Ammonite

This specimen has been sectioned to show the internal chambers, many of which are filled or partially-filled with calcite crystals. The chambers were filled with a mixture of gas and water when the ammonite was alive, which allowed the creature to adjust its depth in the water.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Xipheroceras

Type

Molluscs > Cephalopods


Strata

Black Ven Marls

Time period

Lower Jurassic

Age

190 million years

Where found

Black Ven, Lyme Regis

Found by

Unknown

Museum

Lyme Regis Museum

Accession number

L.1973.60