Abstract

The diatom assemblage of the Veshenskaya Formation studied in the borehole P-321 of the Cis-Donets monocline (southern part of the Russian Plate) is assigned to the lower Ypresian Moisseevia uralensis Zone. According to the available data, this zone corresponds to the Deflandrea oebisfeldensis and Dracodinium (=Wetzeliella) astra dinocyst zones and, accordingly, to the nanoplankton NP10 Zone. The presence of the zonal silicoflagellate species Naviculopsis foliacea confirms the Early Eocene age of the Veshenskaya Formation. The taxonomic similarity of diatoms and silicoflagellates of the region under consideration with silicofossil assemblages of Northern Europe suggests a stable link between these paleobasins at the beginning of the Early Eocene.

中文翻译：

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顺-顿涅茨单斜（俄罗斯板块）的早始新世硅藻和硅鞭毛藻：生物地层和古地理方法

摘要

在独联体-顿涅茨单斜（俄罗斯板块南部）的钻孔 P-321 中研究的 Veshenskaya 组硅藻组合被分配到伊普雷西亚 Moissevia uralensis 下部带。根据现有数据，该区域对应于 Deflandrea oebisfeldensis 和 Dracodinium (= Wetzeliella) astra dinocyst 区域，因此，对应于纳米浮游生物 NP10 区域。带状硅鞭毛藻物种Naviculopsis foliacea的存在证实了 Veshenskaya 组的早始新世时代。该地区的硅藻和硅鞭毛藻与北欧的硅化石组合在分类学上的相似性表明，在早始新世初期，这些古盆地之间存在稳定的联系。