Ampthill Clay
| Ampthill Clay | |
|---|---|
| Stratigraphic range: Oxfordian | |
| Type | Geological formation | 
| Unit of | Ancholme Group | 
| Underlies | Kimmeridge Clay | 
| Overlies | West Walton Formation or Corallian Group | 
| Thickness | 0-90 m | 
| Lithology | |
| Primary | Mudstone | 
| Other | Limestone, Marl | 
| Location | |
| Region | England | 
| Country | United Kingdom | 
The Ampthill Clay is a Mesozoic geological formation in southern England. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.