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Late Pleistocene in the southeastern White Sea and adjacent areas (Arkhangelsk region, Russia): Stratigraphy and palaeoenvironments
Quaternary International ( IF 2.2 ) Pub Date : 2020-10-29 , DOI: 10.1016/j.quaint.2020.10.057
Nataliya Zaretskaya , Aleksander Rybalko , Tatiana Repkina , Olga Shilova , Anton Krylov

An overview of the Late Pleistocene and Holocene stratigraphy of the southeastern White Sea region is presented in the paper, based upon the analysis of published data, new results, and correlation between marine and terrestrial archives. The Pleistocene stratigraphic record in the southeastern White Sea region begins with Mikulino Horizon, which comprises the whole MIS 5 and is composed of marine sediments – sands, sandy clays and clays – with Boreal, Arctic–Boreal and Lusitanean–Boreal microfauna and mollusc fauna, dated back at 161–77 ka. The Podporozhie Horizon in the southeastern White Sea region comprises the MIS 4 (71–57 ka) complex of marine mostly near-shore sediments. The glaciation during MIS 4 was localized, on one hand, within the Kola Peninsula. On the other hand, the glacier probably overlapped the Kanin Peninsula and the Mezen Bay, however the Gorlo Strait was not blocked and the northward river outflow was preserved. The Leningrad Horizon had been formed also in the marine sedimentation pattern during the MIS 3 (57–29 ka). However, the lack of data in the region allows us to make only the comparative analysis. The Ostashkov Horizon (MIS 2, 29–11.7 ka) is composed of the deposits of glacial paragenetic series: tills, glaciofluvial, glaciomarine, and glaciolacustrine deposits, but also comprises the deglaciation (Late Glacial) sedimentary complex including marginal tills. The Holocene stratigraphic record is subdivided into three stages – 11.7–9.5, 9.5–3.5 and 3.5–0 ka BP, and do not match with new formal stratigraphic subdivision of the Holocene series.



中文翻译:

白海东南部及邻近地区(俄罗斯阿尔汉格尔斯克地区)的晚更新世:地层和古环境

基于对已发表数据、新结果以及海洋和陆地档案之间的相关性的分析,本文概述了白海东南部地区晚更新世和全新世地层学。白海东南部地区的更新世地层记录始于 Mikulino Horizo​​n,它包括整个 MIS 5,由海洋沉积物——沙子、砂质粘土和粘土组成——以及北方、北极-北方和卢西坦-北方微型动物群和软体动物群,可追溯到 161–77 ka。白海东南部的 Podporozie 地平线包括 MIS 4 (71-57 ka) 海相主要近岸沉积物复合体。MIS 4 期间的冰川作用一方面位于科拉半岛内。另一方面,冰川可能与卡宁半岛和梅岑湾重叠,然而戈尔洛海峡并未被封锁,向北流出的河流得以保留。列宁格勒地平线也在 MIS 3 (57-29 ka) 期间的海洋沉积模式中形成。但是,由于该地区缺乏数据,我们只能进行比较分析。Ostashkov Horizo​​n (MIS 2, 29–11.7 ka) 由冰川共生系列的沉积物组成:tills、glaciofluvial、glaciomarine 和 glaciolacustrine 沉积物,但也包括冰川消退(晚冰川)沉积复合体,包括边缘耕作物。全新世地层记录细分为 11.7-9.5、9.5-3.5 和 3.5-0 ka BP 三个阶段,与全新世系列新的正式地层细分不匹配。列宁格勒地平线也在 MIS 3 (57-29 ka) 期间的海洋沉积模式中形成。但是,由于该地区缺乏数据,我们只能进行比较分析。Ostashkov Horizo​​n (MIS 2, 29–11.7 ka) 由冰川共生系列的沉积物组成:tills、glaciofluvial、glaciomarine 和 glaciolacustrine 沉积物,但也包括冰川消退(晚冰川)沉积复合体,包括边缘耕作物。全新世地层记录细分为 11.7-9.5、9.5-3.5 和 3.5-0 ka BP 三个阶段,与全新世系列新的正式地层细分不匹配。列宁格勒地平线也在 MIS 3 (57-29 ka) 期间的海洋沉积模式中形成。但是,由于该地区缺乏数据,我们只能进行比较分析。Ostashkov Horizo​​n (MIS 2, 29–11.7 ka) 由冰川共生系列的沉积物组成:tills、glaciofluvial、glaciomarine 和 glaciolacustrine 沉积物,但也包括冰川消退(晚冰川)沉积复合体,包括边缘耕作物。全新世地层记录细分为 11.7-9.5、9.5-3.5 和 3.5-0 ka BP 三个阶段,与全新世系列新的正式地层细分不匹配。7 ka) 由冰川共生系列的沉积物组成:tills、glaciofluvial、glaciomarine 和 glaciolacustrine 沉积物,但也包括冰川消退(晚冰川)沉积复合体,包括边缘耕作物。全新世地层记录细分为 11.7-9.5、9.5-3.5 和 3.5-0 ka BP 三个阶段,与全新世系列新的正式地层细分不匹配。7 ka) 由冰川共生系列的沉积物组成:tills、glaciofluvial、glaciomarine 和 glaciolacustrine 沉积物,但也包括冰川消退(晚冰川)沉积复合体,包括边缘耕作物。全新世地层记录细分为 11.7-9.5、9.5-3.5 和 3.5-0 ka BP 三个阶段,与全新世系列新的正式地层细分不匹配。

更新日期:2020-10-29
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