The BGS Lexicon of Named Rock Units — Result Details
Thirlstane Beds
| Computer Code: | THSD | Preferred Map Code: | THSD |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Holkerian Substage (CQ) — Holkerian Substage (CQ) | ||
| Lithological Description: | Fine-grained, well sorted, pale grey quartz sandstone characterised by large-scale cross-bedding and soft sediment liquefaction structures. | ||
| Definition of Lower Boundary: | Sharp base on marine mudstones of the Powillimount Sandstone Formation. | ||
| Definition of Upper Boundary: | The Thirlstane Sandstone Member lies conformably under the Arbigland Limestone Formation. | ||
| Thickness: | 25m | ||
| Geographical Limits: | Powillimount shore, Southerness, Kirkcudbrightshire, south-western Scotland (Southern Uplands). | ||
| Parent Unit: | Powillimount Sandstone Member (POSD) | ||
| Previous Name(s): | Thirlstane Sandstone Formation [Obsolete Name and Code: Use THSD]
(-1862)
Thirlstane Sandstone [Obsolete: Use THSD] (THI) Thirlstane Sandstone Member [Obsolete Name and Code: Use THSD] (-4925) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Coastal section 500m ENE of Powillimount Farm, Southerness, Kirkcudbrightshire. | ||
| Reference(s): | |||
| Craig, G Y. 1956. The Lower Carboniferous outlier of Kirkbean, Kirkcudbrightshire. Transactions of the Geological Society of Glasgow, Vol. 22, 113-132. | |||
| Deegan, C E. 1970. The petrology and sedimentology of the Lower Carboniferous rocks between White Port and Kirkbean, Kirkcudbrightshire. University of Wales, Aberystwyth Ph D Thesis (unpublished). | |||
| Ord, D M, Clemmy, H and Leeder, M R, 1988. Interaction between faulting and sedimentation during Dinantian extension of the Solway basin. Journal of the Geological Society of London, 145, 249-259. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S006 S005 S006 | |||