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Correlation of the paleogeographic events of the Caspian Sea and Russian Plain during the last climatic macrocycleтезисы доклада
- Авторы: Yanina T., Sorokin V., Svitoch A., Kurbanov R., Sychev N., Tkach N.
- Сборник: PAGES 5 Open Science Meeting Global challenges for our common future: a paleoscience perspective. Abstract book
- Тезисы
- Год издания: 2017
- Место издания: http://www.pages-osm.org/osm/
- Первая страница: 145
- Последняя страница: 145
- Аннотация: The problem of correlation between transgressive-regressive oscillations in the Caspian and glacial events on the Russian Plain is of great importance in Pleistocene paleogeography. At the present moment, there is no unequivocal opinion on the problem. According to the view of the present authors, many factors (neotectonic movements, sedimentation in the basin, the restructuring of the hydrographic network) have affected the transgressive-regressive rhythm of the Caspian Sea, chief of which is the global climate rhythm. This work presents the data obtained by the authors during the last years. They allow us to specify relationships and synchronization of events in the Caspian Sea and on the Russian Plain. 1). The event scheme of the Caspian Sea includes the two phases (Late Khazarian and Girkanian) of Khazarian transgression that developed during the MIS 5 epoch: stages. The each peak of warming of MIS 5 in the Lower Volga area led to an interval of soil formation. 2). OSL and 14C dating confirm the development of the Atelian regression of the Caspian Sea during the epoch of MIS 4 glaciations on Russian Plain, and they fix its end during an epoch of interstadial warming MIS 3. 3) The first stage of the Khvalynian transgression took place during the second half of the interstadial warming of MIS 3. 4) The LGM in Eastern Europe was reflected in the development of a falling sea level in the Caspian Sea. 5). The epoch of degradation of the Late Valdai glacial stage (MIS 2) corresponded to the time of sea-level rise in the Caspian Sea and the accumulation of the thickness of Khvalynian chocolate clays. During the late Pleistocene epoch, the Manych threshold was breached three times resulting in overflow into the Pontian Basin.
- Добавил в систему: Янина Тамара Алексеевна