Microbiostratigraphy of the Berriasian–Valanginian boundary in eastern Crimea: foraminifers, ostracods, organic-walled dinoflagellate cysts
Published: Dec 2017
Pages: 517 - 529
DOI: https://doi.org/10.1515/geoca-2017-0034
Authors: YULIYA N. SAVELIEVA, OLGA V. SHUREKOVA, ANNA A. FEODOROVA, VLADIMIR V. ARKADIEV , VLADIMIR A. GRISHCHENKO, ANDREI YU.GUZHIKOV , ALEKSEY G. MANIKIN
Abstract: Thorough study of foraminifers, ostracods and dinoflagellate remnants from the Zavodskaya Balka and Koklyuk sections helps to characterize the detailed biostratigraphic division of the Berriasian / Valanginian boundary sequence in the Feodosiya district of eastern Crimea. The foraminifer and dinocyst associations from the lower part of the sequence are clearly comparable with common Berriasian associations throughout all Mountain Crimea. On the other hand, foraminifer, ostracod and dinocyst associations from its upper part have been recorded only in eastern Crimea. The upper foraminifer level corresponds to the boreal ammonite zones from the Tauricum–Verrucosum (Upper Berriasian–Valanginian). Most of the ostracod species are endemic. The base of the uppermost dinocyst level correlates with the Lower Valanginian Paratollia zone from north-western Europe.
Keywords: Eastern Crimea, Berriasian, Valanginian, biostratigraphy, foraminifers, ostracods, organic-walled dinoflagellate cysts
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Volume 68 no. 6 / December 2017
VLADIMIR V. ARKADIEV, VLADIMIR A. GRISHCHENKO, ANDREI YU. GUZHIKOV, ALEKSEY G. MANIKIN, YULIYA N. SAVELIEVA, ANNA A. FEODOROVA, OLGA V. SHUREKOVA
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