Fossils from the Arkhangelsk region of 500 million years old turned out to be those of cyanobacteria
In the new study, Russian scientists investigated the organic traces left by the microorganisms called Beltanelliformis. They were found in the Arkhangelsk region and represent rounded imprints left by clusters of these organisms in the Vendian deposits more than 500 million years ago. A thin film of organic matter remains on the surface of these prints — the remains of ancient organisms.
Scientists have analyzed the substances, and found that they are characteristic of cyanobacteria. The researchers concluded that the Beltanelliformis were colonial cyanobacteria.