The BGS Lexicon of Named Rock Units — Result Details

Rubery Shale Member

Computer Code: RBSH Preferred Map Code: RbSh
Status Code: Pending Upgrade
Age range: Telychian Age (ST) — Telychian Age (ST)
Lithological Description: Mudstone, buff, grey, blue and purple (`shales') and thin beds of fine-grained fossiliferous sandstone and thin white and purple limestone.
Definition of Lower Boundary: Base of buff, grey, and purple mudstone-dominated beds (shales), overlying predominantly sandstone beds of the underlying `Rubery Sandstone' (Wills and others, 1925).
Definition of Upper Boundary: Unconformable base of the Halesowen Formation (Carboniferous) in type area. Base of mudstone with thin limestone bands (bed M of Butler, 1957) in Walsall Borehole (base of Buildwas Formation).
Thickness: c.23m in type area; c.73m in Walsall Borehole.
Geographical Limits: Small area around Rubery, West Midlands.
Parent Unit: Rubery Formation (RBY)
Previous Name(s): Rubery Shale (-1784)
Upper Llandovery Shale (-2388)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Callow Brook (Old and others, 1991; Ziegler and others, 1968, p.784) 
Type Area  Rubery Hill Hospital and Rubery; also at Callow Brook (Wills and others, 1925) and Bristol Road Section (Wills and Laurie, 1937) 
Reference Section  Walsall Borehole [SP09NW/33], from 265.2 to 338.3m depth (Butler, 1937) 
Reference(s):
Butler, A J, 1937. On Silurian and Cambrian rocks encountered in a deep boring at Walsall, South Staffordshire, Geological Magazine, 74, 241-257. 
Wills, L J and Laurie, W H, 1938. Deep sewer trench along the Bristol Road from Ashill Road near Longbridge Hotel to the city boundary at Rubery, 1937. Proceedings of the Birmingham Natural History and Philosophical Society, 16, 175-180. 
Old R A, Hamblin, R J O, Ambrose, K, and Warrington G. 1991. Geology of the country around Redditch. Memoir of the British Geological Survey, Sheet 183 (England and Wales). 
Ziegler, A M, Cocks, L R M and McKerrow, 1968. The Llandovery transgression of the Welsh Borderland. Palaeontology, Vol.11, 736-782. 
Eastwood, T, Whitehead, T H and Robertson, T, 1925. The geology of the country around Birmingham. Memoir of the British Geological Survey of Great Britain. 
Wills, L J, Wilkins, L G and Hubbard, G H, 1925. The upper Llandovery Series at Rubery. Proceedings of the Birmingham Natural History and Philosophical Society, 15, 67-83. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E183 E168