The BGS Lexicon of Named Rock Units — Result Details
Sannox Siltstone Formation
| Computer Code: | SXS | Preferred Map Code: | SXS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Early Devonian Epoch (DL) — Early Devonian Epoch (DL) | ||
| Lithological Description: | Red-brown siltstones and silty mudstones, with beds of sandstone and quartzite conglomerate. | ||
| Definition of Lower Boundary: | The top of the Glen Sannox Conglomerate Member of the Am Binnein Sandstone Formation. | ||
| Definition of Upper Boundary: | The base of the sandstone, unnamed on Arran sheet GVS, but referred to as the North Sannox Sandstones by Morton (1979)(Fig.1), and correlatable with the Teith Sandstone Formation. | ||
| Thickness: | About 350 m thick. | ||
| Geographical Limits: | The Isle of Arran. | ||
| Parent Unit: | Strathmore Group (SEG) | ||
| Previous Name(s): | Allt Na H'Ath Siltstones [Obsolete Name and Code: Use SXS]
(-1215)
Sannox Siltstones [Obsolete Name and Code: Use SXS] (*43) |
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| Alternative Name(s): | Cromlix Mudstone Formation |
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| Stratotypes: | |||
| Partial Type Section | Glen Sannox, faulted at top. | ||
| Reference(s): | |||
| Morton, D J, 1979. Palaeogeographical evolution of the Lower Old Red Sandstone Basin in the western Midland Valley. Scottish Journal of Geology, Vol.15, 97-116, Fig.1 | |||
| Friend, P F, Harland, W B and Hudson, J D, 1963. The Old Red Sandstone and the Highland Boundary in Arran, Scotland. Transactions of the Edinburgh Geological Society, Vol.19, 363-425. | |||
| Browne, M A E, Smith, R A, and Aitken, A M. 2002. Stratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. British Geological Survey Research Report RR/01/04. 67 pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S338 S013 | |||