Sponge

Fine detail

Sponges are often preserved in flint. The flint comes from silica that originated in the tiny needles or ‘spicules’ that other sponges used to build their bodies. The needles were scattered and buried in the sediment and then later dissolved away by ground water percolating down through the chalk.

Later still that silica could come out of solution, particularly where it found a silica hotspot in the form of another sponge. In this case, the entire sponge has been encased in silica with just some of the fine details of the structure still visible on the inside of this mould.

Find out more on the sponges page.

Common name

Sponge

Scientific name

Coeloscyphia racemosum

Type

Other


Strata

Chalk

Time period

Upper Cretaceous

Age

83 million years

Where found

Piddlehinton

Found by

Miss E Beames around 1974

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.08903