Ammonite

Ammonite body chamber

Many ammonites are only well-preserved as ‘body chambers’. This is the long, last chamber of the shell that housed the soft parts, with the head extending from the end. When these soft parts rotted away, mud was washed inside, preserving that part of the shell. However, the rest of the shell, which consisted of a series of hollow chambers, was not filled with mud and as a result was crushed flat. The body chamber typically takes up the last half whorl of the shell.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Pavlovia

Type

Molluscs > Cephalopods


Strata

Kimmeridge Clay

Time period

Upper Jurassic

Age

150 million years

Where found

Chapman's Pool



Found by

Mrs Calkin

Museum

Swanage Museum

Accession number

SWNTB.1992.01