Rock

Complex name but simple origin

This is a limestone composed of masses of crushed bivalve shells. That is where the ‘bio’ comes from. They are strongly cemented in a fine, calcium-rich mud, a ‘micrite’. The colour is due to the calcium carbonate that has crystallised into calcite cementing the rock together.

Find out more on the rocks and pseudofossils page.

Common name

Rock

Scientific name

Bored biomicrudite rock with ooliths

Type

Rocks and Pseudofossils


Strata

Corallian Group, Nothe Clay

Time period

Upper Jurassic

Age

160 million years

Where found

Bowlease Cove

Found by

Found by Paul Ensom in 1985

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.10693