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): Greenses Limestone (-1751)
Oxford Limestone (*901)
Alternative Name(s): none recorded or not applicable
Type Section  Near Broomlee Lough, Northumberland. Frost and Holliday, 1980. 
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. 
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.] 131pp. 
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.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E003 E004 E006 E008 E013 E001 E002 E009