New data on the age of the Karangatian transgression of the Black Sea
Abstract
The Karangatian transgression of the Black Sea is a significant stage in its Pleistocene history. There is no consensus on the chronometric estimate of the age of this event. The paper presents the dating results for the Karangatian deposits cored from the Tuzla key section on the western coast of the Taman Peninsula. The mollusk shell composition of sediments indicates that the section reflects the peak phase of the transgression. A new absolute chronology bases on the dating by the method of infrared stimulated luminescence of feldspars. The distribution of credible intervals and the results of standard tests are in exact accordance with the ranges accepted in the operational practice of luminescence dating, thus the obtained results could be considered as reliable. The age of the Karangatian deposits of the Tuzla section matches with the time interval of 125–120 ka BP, which corresponds to the peak of the interglacial period (MIS 5e). The waters of the Karangat basin reached the section area about 125 ka BP, and the coastalmarine deposition began at 3.5 m AMSL. The basin level reached 5,3 m AMSL in 120 ka BP, the rise of 1,8 m during 5 thousand years. After 120 ka BP, the local marine sedimentation was insignificant. The subaerial deposition stage in the western part of the Taman Peninsula began about 100 ka BP. The section contains a loess-soil series with three layers of buried soils. An additional geochronological study of the upper part of the section will determine the age of these layers and reconstruct the substages of subaerial deposition stage of the Late Pleistocene regional history.
Supporting agencies: The studies were financially supported by the Russian Foundation for Basic Research (project no. 18-05-00296, field studies) and by the Russian Science Foundation (project no. 16-17-10103, geochronological analysis).
About the Authors
R. N. Kurbanov
Lomonosov Moscow State University;
Institute of Geography RAS
Russian Federation
Russian Federation
Faculty of Geography, Laboratory of Recent Deposits and Pleistocene Paleogeography, Senior Scientific Researcher, PhD in Geography;
Department of Quaternary Paleogeography, Senior Researcher
D. V. Semikolennykh
Institute of Geography of Russian Academy of Science
Russian Federation
PhD student
Russian Federation
PhD student
T. A. Yanina
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, Professor; Laboratory of Recent Deposits and Pleistocene Paleogeography, Head of the Laboratory, D.Sc. in Geography
N. A. Tyunin
Lomonosov Moscow State University
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, PhD student
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, PhD student
A. S. Murray
Aarhus University
Denmark
Department of Geosciences, Nordic Luminescence Laboratory, Professor
Denmark
Department of Geosciences, Nordic Luminescence Laboratory, Professor
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Review
For citations:
Kurbanov R.N., Semikolennykh D.V., Yanina T.A., Tyunin N.A., Murray A.S. New data on the age of the Karangatian transgression of the Black Sea. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2020;(6):139-145. (In Russ.)
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