NEW DATA ON THE MARINE PALEOGENE OF THE SOUTHWESTERN SIBERIAN PLATE, PAPER 1

Abstract

The Paleocene-Eocene marine deposits recovered by two reference boreholes (011BP and 9) in the Omsk depression, the southwestern Siberian plate, have been comprehensively studied in various paleontological aspects. Geology of the depression and associated Chany basin, which are structural elements of the Barabinsk lithologic-facies zone, is briefly described. Zonal assemblages of radiolarians, diatoms, ostracodes, benthic and planktonic foraminifers, organic-walled phytoplankton, spores and pollen are characterized. Biostratigraphic data are supplemented with lithological description of regional formations and with results of the electric logging and magnetostratigraphic study of Paleogene deposits that has been carried out for the first time in the West Siberian plate.