Fossilized Cambrian Organisms and Ichnofossils in the Podlassko-Brest Depression of Southern Belarus

Taxonomic composition and biostratigraphic distribution of organic-walled microfossils and trace fossils are analyzed in Skvieryki-1s and Vychulkovskaya-201 boreholes at the southern Podlassko-Brest Depression in Belarus. The studied sections host three assemblages: two of the Lower Cambrian age corresponding to Rovno–Lontova and Dominopol’–Vergale–lower Rausve regional stages and one in the Lower–Middle Cambrian strata (upper Rausve–Kybartai regional stages). The new data expand the paleontological characteristic of the Lower Cambrian. For the first time, isolated sclerites of Wiwaxia sp. and undescribed microfossils provisionally interpreted as fragments of a mollusk radula are found in the Bug and Velikovichi formations in Belarus. These stratigraphic units also host horizontal and vertical burrows. These biostratigraphic data will help for future paleobiological, stratigraphic and paleogeographic studies.