The results of the study of the cores from 10 to 50 m water depths which were taken in the area of such paleo- river valleys as Dnieper and Dniester are presented in this research. The tendency of sedimentation environment changes during the late Pleistocene – Holocene was characterized. The transgression in the beginning of the Holocene led to the changes in the matter composition, as well as to the changes in the balance of the sediments which come into the basin.

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