: | Ke |
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| Status Code: | Full | ||
| Age range: | Westphalian Stage (CW) — Stephanian Stage (CS) | ||
| Lithological Description: | [Obsolete: use ALY, HA, MRD, SAL] (Potteries Coalfield only). Sandstone and mudstone, predominantly red, brown and purple; minor grey strata; some thin limestones. Mudstones more variegated, and sandstones more lithic and micaceous, than in the overlyinging Radwood Formation. NOTE: Originally called Keele Sandstone Series - see Gibson, 1899, p.122-129. Boundaries are redefined here because the base in the type area is diachronous; the Sidway Mill Borehole(SJ 73 NE/3) provides a reference section). | ||
| Definition of Lower Boundary: | (Potteries Coalfield only). Taken at lowest red or purple beds overlying grey Newcastle Formation. This boundary varies relative to named sandstones, and is noticeably diachronous. | ||
| Definition of Upper Boundary: | (Potteries Coalfield only). Gradation up into Radwood Formation. | ||
| Thickness: | 200-350m. | ||
| Geographical Limits: | Potteries Coalfield, as defined here; elsewhere the name included a variety of red-beds now referred to the Halesowen Formation and Salop Formation (Alveley Member) (Powell et al., 1999; Besly and Cleal, 1997). | ||
| Parent Unit: | none recorded or not applicable | ||
| Previous Name(s): | Keele Formation [Obsolete Name and Code: Use KE]
(-3494)
Keele Beds [Obsolete Name and Code: Use RWD, ALY, KE] (-1947) Keele Formation [Obsolete Name And Code: See KE] (KEG) Keele Sandstone Series [Obsolete Name and Code: Use KE] (-1620) Keele Group [Obsolete Name and Code: Use KE] (-341) |
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| Alternative Name(s): | Alveley Member Halesowen Formation |
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| Stratotypes: | |||
| Type Area | Potteries Coalfield - boreholes and some surface sections. Traditional type area, around Keele (Gibson, 1899, p.126). | ||
| Reference Section | Whole of unit: Sidway Mill Borehole, SJ73NE/3, from 1452ft 3in to 2141ft 8in depth. | ||
| Reference Section | Base of unit, 41ft below Springpool Sandstone. Barker's Wood Borehole, SJ84NW/68, at 93ft 6in depth. | ||
| Reference Section | Base of unit below Hanchurch Sandstone. Rectory No.2 Borehole, SJ84NW/90, at 245ft 8in depth. | ||
| Reference(s): | |||
| Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 2000. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. | |||
| Gibson, W, 1899. Summary of Progress of the Geological Survey of Great Britain for 1898, p.122-129. | |||
| Besly, B M, and Cleal, C J. 1997. Upper Carboniferous stratigraphy of the West Midlands (UK) revised in the light of borehole geophysical logs and detrital compositional suites. Geological Journal 32, 85-118. | |||
| Rees, J G and Wilson, A A. 1998. Geology of the country around Stoke-on-Trent. Memoir of the British Geological Survey, Sheet 123 (England and Wales). | |||
| Whittard, W F and Simpson, S, 1960. Upper Carboniferous of England, Wales and Scotland, "in" Whittard, W F and Simpson, S. Lexique Stratigraphique International, part 3a VIII, Vol.18. Centre National de la Recherche Scientifique, Paris. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E123 E183 E167 E168 E169 E201 | |||