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doi: 10.24412/2687-1092-2024-11-28-32
1Institute of Geography RAS, Moscow, Russia 2FRECOM, Moscow, Russia 3Aikino Secondary comprehensive school, Aikino, Komi Republic, Russia
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Abstract. During 2024 fieldwork on the Vychegda River right bank near Gam, Komi Republic, we researched the geological and geomorphological structure of the so-called "Gam terrace". Here, alluvial, glacial and fluvioglacial deposits were uncovered under the cover-slope layer, which does not confirm the previously assumed lacustrine (lake-glacial) origin of this surface. Only a narrow strip along the riverbed 100 – 150 m wide we can attribute to the high floodplain terrace of the Vychegda River. In the rear part of the so-called "Gam terrace", we uncovered an incision, presumably filled with fluvioglacial deposits of the Late Vychegda age. We selected the incision deposits and the terrace alluvium for dating using the optically stimulated luminescence (OSL) method. Keywords: Vychegda, Gam terrace, Proglacial Lake, Middle Neopleistocene, Late Neopleistocene
REFERENСES: Grosvald M.G., Lavrov A.S., Potapenko L.M. The Markhida-Welt glacial stage: a double surge of the Barents Ice Sheet? // Materials of glaciological studies. Chronicle, discussions. 1974. № 24. P. 173–188. Lavrov A.S., Potapenko L.M. Neopleistocene of the North-East of the Russian Plain. Moscow: Aerogeologiya, 2005. 221 p. Lavrov A.S., Potapenko L.M. Neopleistocene of the Pechora Lowland and Western Pritimanye (stratigraphy, paleogeography, chronology). Mozhaisk: MPK, 2012, 191 p. Lyså A., Larsen E., Buylaert J.-P., Fredin O., Jensen M., Kuznetsov D., Murray A.S., Subetto D.A., Van Welden A. Late Pleistocene stratigraphy and sedimentary environments of the Severnaya Dvina-Vychegda region in northwestern Russia // Boreas. 2014. Vol. 43. Is. 4. P. 759–779. doi: 10.1111/bor.12080 Neal J., Hawker L. FABDEM V1-2, 2023. doi: 10.5523/bris.s5hqmjcdj8yo2ibzi9b4ew3sn Panin A., Zaretskaya N., Baranov D., Utkina A., Kurbanov R. Terraces of the lower Vychegda River, northern European Russia, as an aid to clarifying the Late Pleistocene glacial and proglacial events in the eastern margin of the last Scandinavian Ice Sheet // Earth Surface Processes and Landforms, in press. Potapenko L.M. The structure and the conditions of forming of the Vychegda River basin terraces // Moscow University Bulletin. Series 5, Geography. 1971. № 3. P. 97–104. Zaretskaya N.E., Baranov D.V., Panin A.V., Kurbanov R.N., Karmanov V.N. The phenomenon of the Gam terrace in the Northern Dvina basin // “Actual problems of Pleistocene and Holocene paleogeography”: Proceedings of the All-Russian conference with international participation “Markov Readings 2020”. Moscow: Faculty of Geography, Moscow State University, 2020, p. 129–133. Zaretskaya N., Panin A., Molod'kov A., Trofimova S., Simakova A., Baranov D. Pleistocene stratigraphy of the Vychegda River basin, European North-East // Quaternary International. 2020. Vol. 546. P. 185–195. doi: 10.1016/j.quaint.2019.09.020 Zaretskaya N., Utkina A., Baranov D., Panin A., Trofimova S., Simakova A., Kurbanov R. Limited extension of the MIS 2 proglacial lake in the Severnaya Dvina valley, south‐eastern margin of the last Scandinavian Ice Sheet // Journal of Quaternary Science. 2024. Vol. 39. Is. 1. P. 82–101. doi: 10.1002/jqs.3570
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Cite this article:
Baranov D.V., Kachalov A.Yu., Ukraintsev V.Yu., Vlasov M.V., Korolev V.V., Panin A.V. Geological and geomorphological structure of the Vychegda river right bank near Gam, Komi Republic // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2024. Issue 11. P. 28-32. doi: 10.24412/2687-1092-2024-11-28-32
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