Abstract

As a result of complex interdisciplinary studies, the existence of much more complex glacial-interglacial climatic rhythms than previously thought was revealed in the Neopleistocene history of the Oka–Don Loess Province. We have established nine warm epochs (seven interglacials, two interstadials, including the Holocene) and eight interglacial epochs or cooling periods over the last 0.7–0.8 m.y. The sequence of the development of the ice sheets and the interglacial periods in the Early and Middle Neopleistocene is significantly revised. In the Early Neopleistocene, another glacial-interglacial macrocycle was identified in the interval between MIS 15 and MIS 12. In the Middle Neopleistocene, an alternation of three macrocycles was established instead of two previously identified ones. The concept of landscape and climatic changes within interglacial epochs has become more complex. The paleopedological materials on the Ilyinka, Muchkap, Kamenka and Mikulino interglacials indicate the existence of several phases within them, corresponding to two or more optima. It is shown that the Muchkap interglacial was the most humid and heat-provided thermochron in the series of interglacial epochs. The evolution of interglacial pedogenesis and the natural environment over the last ~780 000 years has been traced. The main climatic trend that determined the development of the natural environment and the evolution of landscapes in the geological history of the Oka–Don Loess Province was the directed cooling from the Early Pleistocene Interglacial epoch to the Late Pleistocene epoch. A similar trend toward increasing severity and continentality of the climate is observed for the glacial epochs. The interregional correlation of deposits and events of the Neopleistocene in glacial and periglacial regions in the Don, Dnieper, Volga, and Kama basins was performed.

中文翻译：

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Oka-Don 冰缘黄土省的新更新世：地层学、古地理、相关性

摘要

由于复杂的跨学科研究，奥卡-顿黄土省的新更新世历史揭示了比以前认为的更复杂的冰期-间冰期气候节律的存在。在过去的 0.7-0.8 年间，我们建立了 9 个暖纪（7 个间冰期，2 个间冰期，包括全新世）和 8 个间冰期或冷却期。进行了重大修订。在新更新世早期，在 MIS 15 和 MIS 12 之间的间隔内发现了另一个冰期-间冰期大循环。在新更新世中期，建立了三个大循环的交替，而不是先前确定的两个大循环。间冰期景观和气候变化的概念变得更加复杂。Ilyinka、Muchkap、Kamenka 和 Mikulino 间冰期的古土壤学材料表明其中存在多个阶段，对应于两个或多个最佳阶段。研究表明，Muchkap 间冰期是一系列间冰期中最潮湿和供热最热的恒温期。已经追踪了过去~780 000 年间冰期成土作用和自然环境的演变。早更新世间冰期至晚更新世的定向降温是奥卡-顿黄土省地质史上决定自然环境发展和景观演变的主要气候趋势。在冰川时期观察到气候的严重性和大陆性增加的类似趋势。进行了顿河、第聂伯河、伏尔加河和卡马盆地冰川和冰缘地区新更新世沉积物和事件的区域间关联。