Bivalve shell

This bivalve shell has tubeworms attached to its outer surface. Tubeworms protect themselves by living in a hard tube which they secrete around their body. They often attach themselves to hard surfaces such as other animals’ shells. 

Horn Park Quarry near Beaminster is the smallest National Nature Reserve (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 hasbeen 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 bivalves on the molluscs pages.

Common name

Bivalve shell

Scientific name



Molluscs > Bivalves


Inferior Oolite

Time period

Middle Jurassic


174 million years

Where found

Horn Park Quarry

Found by

Bob Chandler


Beaminster Museum

Accession number