Paleovalleys and Paleodepressions of the Kara Sea Vostochno-Prinovozemelsky Area

U-shaped and V-shaped palleovalleys and paleodepressions are identified on multifrequency seismic data in near-surface section (NSS) within three study areas in Vostochno-Prinovozemelsky area. Valleys of the Late Cretaceous and Quaternary ages and of different genesis are found in the first area of...

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Bibliographic Details
Published in:Moscow University geology bulletin 2023-06, Vol.78 (3), p.403-412
Main Authors: Zamotina, Z. S., Starovoytov, A. V., Tokarev, M. Yu, Terekhina, Ya. E., Kolubakin, A. A., Goncharova, A. M.
Format: Article
Language:English
Subjects:
Archipelagoes
Cretaceous
Earth and Environmental Science
Earth Sciences
Geology
Glacial deposits
Glaciation
Quaternary
Rivers
Seismic data
Submarine valleys
Valleys
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Summary:U-shaped and V-shaped palleovalleys and paleodepressions are identified on multifrequency seismic data in near-surface section (NSS) within three study areas in Vostochno-Prinovozemelsky area. Valleys of the Late Cretaceous and Quaternary ages and of different genesis are found in the first area of study. The palleovalleys of the Late Cretaceous age are V-shaped and U-shaped by their characteristic morphological properties and are likely formed as a result of the rivers erosional activity. Genesis of the buried valleys filled with Quaternary glacial sediments is usually connected to glacial plucking of the Late Quaternary glaciation, and they are similar to U-shaped paleovalleys. The tunnel valleys of Quaternary age that most likely were formed as a result from impact of ice sheet located to the east of the Novaya Zemlya archipelago in the Late Quaternary age were observed in the second study area. In contrast to the first two sites, isometric depressions of Quaternary age and controversial genesis were observed in the third one. The direction of the identified paleovalleys in some cases coincides with the submarine valleys indicated on the USSR Northern Seas submarine valleys map (Lastochkin, 1977) and the Kara Sea geomorphological map (Miroshnikov et al., 2021).
ISSN:0145-8752
1934-8436
DOI:10.3103/S014587522303016X