Late Weichselian fluvial evolution of the southern Kara Sea ...

• Main Authors: Dittmers, Klaus Hauke, Niessen, Frank, Stein, Ruediger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Siberian River Run-Off SIRRO; Ice Sheet; Kara Sea; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.738340; https://doi.pangaea.de/10.1594/PANGAEA.738340

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 ...