Chinnor Chalk Pit
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| Site of Special Scientific Interest | |
 | |
| Location | Oxfordshire |
|---|---|
| Grid reference | SU 757 997[1] |
| Interest | Geological |
| Area | 20.4 hectares (50 acres)[1] |
| Notification | 1986[1] |
| Location map | Magic Map |
Chinnor Chalk Pit is a 20.4-hectare (50-acre) geological Site of Special Scientific Interest south of Chinnor in Oxfordshire.[1][2] It is a Geological Conservation Review site.[3]
This site is described by Natural England as "important for its excellent exposures of Totternhoe Stone", dating to the mid-Cenomanian stage of the Cretaceous period, around 100 million years ago. It has yielded many fossils of ammonites from the Lower and Middle Chalk.[4]