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 Formation [Obsolete Name And Code: See KE] (KEG)
Keele Beds (-1947)
Keele Formation (Obsolete Code: Use KE) (-3494)
Keele Group (-341)
Alternative Name(s): Halesowen Formation
Alveley Member
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. 1999. 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. 
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). 
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. 
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