Plant Stromatolite

Oldest fossils

Stromatolites are composed of algae that grew layer upon layer in shallow, saline lagoons. Water brought sediment which stuck to the algae and the algae responded by growing another layer, and so on, building up a dome-shaped structure. Stromatolites provide the earliest evidence of life on earth and date back more than 3.5 billion years. They can still be found alive today, most famously in Shark Bay, Australia.

Common name

Plant Stromatolite

Scientific name

Stromatolite

Type

Wood & Plants


Strata

Purbeck Limestone Group

Time period

Lower Cretaceous

Age

140 million years

Where found

Unknown

Found by

Unknown

Museum

Portland Museum

Accession number

POLPM.1998.PM.F41