THE NOVI PETRIVTSI REGIONAL STAGE OF THE MIOCENE OF THE NORTHERN UKRAINE

Abstract

Description of the Novi Petrivtsi Regional Stage of the Miocene of the Stratigraphic Scheme of the Neogene deposits of the Northern Ukraine is given. The Novi Petrivtsi Regional Stage is the first, oldest regional subdivision of this scheme. It corresponds to the Miocene part of the “Poltava stage” of the stratigraphic scheme of the end of XIX century of Lower Tertiary sediments of South Russia by N.A. Sokolov. The Novi Petrivtsi Regional Stage includes the Novi Petrivtsi Formation of the Dnipro-Donets Depression and Ukrainian Shield, the Chasov-Yar Strata, the Strata of clayey sticky sands, the Strata of quartz-siliceous pellites and sandstones of the western and south-western outskirts of Donets basin, lignite deposits and the Strata of dark gray clays of the Novo-Dmytrivka funnel sink. The Novi Petrivtsi Regional Stage reflects the step of the Miocene Sub-Paratethys history connecting with the formation of freshwater megalake within the Northern Ukraine paleosedimentological province after the regression of the last Paleogene sea basin (the late Oligocene, the Sivash time). The Novi Petrivtsi deposits together with the Mottled clays Strata make up the only sedimentation cycle known as the great lakes stage of the Eastern European Platform in the Miocene. Information on fresh-water mollusks, palynology and sporadic foraminifera of the Novi Petrivtsi Regional Stage of the Northern Ukraine is provided. The Novi Petrivtsi Regional Stage of the Northern UKraine is correlated with the Caucasian — Konkian regional stages of the Eastern Paratethys and dated Aquitanian — early Serravallian.