PLIOCENE-QUATERNARY BIOSTRATIGRAPHY AND PLANKTONIC FORAMINIFERA EVOLUTION IN THE NORTH PACIFIC

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dc.contributor.author Bubenshchikova N.V.
dc.contributor.author Blyum N.S.
dc.date.accessioned 2020-11-30T07:32:09Z
dc.date.available 2020-11-30T07:32:09Z
dc.date.issued 1996
dc.identifier https://elibrary.ru/item.asp?id=13227859
dc.identifier.citation Stratigraphy and Geological Correlation, 1996, , 3, 277-286
dc.identifier.issn 0869-5938
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/19930
dc.description.abstract In analysis of the stratigraphic distribution of planktonic foraminifers in the Pliocene–Lower Quaternary sediments of the North Pacific, and research of the space-time distribution dynamics of 60 species at four levels corresponding to the foraminiferal zones N 19, N 20, N 21, and N 22 revealed, significant evolutionary changes at that time were revealed. Twenty-five species became extinct and ten species appeared. Since the early Pliocene, the foraminifer diversity decreased from 53 to 34 species. Three groups of species were revealed: (1) short-lived species; (2) species who reduced and extended distribution areas and abundances, and (3) species whose distribution patterns remained relatively stable. It was shown that the reduction of distribution areas proceeded from the periphery toward the center (i.e., toward the areas with the highest abundances) and, in contrast, distribution areas of the newly appearing and evolving species expanded from their center toward the periphery
dc.subject Quaternary en
dc.subject Pliocene en
dc.title PLIOCENE-QUATERNARY BIOSTRATIGRAPHY AND PLANKTONIC FORAMINIFERA EVOLUTION IN THE NORTH PACIFIC
dc.type Статья
dc.subject.age Cenozoic::Neogene::Pliocene en
dc.subject.age Cenozoic::Quaternary en
dc.subject.age Кайнозой::Четвертичная ru
dc.subject.age Кайнозой::Неоген::Плиоцен ru


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