The BGS Lexicon of Named Rock Units — Result Details
Witney Coal Member
| Computer Code: | WTC | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Asturian Substage (CAS) — Asturian Substage (CAS) | ||
| Lithological Description: | A grey coal-bearing succession, with typical upward-coarsening cycles from mudstone to sandstone, capped by a seatearth and a coal. | ||
| Definition of Lower Boundary: | Seen in the type section as a grey mudstone with basal coal of the Witney Coal Member overlies conformably pale greenish grey, rooted, fine-grained sandstone of the Pennant Sandstone Formation. | ||
| Definition of Upper Boundary: | Seen in the type section as a greyish blue, brown, yellow and red mudstone of the Crawley Member, overlies conformably dark grey, carbonaceous mudstone of the Witney Coal Member. | ||
| Thickness: | Maximum thickness of 83 m in the type section. | ||
| Geographical Limits: | Widespread in the Oxfordshire Coalfield, but proved only in the subsurface, and in a single borehole, Harwell No. 3 SU48NE92, (SU 46801 86441), in the Berkshire Coalfield (Foster et al., 1989). | ||
| Parent Unit: | Grovesend Formation (GDB) | ||
| Previous Name(s): | Witney Coal Formation [Obsolete Name and Code: Use WTC]
(-3144)
Witney Coal Group [Obsolete Name and Code: Use WTC] (-2541) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Steeple Aston Borehole SP42NE12, complete thickness of the member from 467.4 m to 424.66 m depth. .Poole, 1977. | ||
| Type Section | Apley Barn Borehole SP31SW3, complete thickness of the member from 875.4 m to 792.4 m depth. Poole, 1969. | ||
| Reference Section | Upton Borehole, SP21SW1, from 1049.88 to 928.29 m. Worssam, 1963; Poole, 1977. | ||
| Reference(s): | |||
| Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. | |||
| Waters, C N, Barclay, W J, Davies, J R and Waters, R A. In press. Stratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/05/06. | |||
| Poole, E G. 1977. Stratigraphy of the Steeple Aston Borehole, Oxfordshire. Bulletin of the Geological Survey of Great Britain, Vol. 57, 1-85. | |||
| Foster D, Holliday D W, Jones C M, Owens B and Walsh A. 1989. The concealed Upper Palaezoic rocks of Berkshire and South Oxfordshire. Proceedings of the Geologists' Association, Vol. 100, 395-407. | |||
| Poole, E G. 1969. The stratigraphy of the Geological Survey Apley Barn Borehole, Witney, Oxfordshire. Bulletin of the Geological Survey of Great Britain, Vol. 29, 1-66. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E236 | |||