Palynostratigraphy of Oligocene-Miocene continental deposits in Southwestern Siberia |
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| Authors: | O B Kuz’mina B S Volkova |
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| Institution: | (1) Institute of Oil-and-Gas Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia |
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| Abstract: | Data on spores, pollen, and dinoflagellate cysts studied in composite section of Oligocene-Miocene deposits in southern part of West Siberia are presented. Eleven biostratigraphic units distinguished in the section are ranked as palynozones and beds with palynological assemblages. Palynological data substantiate age of deposits and specify ranges and boundaries of palynozones. Based on dinocyst assemblages first studied in sediments of the Zhuravka and Abrosimovo horizons (upper Oligocene, lower Miocene), the Pseudokomewuia Beds are included into local stratigraphic scheme. According to results of comparative analysis, similar and distinctive features of Oligocene-Miocene dinocyst assemblages from West Siberia, China and North America are elucidated. Based on palynological data, the local stratigraphic scheme of higher resolution is suggested for subdivision of Oligocene and Miocene deposits in southern part of West Siberia (Baraba and Kulunda lithofacies regions). |
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| Keywords: | pollen spores dinocysts Oligocene Miocene West Siberia palynostratigraphy |
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