The BGS Lexicon of Named Rock Units — Result Details
Oxford Limestone Member
| Computer Code: | OXL | Preferred Map Code: | OxL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Brigantian Substage (CX) — Brigantian Substage (CX) | ||
| Lithological Description: | Limestone, thick bedded at base, becoming thin bedded at top; grey to dark grey with numerous red-weathered Osagia (an alga) haloes; particularly rich in corals and brachiopods. | ||
| Definition of Lower Boundary: | Taken at the generally conformable, sharp base of the first bed of limestone that overlies measures of the Alston Formation. This typically displays a coal or seatearth immediately below the limestone. | ||
| Definition of Upper Boundary: | Taken at the top of the uppermost limestone bed that is overlain by a coarsening upwards sequence of dark grey mudstones, siltstone and sandstone, the first containing ironstone nodules. | ||
| Thickness: | 5 to 6m | ||
| Geographical Limits: | Widespread limestone member occurring throughout the Northumberland Trough in northern England and the Scottish Borders within the Alston Formation, lying stratigraphically below the Eelwell Limestone. | ||
| Parent Unit: | Alston Formation (AG) | ||
| Previous Name(s): | Oxford Limestone [Obsolete Name and Code: Use OXL]
(*901)
Greenses Limestone [Obsolete Name and Code: Use OXL] (-1751) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Near Broomlee Lough, Northumberland. Frost and Holliday, 1980. | ||
| Reference(s): | |||
| Burgess, I C, and Holliday, D W. 1979. Geology of the country around Brough-under-Stainmore. Memoir for 1:50 000 geological sheet 31 and parts of sheets 25 and 30. Geological Survey of Great Britain (England and Wales). (London: HMSO.) 131 pp. | |||
| George, T N and Black, W W. 1971. Lower Carboniferous (Dinantian) of England, Wales and Scotland. International Stratigraphical Lexicon, Part 3a Vii. International Union of Geological Sciences. | |||
| Fowler, A. 1926. The geology of Berwick-upon-Tweed. Norham and Scremerston. Memoir of the Geological Survey of Great Britain. (London: HMSO.) | |||
| Frost, D V and Holliday, D W. 1980. Geology of the country around Bellingham. Memoir of the British Geological Survey, Sheet 13 (England & Wales). | |||
| Day, J B W and others, 1970. Geology of the neighbourhood around Bewcastle. Memoir of the British Geological Survey, Sheet 12. (England and Wales). | |||
| Gunn, W. 1900. The geology of the Belford, Holy Island and the Farne Islands, Northumberland. Memoir of the Geological Survey of Great Britain, Sheet 4 (England and Wales). | |||
| Gunn, W and Clough, C T. 1895. The geology of the country between Wooler and Coldstream. Memoir of the Geological Survey. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E003 E004 E006 E008 E013 E001 E002 E009 | |||