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==Oxford Limestone Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=OXL (OXL)], Carboniferous, Northern England Province ==
Oxford Limestone Member is part of the [[Alston Formation]]

=== Name ===
Known alternatively as the Greenses Limestone. See Frost and Holliday (1980<ref name="frostholliday80">Frost, D V, and Holliday, D W.1980.Geology of the country around Bellingham.''Memoir of the Geological Survey of Great Britain'', Sheet 13 (England and Wales).</ref>); Burgess and Holliday (1979<ref>Burgess, I C, and Holliday, D W.1979.Geology of the country around Brough-under-Stainmore.''Memoir of the Geological Survey of Great Britain'', Sheet 31, parts 25 and 30 (England and Wales).</ref>); Day (1970<ref name="day70">Day, J B W.1970.Geology of the country around Bewcastle.''Memoir of the Geological Survey of Great Britain'', Sheet 12 (England and Wales).</ref>); Fowler (1926<ref>Fowler, A.1926.The geology of Berwick on Tweed, Norham and Scremerston.''Memoir of the Geological Survey of Great Britai''n, Sheets 1 and 2 (England and Wales).</ref>); George and Black (1971<ref name="georgeblack71">George, T N, and Black, W W.1971.The Lower Carboniferous(Dinantian) of England, Wales and Scotland. International Strati-graphical Lexicon, Part 3a Vii. International Union of Geological Sciences.</ref>); Gunn (1900<ref>Gunn, W.1900.The geology of Belford, Holy Island, and the Farne Islands, Northumberland.''Memoir of the Geological Survey of Great Britain'', Sheet 4 (England and Wales).</ref>); Gunn and Clough (1895<ref>Gunn, W, and Clough, C T.1895.The geology of part of Northumberland, including the country between Wooler and Coldstream.''Memoir of the Geological Survey of Great Britain'', Sheet 3 (England and Wales).</ref>).

=== Lithology ===
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.

=== Stratotype ===
The type section is near Broomlee Lough, Northumberland (NY 7903 6990 and 7960 7041). Frost and Holliday (1980, p. 32<ref name="frostholliday80" />) noted this locality in the grey to dark grey fossiliferous limestone with ''Osagia'' (‘''Girvanella''’) haloes, which is 5–6 m thick in the Bellingham district (Figure 11, Column 3).

=== Lower and upper boundaries ===
The lower boundary is 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.

The upper boundary of the member is 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 ===
Between 5 and 6 m.

=== Distribution and regional correlation ===
Widespread limestone member occurring throughout the Northumberland Trough in northern England and the Scottish Borders within the Alston Formation, stratigraphically lying below the Eelwell Limestone (Figure.12, Column 1–4; Figure 13, Column 3). Some authors correlate the Oxford Limestone with the Jew Limestone of the Alston Block and north of the Lake District (George and Black, 1971<ref name="georgeblack71" />) and with the Bridge Limestone in the Bewcastle and Langholm area (Day, 1970<ref name="day70" />) (Figure 10, Column 3; Figure.11, Column.2).

=== Age ===
Brigantian.

== References ==
<references/>
[[Category:Carboniferous lithostratigraphical nomenclature]]

Oxford Limestone Member - Revision history

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Geosource>Volunteer 01: Created page with "==Oxford Limestone Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=OXL (OXL)], Carboniferous, Northern England Province == Oxford Limestone Member is part of the Alston..."