Bivalve shells and ammonite

Ammonite sandwich!

Ostrea oysters, which are types of bivalves, can fix themselves to hard substrates and grow upon these. In this instance, two oysters attached themselves to either side of a dead ammonite’s shell, and almost encompassed it. Perhaps the seafloor was too soft for them to attach to.

Find out more about ammonites on the molluscs pages.

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Common name

Bivalve shells and ammonite

Scientific name

Pavlovia rotunda

Type

Molluscs > Cephalopods


Strata

Kimmeridge Clay Formation

Time period

Upper Jurassic

Age

150 million years

Where found

Kimmeridge

Found by

Unknown

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.05839