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BIOSTRATIGRAPHY OF SENOMANIAN GAS DEPOSITIONS OF THE NORTHERN PALEOGEOGEOGRAPHICAL REGIONS OF WEST SIBERIA (ON FORAMINIFER EVIDENCE)

V. M. Podobina, G. M. Tatiyanin

National Research Tomsk State University, Tomsk, Russia

The article summarizes the biostratigraphy of the Cenomanian marine sediments within the northern paleobiogeographical area. In this region sections of some wells of Van-Yeganskaya, Parusovaya and Yamal areas were studied. The article presents data on Senomanian marine deposits in the section of well E-150 in the south-eastern area. Agglutinized quartziferous-silicious foraminifera typical of Cenomanian were found in the Uvat Horizon presented by marine facies. The similarity of the Cenomanian species of the West Siberian and Canadian provinces made it possible to classify them as a single Arctic paleobiogeographic region of the same-named circumpolar belt.

Keywords: Cenomanian, Uvat Horizon, foraminifera, northern paleobiogeographic region, West Siberian province.

DOI 10.20403/2078-0575-2018-2-13-23