Roxby Formation
Roxby Formation | |
---|---|
Stratigraphic range: | |
Type | Group |
Underlies | Sherwood Sandstone Group |
Overlies | Appleby Group |
Thickness | up to 1,025 metres (3,360 ft) |
Lithology | |
Primary | Mudstone and siltstone, reddish brown, with subordinate sandstone. |
Location | |
Region | England |
Country | UK |
Extent | east England |
Type section | |
Named for | Roxby, North Yorkshire |
The Roxby Formation, previously known as the Permian Upper Marls, is a formation from the Guadalupian-Early Triassic of eastern England (formation dies out at Nottinghamshire).[1] The formation is made up largely of mudstone and siltstone, reddish brown, with subordinate sandstone.[2]
References
- ^ British Geological Survey. "Roxby Formation". BGS Lexicon of Named Rock Units. Retrieved 2 July 2020.
- ^ BSmith, D B, Harwood, G M, Pattison, J and Pettigrew, T H. 1986: A revised nomenclature for Upper Permian strata in eastern England. 9-17 in Harwood, G M and Smith, D B (editors): The English Zechstein and Related Topics. Geological Society Special Publication No.22.