Abstract

This work presents the results of determination of foraminifers and nannoplankton from the Upper Cretaceous deposits of the Alan-Kyr section (the central part of the Crimean Mountains). The interpretation of these data, together with previously obtained palynological and paleomagnetic data, allow us to justify the age of country deposits. In the lower part of the section, beds with planktonic foraminifera are correlated with the Santonian part of the Dicarinella asymetrica Zone. The benthic foraminiferal assemblages also belong to the Santonian interval and allow us to subdivide this interval in more detail. Based on the nannoplankton data the transitional Zone CC17 was identified, which corresponds to the Upper Santonian–Lower Campanian. The base of a probable analogue of Chron C33r is distinguished within these deposits and is proposed for use as a primary feature to define the lower boundary of the Campanian.

中文翻译：

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Santonian–Campanian边界在Alan-Kyr断面（中克里米亚）：新的微古生物学数据

摘要

这项工作介绍了从Alan-Kyr断层（克里米亚山脉的中部）的上白垩纪沉积物中确定有孔虫和纳米浮游生物的结果。对这些数据的解释，再加上以前获得的孢粉和古磁数据，使我们能够证明国家存款的年龄是合理的。在该部分的下部，有浮游有孔虫的床与非双歧双歧杆菌区的桑顿时期相关。底栖有孔虫组合也属于桑顿时期，并允许我们更详细地细分该时期。根据纳米浮游生物数据，确定了过渡带CC17，它对应于上Santonian-Lower Campanian。