STRATIGRAPHIC SUBDIVISION OF THE PALEOGENE DEPOSITS OF THE KARAKATA DEPRESSION OF KYZYLKUM
Kozhakhmet K. Kushakov A.R. Kushakov F.A. Kurbоnova M.M. Aripova M.K.
2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025Issue 2137 - 151 pp.
The article is devoted to the stratigraphic division of Paleogene sediments of the Karakatinsky depression of Kyzylkum. Before the Eocene, the Kyzylkum landmass separated the Amudarya and Ustyurt-Aral basins, which significantly differed in their hydrodynamic and hydrochemical regimes during the Paleocene period and at the beginning of the Eocene, shallow basins existed in both the eastern and western parts of the Kyzylkums. The eastern part of the territory, adjacent to the hilly land area, hypsometrically occupied a more elevated area compared to the western one. The sedimentation basin of this area in the Paleogene period was mostly shallow, with frequent changes in salinity in the direction of its increase or decrease, with enhanced hydrodynamics, with the predominance of sulfate sedimentation in certain time periods, with its own specific organic world. In the west of Uzbekistan, whose border runs approximately along the zone of the deep transverse fault, in the Paleogene there was a normal marine basin with stable sedimentation, with planktonic foraminifera and more representative nannoplanktonic forms. These groups of organic remains are reference, with clearly distinguished zonal complexes that allow for reliable correlation of strata with sections of the Caucasus, Crimea, and the Mediterranean. Identified on the basis of the method of complex biorhythmostratigraphic dissection and correlation of sections, the Akdzhar formation corresponds to the Montan stage, the lower Kyzyltakyr formation corresponds to the Tanet stage of the Paleocene, the upper Kyzyltakyr-Karashor formation corresponds to the Ypres stage of the Early Eocene, the Ilyalin formation corresponds to the Lutetian stage of the Middle Eocene, the Kurtish formation corresponds to the Barton stage, the Akhchakainsky and Daudansky formations-the Obobsonian stage of the Late Eocene, which It allows correlating sections of the Kyzylkum Paleogene with both regional and International scales.
Akhchakainskaya , Ilyalinskaya , Karakata , Karashor , Kurtishskaya , Kyzyltakyr
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Sh. Yessenov Caspian University of Technology and Engineering, Aktau, Kazakhstan
National University of Uzbekistan named Mirzo Ulug‘bek, Uzbekistan
Tashkent State Transport University, Tashkent, Uzbekistan
Sh. Yessenov Caspian University of Technology and Engineering
National University of Uzbekistan named Mirzo Ulug‘bek
Tashkent State Transport University
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