Abstract—

The Cenozoic marine deposits (two formations) developed in the eastern part of the Opukha–Pekulney Depression of the Koryak Upland are described. Until recently, there was scarce information about them. The lower (Retyrveem) formation is composed of dark conglomerates and sandstones with a large number of carbonate nodules and representative assemblages of bivalve and gastropod mollusks (more than 400 tests and imprints were studied) and Early Eocene benthic foraminifers. Two subformations and six units were distinguished in the formation. The upper (Morzhovaya) formation is composed of light loose gravestones and sandstones, including fragments of Early Miocene mollusks and foraminifers. The study of faunal assemblages makes it possible to correlate these formations with stratigraphic units of adjacent areas and to reveal hiatuses in the section covering most of the Paleocene sequence, on one hand, and the Upper Eocene and Oligocene, on the other hand. The Retyrveem Formation encloses warm-water molluscan assemblages, the appearance of which in the northern boreal latitudes is supposed to be related to the Early Eocene global warming. Images of the characteristic molluscan remains are given for the first time.

中文翻译：

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俄罗斯东北科里亚克高地Opukha-Pekulney凹陷东部的新生代地层

摘要—

描述了在科里亚克山地Opukha-Pekulney凹陷东部形成的新生代海相沉积（两个地层）。直到最近，关于它们的信息还很少。下部（雷特尔韦姆）地层由深色砾岩和砂岩组成，具有大量碳酸盐结节，以及代表性的双壳类和腹足类软体动物（研究了400多个试验和印记）和早期始新世底栖有孔虫。在该编队中区分了两个子编队和六个单元。上部（Morzhovaya）地层由轻质疏松的墓碑和砂岩组成，包括早期中新世软体动物和有孔虫的碎片。对动物群的研究使得将这些地层与邻近地区的地层单元联系起来，一方面揭示了大部分古新世层序的剖面，又揭示了上新世和渐新世的剖面中的裂隙成为可能。Retyrveem地层包裹着温水软体动物组合，其出现在北部的北纬地区与早期始新世的全球变暖有关。首次给出特征性软体动物残骸的图像。