Ammonite Fossils found from Yorkshire, England.

Ammonites are one of the most commonly found and well recognised fossils. They are extinct marine creatures. They had a big head, large eyes and tentacles but only the shells of ammonites have ever been found as fossils.

In the Whitby area the local people used to think the ammonites were coiled snakes that had been turned to stone by the Christian saint, Hilda of Whitby. They were known as snakestones.