Ammonite

Mystery markings

Here are two unusual examples of the ammonite Lytoceras from the Belemnite Stone Band. Notice they have the occasional large flanges (ridges) on the shell – no-one is quite sure what purpose they serve or why they should be so prominent on this genus of ammonite. But this is one of the great things about geology and fossils: there are still lots of unresolved mysteries and new discoveries to be made.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Lytoceras

Type

Molluscs > Cephalopods


Strata

Belemnite Marls

Time period

Lower Jurassic

Age

190 million years

Where found

Seatown

Found by

Chris Moore

Museum

Bridport Museum

Accession number

BRPMG 10822