The BGS Lexicon of Named Rock Units — Result Details

Keele Formation [Obsolete Name And Code: Use ALY]

Computer Code: KE Preferred Map Code: Ke
Status Code: Index Level
Age range: Westphalian Stage (CW) — Stephanian Stage (CS)
Lithological Description: (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: Warwickshire Group (WAWK)
Previous Name(s): Keele Sandstone Series (-1620)
Keele Beds (-1947)
Keele Group (-341)
Keele Formation (Obsolete Code: Use KE) (-3494)
Keele Formation [Obsolete Name And Code: See KE] (KEG)
Alternative Name(s): Halesowen Formation
Alveley Member
Stratotypes:
Reference Section  Whole of unit: Sidway Mill Borehole, SJ73NE/3, from 1452ft 3in to 2141ft 8in depth. 
Type Area  Potteries Coalfield - boreholes and some surface sections. Traditional type area, around Keele, Gibson, 1899, p.126. 
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):
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. 
Gibson, W, 1899. Summary of Progress of the Geological Survey of Great Britain for 1898, p.122-129. 
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). 
Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 1999. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E123 E183 E167 E168 E169 E201