British Dactylioceras Ammonite

Description: This classic UK species positive and negative specimen is very well preserved in a concretion. They have been known in the past as “snakestones”, a legend associated with St Hilda, near Whitby in Yorkshire. Since they looked so much like a snake’s body, the locals would carve a snake’s head to complete the resemblance. Good specimens are found in England and Germany, and are known as “index fossils” because they are used to accurately correlate stratigraphy in widely-separated locations.