Abstract

The paper presents the results on stratigraphy and chronology of the Late Pleistocene obtained on the basis of both OSL and ¹⁴C dating of paleosols and sediments in the Aleksandrov quarry, located in the Central Russian Upland. As this section was confined to the paleo-ravine, its layers reflected multiple alternations of the stages of soil formation, cryogenesis, and sedimentation in the Late Pleistocene. The studied sequence is one of the most detailed soil-sedimentary terrestrial archives in Eastern Europe owing to its specific geomorphological position. The climate changes from the Mikulino interglacial (MIS 5e) to the Holocene (MIS 1) are reflected. The Ryshkovo pedolithic complex (MIS 5e, 127–117 ka) with extremely detailed pedogenetic stages lies at the base of paleodepression. The first Early Valdai cooling, which is reflected by the Seim stratum, has an OSL age of 115 ka. Two interstadial paleosols, Kukuevo and Streletsk, were formed in the Early Valdai time (MIS 5c and MIS 5a). The Mlodat loess separating them has an OSL age of 91 ka. The Middle Valdai is represented by two main interstadial paleosols, Alexandrovka (53 ka BP in ¹⁴C) and Bryansk (33 ka BP in ¹⁴C). In the filling of the Late Valdai dells, there are zoogenically processed late-glacial loams formed during warming epochs, Bølling and Allerød. The presented chronostratigraphic scheme is compared with analogs obtained for other loess-soil archives of Eastern, Central, and Western Europe.

中文翻译：

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从东欧平原冰外区（Aleksandrov 采石场）详细土壤沉积档案推断的晚更新世气候节律结构

摘要

本文介绍了基于 OSL 和¹⁴位于俄罗斯中部高地的 Aleksandrov 采石场的古土壤和沉积物的 C 年代测定。由于该部分仅限于古沟壑，其地层反映了晚更新世土壤形成、低温形成和沉积阶段的多次交替。由于其特定的地貌位置，所研究的序列是东欧最详细的土壤沉积陆地档案之一。反映了从 Mikulino 间冰期 (MIS 5e) 到全新世 (MIS 1) 的气候变化。具有极其详细的成土阶段的 Ryshkovo 土壤复合体 (MIS 5e, 127-117 ka) 位于古凹陷的底部。Seim 地层反映的第一次早期 Valdai 冷却具有 115 ka 的 OSL 年龄。两个间质古土壤，Kukuevo 和 Streletsk，形成于早期瓦尔代时期（MIS 5c 和 MIS 5a）。分隔它们的 Mlodat 黄土的 OSL 年龄为 91 ka。中瓦尔代有两个主要的间质古土壤，亚历山德罗夫卡（53 ka BP in¹⁴ C) 和布良斯克 (33 ka BP 在¹⁴ C)。在晚 Valdai 山谷的填充中，有在变暖时期形成的动物源加工的晚冰期壤土，Bølling 和 Allerød。提出的年代地层方案与从东欧、中欧和西欧的其他黄土-土壤档案中获得的类似物进行了比较。