Ammonite

Although this ammonite is not from the local area, it illustrates quite well how useful zonal fossils are. This specimen is from the Yorkshire coast but the same species can be found in Dorset. The narrow time range of this species tells us that the rocks from both locations are of the same age.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Dactylioceras tenuicostatum

Type

Molluscs > Cephalopods


Strata

Upper Lias

Time period

Lower Jurassic

Age

185 million years

Where found

Yorkshire coast

Found by

Unknown

Museum

Lyme Regis Museum

Accession number

L.1997.36.84