The sponge bed

This is a very distinctive flat sponge found in just one layer of the Inferior Oolite rocks in Horn Park Quarry, called the Sponge Bed.

Horn Park Quarry 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 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 on the sponges page.

Common name


Scientific name

Craterospongia concentricia




Inferior Oolite

Time period

Middle Jurassic


174 million years

Where found

Horn Park Quarry

Found by

Bob Chandler


Beaminster Museum

Accession number

BM 2011-43-44