Trace fossil Burrow

Additional images

Burrow, not bone!

Thalassinoides is a large, branching burrow made by a shrimp. It is often filled with sediment that hardens, or is preserved in a different way to the rock around it. In this example, the branching ends look like the swollen ends of a bone, but it is not. Burrows like Thalassinoides are really useful in helping to determine the environment in which the rock formed. Today, identical burrows are found in shallow tropical and semi-tropical water and therefore it is not unreasonable to suggest that these rocks formed in a similar environment millions of years ago.

Find out more on the trace fossils page.

Common name

Trace fossil Burrow

Scientific name

Thalassinoides

Type

Trace Fossils


Strata

Cornbrash

Time period

Middle Jurassic

Age

165 million years

Where found

Ring Street, Stalbridge

Found by

Unknown

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.02267i-iii