The BGS Lexicon of Named Rock Units — Result Details
Middle Limestone Formation [Obsolete: use AG]
| Computer Code: | MLG | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Brigantian Substage (CX) — Brigantian Substage (CX) | ||
| Lithological Description: | [Obsolete: use AG] Limestones, sandstones, shales and coals. Fossiliferous. | ||
| Definition of Lower Boundary: | Drawn at the base of the Oxford Limestone Member where it rests conformably upon the Crosshill Limestones Member. Boundary defined on palaeontological grounds only. | ||
| Definition of Upper Boundary: | Drawn at the conformable upward passage of the Middle Limestone Group with the base of the Great Limestone. | ||
| Thickness: | Not known. | ||
| Geographical Limits: | Northumberland. | ||
| Parent Unit: | none recorded or not applicable | ||
| Previous Name(s): | Middle Limestone Group [Obsolete Name and Code: Use MLG]
(*600)
Upper Bernician [Obsolete Name and Code: Use MLG] (-397) |
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| Alternative Name(s): | Upper Liddesdale Group [Obsolete: use AG] |
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| Stratotypes: | |||
| Type Area | Berwick-On-Tweed. | ||
| Reference(s): | |||
| Smith, S, 1910. The Faunal Succession of the Upper Bernician. Transactions of the Natural History Society, Northumberland, Durham and Newcastle, Vol.3, p.595. | |||
| Fowler, A. 1926. The geology of Berwick-upon-Tweed. Norham and Scremerston. Memoir of the Geological Survey of Great Britain. (London: HMSO.) | |||
| Westoll, T S and others, 1955. A Guide to the geology of the district around Alnwick, Northumberland. Proceedings of the Yorkshire Geological Society, Vol.30, p.77. | |||
| Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E018 E004 E006 E008 E019 E025 E001 E002 | |||