Integrative characteristics of the Turonian-Coniacian boundary in the North-Western Caucasus

Авторы: Kopaevich L.F., Yakovishina E.V., Bordunov S.I.
Сборник: 11 International Cretacous Symposium, Warszawa, Poland, 2022
Серия: Abstract Volume
Тезисы
Год издания: 2022
Место издания: Warszawa, Poland, Faculty of Geologie, University of Warsaw
Первая страница: 217
Последняя страница: 219
Аннотация: The results of a comprehensive study of the boundary of the Turonian-Coniacian stages in the Upper Cretaceous deposits of the Abinsk region of the Northwestern Caucasus, represented by a rhythmic, essentially carbonate sequence of the hemipelagic type, are presented. The use of bio- and chemostratigraphic methods has made it possible to establish important changes in abiotic and biotic events in this stratigraphic interval. In the section, zones are established for planktonic and benthic foraminfers, and the position of the boundary of the Turonian and Coniacian stages is determined. Isotopic studies have helped to reveal climatic fluctuations and changes in the bioproductivity of the water column. The possibility of considering the Shapsugsky section as a hypostratotype (limitotype) of this boundary for the territory of the Russian Federation is considered.
Добавил в систему: Копаевич Людмила Федоровна

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