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BIOSTRATIGRAPHY OF THE KUZNETSOVSKY HORIZON OF THE NORTHERN PALEOBIOGEOGRAPHICAL REGION OF WESTERN SIBERIA

V. M. Podobina, G. M. Tatyanin

National Research Tomsk State university, Tomsk, Russia

The Kuznetsovsky horizon has a widespread distribution in West Siberia and is mainly characterized by microfauna, less often by molluscs of the Turonian age. The most widespread are foraminifers of two complexes, namely, Gaudryinopsis angustus (Lower Turonian) and Pseudoclavulina hastata (Upper Turonian). New evidence on this group of microfauna has been obtained in well sections of the northern paleobiogeographical region. The West Siberian province is similar to foraminifer species of the Canadian province (Northern Alaska, Northern Canada) and therefore refers to the Arctic paleobiogeographic region of the same circumpolar belt.

Keywords: biostratigraphy, Kuznetsovsky horizon, foraminifera, Western Siberia.

DOI 10.20403/2078-0575-2018-4-30-40