Ammonite

Football-shaped form

This is an unusual ammonite from the ‘middle’ part of the Jurassic period, a time when many ammonites developed into different forms. In this case, the outer whorls enveloped the inner ones to create a football-like shape. The suture lines (wavy patterns) are just visible, made where the internal chamber walls met the shell. 

The fossil was found in the Cordatum Zone, Jordan Hill Clay, about three metres below the Red Nodule Bed.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Type

Molluscs > Cephalopods


Strata

Oxford Clay

Time period

Upper Jurassic

Age

160 million years

Where found

Furzy Cliff

Found by

Adrian Brokenshire in 1986

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.13890