The BGS Lexicon of Named Rock Units — Result Details
Thornhill Sandstone Formation
Computer Code: | THHS | Preferred Map Code: | THHS |
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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) |
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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 |