The Main Stages in Studying Quaternary Deposits of the White Sea and Controversial Problems of Its Late Pleistocene and Holocene Paleogeography
From the geological point of view, the White Sea is one the best studied basins. The first schemes of its evolution were put forward by I.K. Avilov based on the data obtained before 1950, and by M.A. Lavrova based on the results of studying coastal outcrops on the Kola and Onega peninsulas and in Ka...
Main Authors: | , , , , , , , , , , , , , , , |
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Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | Russian |
Published: |
Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya
2023
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Subjects: | |
Online Access: | https://izvestia.igras.ru/jour/article/view/1663 https://doi.org/10.31857/S2587556622060152 |
Summary: | From the geological point of view, the White Sea is one the best studied basins. The first schemes of its evolution were put forward by I.K. Avilov based on the data obtained before 1950, and by M.A. Lavrova based on the results of studying coastal outcrops on the Kola and Onega peninsulas and in Karelia. Research activities of the Institute of Oceanology, Academy of Sciences of the USSR, in the White Sea in 1964–1968 under the leadership of E.N. Nevesskii made it possible to present the first lithostratigraphic scheme of its Quaternary sequence and to distinguish the following stages in its evolution: glacial, glacial-marine, transitional, and marine. The onset of the first periglacial basins dates back to the Middle Dryas, while the glacier with surrounding ice shelves occupied a significant part of the White Sea basin. Besides extensive geological sampling, research activities of VSEGEI and Moscow State University in 1970–1986 included seismoacoustic profilingand side scan sonar survey, which were for the first time applied for the shelf geological survey. New data on the distribution of varved glaciolacustrine beds gave evidence for the initiation of water basin in the White Sea depression, which was later filled with the Barents Sea waters since the Allerød until the Boreal. Further studies (MAGE, Sevmorgeo, IO RAS, VSEGEI) made it possible to obtain fundamentally new geological and geophysical materials and to build geological maps at a scale of 1 : 1000000 for the entire seabed of the White Sea. These research activities included specific biostratigraphic studies and dating of the Quaternary sediment sequences. Specialists from KSC RAS, Institute of Lacustrine Research RAS, Moscow State University, Herzen Russian State Pedagogical University, and Institute of Geography RAS carried out coastal research that included drilling of lakes recently isolated from the sea. The latter made it possible to clarify the age and number of Postglacial transgressive-regressive cycles of the White Sea and to establish the ... |
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