The BGS Lexicon of Named Rock Units — Result Details

Oldbury Farm Sandstone Formation

Computer Code: OFS Preferred Map Code: OFS
Status Code: Full
Age range: Late Devonian Epoch (DU) — Tournaisian Age (CT)
Lithological Description: Greyish green conglomerates, sandstones, siltstones and reddish brown and green silty and sandy mudstones. Typically in upward-fining cycles.
Definition of Lower Boundary: Conglomerate with subordinate sandstone layers rests with sharp base on reddish purple shaly mudstone of the Merevale Shale Formation.
Definition of Upper Boundary: Greyish green massive siltstone with mudstone fragments and large roots in the top 15cm (Oldbury Sandstone Formation) is sharply overlain by pale grey sandstone with carbonised woody fragments (Millstone Grit).
Thickness: 152m true thickness in Merevale No.2 Borehole.
Geographical Limits: From just south of Outwoods (SP 2975 9614) southeastward to just southeast of Moor Wood Farm (SP 3133 9417).
Parent Unit: Portishead Subgroup (POB)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Borehole No. SP39NW/6 (Merevale No.2) 176' 8" - 701' 0" (Taylor and Rushton, 1971). 
Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. 
Taylor, K and Rushton, A W A, 1971. The pre-Westphalian geology of the Warwickshire Coalfield. Bulletin of the Geological Survey of Great Britain, No.35. 
Bridge, D McC, Carney, J N, Lawley, R S and Rushton, A W A. 1998. Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: