Abstract

An integrated study of the Campanian–Maastrichtian deposits of Beshkosh Mountain (Southwest Crimea) was carried out. The finds of cephalopods and dinocysts were studied, and ichnofacies and sedimentological analyses were performed. Isotopic, paleomagnetic, and petromagnetic data were obtained for the first time. New macro- and micropaleontological data made it possible to refine the stratigraphic subdivision of the section and confirm its late Campanian–Maastrichtian age. Paleomagnetic studies have revealed no analogs of magnetic Chron C31r. The only recognizable reversed-polarity magnetozone against the background of the prevailing normal polarity was identified as an analog of Chron C30r. The study of dinocysts revealed a sharp change in their assemblages in the lower part of the section, above which ammonite Pachydiscus (P.) neubergicus neubergicus (Hauer), a marker species of the Campanian–Maastrichtian boundary, was found. An integrated biostratigraphic, magnetostratigraphic, and sedimentological analysis made it possible to recognize the previously unknown unconformity in the Campanian–Maastrichtian boundary interval. Data of stable isotopes are consistent with the proposed hiatus.

中文翻译：

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西南克里米亚Beshkosh山的Campanian–Maastrichtian的新沉积学，磁地层学和生物地层学数据

摘要

对Beshkosh山（西南克里米亚）的Campanian-Maastrichtian矿床进行了综合研究。研究了头足类和恐龙囊的发现，并进行了岩相和沉积学分析。同位素，古磁和石油磁数据是首次获得的。新的宏观和微观古生物学数据使该断层的地层细分得以完善，并确定了该区的坎潘期至马斯特里赫特期。古磁性研究表明，没有磁性Chron C31r的类似物。在现行的正常极性背景下，唯一可识别的反极性磁区被确定为Chron C30r的类似物。对藻囊的研究表明，在下部的上方，其上有炸药Pachydiscus，其组合急剧变化。 （P.）  neubergicus neubergicus  （Hauer）是Campanian-Maastrichtian边界的标志物种。综合的生物地层，磁地层和沉积学分析使人们能够认识到坎帕尼一马斯特里赫特边界区间先前未知的不整合面。稳定同位素的数据与提出的裂隙一致。