Climatic Fluctuations and Sedimentation Conditions of the Turonian–Coniacian Sediments of the Northwest Caucasus

Yakovishina, E.V.; Bordunov, S.I.; Kopaevich, L.F.; Netreba, D.A.; Krasnova, E.A.

Авторы: Yakovishina E.V., Bordunov S.I., Kopaevich L.F., Netreba D.A., Krasnova E.A.
Журнал: Stratigraphy and Geological Correlation
Том: 30
Номер: 3
Год издания: 2022
Издательство: Pleiades Publishing, Inc.
Местоположение издательства: New York, USA
Первая страница: 147
Последняя страница: 166
DOI: 10.1134/s0869593822030066
Аннотация: Abstract—The results of integrated study of the Turonian–Coniacian sediments from the Abinsky district(Northwest Caucasus), which are represented by a rhythmic terrigenous-carbonate sequence, are discussed.The use of microfacial, X-ray diffraction, isotope, and micropaleontological analyses allowed us to revealimportant changes in abiotic and biotic evolution during this interval. The peculiarities of carbonate sedimentation, as well as changes in the composition of foraminiferal assemblages, helped to establish fluctuations inthe relative sea level, whereas isotopic studies assisted in defining climatic fluctuations. During the periods ofaccumulation of carbonate and clayey material, the area was occupied by a relatively deep-water open-seabasin with normal salinity. In the background of high temperatures, cooling pulses are also recorded withinthe studied interval. The position of the Turonian–Coniacian boundary in the section is revised.Keywords: Caucasus, Upper Cretaceous, Turonian, Coniacian, carbonates, lithology, stratigraphy, foraminifera, carbon and oxygen isotopes
Добавил в систему: Яковишина Елена Васильевна

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Climatic Fluctuations and Sedimentation Conditions of the Turonian–Coniacian Sediments of the Northwest Caucasusстатья

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