Volcano-sedimentary rocks of the Sortavala Group: A habitat of ancient microorganisms

Аннотация

The assemblages of fossilized microorganisms from volcano-sedimentary material sandwiched between basaltic lava flows in Early Proterozoic (2.0 Ga ago) volcanics of the Sortavala Group of the Sortavala Uplift (northern Lake Ladoga region, near the village of Kharlu) are studied. It is confirmed that volcanogenic and volcano-sedimentary rocks are of significance for bacterial paleontology.