Late Weichselian fluvial evolution of the southern Kara Sea ...
Glaciations had a profound impact on the global sea-level and particularly on the Arctic environments. One of the key questions related to this topic is, how did the discharge of the Siberian Ob and Yenisei rivers interact with a proximal ice sheet? In order to answer this question high-resolution (...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2008
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.738340 https://doi.pangaea.de/10.1594/PANGAEA.738340 |
| Summary: | Glaciations had a profound impact on the global sea-level and particularly on the Arctic environments. One of the key questions related to this topic is, how did the discharge of the Siberian Ob and Yenisei rivers interact with a proximal ice sheet? In order to answer this question high-resolution (1-12 kHz), shallow-penetration seismic profiles were collected on the passive continental margin of the Kara Sea Shelf to study the paleo-drainage pattern of the Ob and Yenisei rivers. Both rivers incised into the recent shelf, leaving filled and unfilled river channels and river canyons/valleys connecting to a complex paleo-drainage network.These channels have been subaerially formed during a regressive phase of the global sea-level during the Last Glacial Maximum. Beyond recent shelf depths of 120 m particle transport is manifested in submarine channel-levee complexes acting as conveyor for fluvial-derived fines. In the NE area, uniform draping sediments are observed. Major morphology determining factors are (1) ... : Supplement to: Dittmers, Klaus Hauke; Niessen, Frank; Stein, Ruediger (2008): Late Weichselian Fluvial Evolution on the Southern Kara Sea Shelf, North Siberia. Global and Planetary Change, 60(3-4), 327-350 ... |
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