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Chinnor Chalk Pit

UK Site of Special Scientific Interest

About

Chinnor Chalk Pit is a 20.4-hectare (50-acre) formal chalk pit quarry that is a geological Site of Special Scientific Interest south of Chinnor in Oxfordshire, England. It is a Geological Conservation Review site.

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.

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