The BGS Lexicon of Named Rock Units — Result Details
Superstes Mudstone Formation
| Computer Code: | SMU | Preferred Map Code: | SMU |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Mudstone. | ||
| Definition of Lower Boundary: | Interfingers with Benan Conglomerate. Also rests conformably on Stinchar Limestone. | ||
| Definition of Upper Boundary: | Overlain/interfingers with Benan Conglomerate. | ||
| Thickness: | 0 to 25 m | ||
| Geographical Limits: | Girvan area, southwest Scotland. | ||
| Parent Unit: | Barr Group (BARR) | ||
| Previous Name(s): | Didymograptus Shales [Obsolete Name and Code: Use SMU]
(-1832)
Didymograptus Superstes Mudstones [Obsolete Name and Code: Use SMU] (-4889) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Benan Burn. | ||
| Reference(s): | |||
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. | |||
| Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. | |||
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) | |||
| Ince, D, 1984. Sedimentation and tectonism in the Middle Ordovician of the Girvan district, north west Scotland. Transactions of the Royal Society of Edinburgh. Earth Sciences, Vol.75 (2), p.225-237. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S008 | |||