The Lower Paleozoic strata belonging to the Kara Basin are extensively exposed in the Severnaya Zemlya Archipelago. During the Cambrian, thick clastic sequences are the dominating sediments on Severnaya Zemlya. The Cambrian ...
Borehole 2506 drilled in the northern area of the Arkhangelsk Oblast penetrated through the Paleozoic sedimentary block isolated in the Vendian thick sequence. A diverse acritarch assemblage has been established within the ...
The bio- and lithostratigraphy of the poorly known early Ordovician (Arenig) Hunneberg Stage is described from the area east of St. Petersburg (Putilovo Quarry and Lava river), where the Lakity Beds (Leetse Fm.) consist ...