Abstract

The paper presents the results of the study of Karginsky and Sartansky deposits of the Kolyma Lowland, synchronous with marine isotope stages (MIS) 3 and 2, and microphytofossils from them. During the accumulation of Karginsky deposits, various landscapes existed in this territory: communities of humid and dryish tundras, larch sparse forests, and tundra swamps, including habitats occupied by pioneer and steppe vegetation. The Sartansky deposits were formed under more uniform, cold and dry conditions. The results of the microbiomorphic study indicate the predominance of tundra herbaceous, mainly cereal associations in combination with the moss cover. Satisfactory preservation of microphytofossils from these strata is due to the specificity of the cryolithozone with a predominance of low temperatures throughout the year and low microbiological activity. The presence of spores and pollen with physical damage (ruptures and cracks) and corroded forms of phytoliths can be associated with their presence in the seasonally thawed layer during alternating freezing and thawing cycles.

中文翻译：

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Kolyma 低地新更新世上层 Karginsky 和 ​​Sartansky 沉积物的生物指示物及其在多次暴露于低温条件下的埋藏特征

摘要

本文介绍了对 Kolyma 低地的 Karginsky 和 ​​Sartansky 矿床的研究结果，与海洋同位素阶段 (MIS) 3 和 2 以及它们中的微植物化石同步。在卡尔金斯基矿床的积累过程中，这片土地上出现了各种景观：潮湿干燥的苔原群落、落叶松稀疏森林和苔原沼泽，包括先锋和草原植被占据的栖息地。Sartansky 矿床是在更均匀、寒冷和干燥的条件下形成的。微生物形态研究的结果表明苔原草本植物占优势，主要是谷物与苔藓覆盖相结合。从这些地层中令人满意地保存微植物化石是由于低温石带的特殊性，全年低温和低微生物活性占优势。孢子和花粉的存在与物理损伤（破裂和裂缝）和腐蚀形式的植硅体可能与它们在交替的冻融循环中季节性解冻层中的存在有关。