The BGS Lexicon of Named Rock Units — Result Details
Selcoth Formation
| Computer Code: | SEO | Preferred Map Code: | SEO |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Llandovery Epoch (SL) — Llandovery Epoch (SL) | ||
| Lithological Description: | Sandstone, typically fine- to medium-grained but ranging from very fine- to coarse-grained. Generally medium- to thick-bedded over thicknesses of tens of metres interspersed with units up to few metres very thin to thin-bedded. Interbedded siltstone or silty mudstone generally in thin beds; sandstone and siltstone typically greenish grey when fresh, pale brown weathering. The Selcoth Formation is of broadly similar character to the Glendearg Formation, although it lacks the very thick-bedded parallel laminated sandstone units typical of the latter and has a very restricted age range in comparison. | ||
| Definition of Lower Boundary: | Conformable sedimentary boundary with rocks of the Moffat Shale Group. | ||
| Definition of Upper Boundary: | Faulted, no stratigraphical contact preserved. | ||
| Thickness: | Few hundred metres to 2000m | ||
| Geographical Limits: | Southern Scotland. | ||
| Parent Unit: | Ettrick Group (ETRK) | ||
| Previous Name(s): | Queensbury Formation [Obsolete Name and Code: Use ETRK, KKHP, SEO]
(-4033)
Queensbury Grits [Obsolete Name and Code: Use ETRK, KKHP, QBY, SEO] (-4034) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Silcoth Burn, Moffatdale, northeast of Moffat. Webb et al, 1993. | ||
| Reference Section | Bodesbeck Burn, Moffatdale, northeast of Moffat. Webb et al, 1993 | ||
| Reference(s): | |||
| Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. | |||
| British Geological Survey. 1991. Moffatdale. Solid Geology. 1:25 000. Classical areas of British geology. (Keyworth, Nottingham: British Geological Survey.) | |||
| Webb, B C, Rushton, A W A and White, D E. 1993. Moffatdale and the upper Ettrick valley. Description of the solid geology of parts of 1:25000 sheets NT10, 11, 20 and 21. Classical Areas of British Geology. (London: British Geological Survey, HMSO.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||