The BGS Lexicon of Named Rock Units — Result Details
Thornhill Sandstone Formation
| Computer Code: | THHS | Preferred Map Code: | THHS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Cisuralian Epoch (PLC) — Cisuralian Epoch (PLC) | ||
| Lithological Description: | Fine- to coarse-grained, well sorted, red quartz sandstpone with large scale aeolian cross bedding. | ||
| Definition of Lower Boundary: | Rests unconformably on Carboniferous strata or on basal Permian breccias. | ||
| Definition of Upper Boundary: | The Thornhill Sandstone Formation is stratigraphically the highest unit in the district. | ||
| Thickness: | 200m+ on geophysical evidence | ||
| Geographical Limits: | Thornhill Basin and Locherben, Dumfriesshire, south-western Scotland (Southern Uplands). | ||
| Parent Unit: | Appleby Group (APY) | ||
| Previous Name(s): | Thornhill Sandstones [Obsolete Name and Code: Use THHS]
(-3722)
Un-named Permian sandstone of desert dune origin [Obsolete Name and Code: Use CCK, THHS] (-4529) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Crichope Linn, 3km E of the town of Thornhill, Dumfriesshire. | ||
| Reference(s): | |||
| Brookfield, M E. 1978. Revision of the Stratigraphy of Permian and Supposed Permian Rocks of Southern Scotland. Geologische Rundschau, Vol. 67, 110-143. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S009 S015 | |||