| Roxby Formation | |
|---|---|
| Stratigraphic range: Guadalupian-Early Triassic Preκ κ O S D C P T J K Pg N | |
| 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). The formation is made up largely of mudstone and siltstone, reddish brown, with subordinate sandstone.
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.
 | This article about a specific stratigraphic formation in the United Kingdom is a stub. You can help Misplaced Pages by expanding it. |