Sedimentation in the submarine Shirshov Ridge area (Bering Sea) during the last 180–185 ka (Penultimate glaciation-Holocene)
| Autor: | Elena Ivanova, T. G. Kuz’mina, T. N. Alekseeva, E. A. Ovsepyan, I. O. Murdmaa, E. A. Seitkalieva |
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| Rok vydání: | 2015 |
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| Zdroj: | Lithology and Mineral Resources. 50:341-360 |
| ISSN: | 1608-3229 0024-4902 |
| Popis: | The lithological analysis of sediments from Core SO201-2-85KL (18 m long) taken from the Shirshov Ridge in the western part of the Bering Sea (57°30.30′ N, 170°24.79′ E, water depth 968 m), which recovered the section spanning from the penultimate glaciation till Holocene, revealed their mostly terrigenous composition with several intercalations of diatomaceous ooze. The latter was accumulated mainly during relatively warm epochs (last interglacial and Holocene) with elevated bioproductivity of surface waters. Sedimentation during the penultimate glaciation was strongly influenced by bottom currents. Ice rafting of detrital material was intensified during cold marine isotope stages (MIS 6, MIS 4, MIS 2). Glaciations were accompanied by increased sedimentation rates probably due to the glacioeustatic sea level falls, desiccation of the Bering Sea shelf, and enhanced influx of sedimentary material transported by large rivers immediately to the deepwater basin. |
| Databáze: | OpenAIRE |
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