Abstract
Planktonic foraminifera and ostracods of the upper Barremian (?)–lower Aptian of the Kokluk section (Eastern Crimea) are studied. Three interval-zones are established based on foraminifera: Globigerinelloides blowi, Hedbergella ruka and H. excelsa. Beds with H. ruka are described as a zone. Based on ostracods, Robsoniella minima–Loxoella variealveolata Zone and Beds with Cytheropteron tesakovae are determined. An interval possibly corresponding to OAE 1a is ascertained. Species C. tesakovae is described as new. The Kokluk section is correlated with coeval sections Verkhorechie (South-Western Crimea) and Zavodskaya balka (Eastern Crimea). Paleoecological analyses of the Kokluk section is made.
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