Abstract
On the basis of a comprehensive analysis of materials of geochemical, lithological and paleontological studies, the paleogeographic zones of the Volga time were traced. It was revealed that the sea zone with depths of 200-500 m occupied most of the south-western regions of Western Siberia. The zone of the sea with depths up to 100 m was close to the shore. In these zones, heterogeneous rocks of the Bazhenov Formation, the lower units of the Tutleim and Mulym’ya Formation and the upper unit of the Danilov Formation were formed with Corg concentrations from 8 to 0.5 %.
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