This large specimen has lost most of its shell and what is preserved is a cast of the hollow interior. The shell is still present in the centre and around the start of the outer whorl.

The ammonite was found in Horn Park Quarry near Beaminster. The quarry is the smallest NNR in Britain, being just one acre or 0.32 hectares in size. It was once a working quarry but it is no longer and the remaining outcrop is protected by a fence. There is no collecting other than for scientific and educational purposes. A section of the fossil beds has been stripped back and protected from the weather by a removable cover. To arrange a visit, contact the Senior Reserve Manager on 07899 731404.

Find out more about ammonites on the molluscs pages.

Common name


Scientific name



Molluscs > Cephalopods


Inferior Oolite

Time period

Middle Jurassic


174 million years

Where found

Horn Park quarry

Found by

Bob Chandler


Beaminster Museum

Accession number