| Blisworth Clay Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Great Oolite Group |
| Underlies | Cornbrash Formation |
| Overlies | Blisworth Limestone |
| Thickness | up to 10 metres (30 ft) typically 2-4 metres |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, Limestone, Ironstone |
| Location | |
| Region | Europe |
| Country |  England |
| Extent | East Midlands |
| Type section | |
| Named for | Blisworth |
The Blisworth Clay Formation is a geological formation in England. It is part of the Great Oolite Group and was deposited in the Bathonian stage of the Middle Jurassic. The predominant lithology is mudstone with thin beds of limestone and sandstone with ironstone nodules.[1] Towards the South-West it laterally transitions into the Forest Marble Formation.
- ^ "Blisworth Clay Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 31 July 2018.