Bivalve shell

These were freshwater mussels, but the green rock colour is from a mineral, glauconite, associated with sea sediments. We assume the glauconite is from an earlier marine sediment that was re-deposited in a lake.

Find out more about bivalves on the molluscs pages.

Common name

Bivalve shell

Scientific name

Unio

Type

Molluscs > Bivalves


Strata

Purbeck Limestone Group

Time period

Lower Cretaceous

Age

140 million years

Where found

Lulworth

Found by

Unknown

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.06413