At the first is studied by the systematic composition ostracods of post-crater sediments in the Boltysh impact structure (10 genera, 17 species). Based on geographic distribution, stratigraphic position and paleoecology of ostracods the conclusions were drawn about the geological age of the post-crater sediments in the Boltysh structure of the 463-415 m, paleogeographic reconstruction of the Boltysh basin in Paleogene.

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