| 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]
- ^ 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.