For the first time, the task is to study the geomorphological features of the development of such negative landforms as depressions for platform conditions in Central and Eastern Siberia. The importance of the study of depressions is emphasized, especially for the insufficiently explored regions of the Central Siberian plateau. A brief generalization of the available geological and geomorphological materials is given for the six main, largest depressions of the Central Siberian plateau, formed in its various sites – from the very north to the southern borders (Popigayskaya, Aganylyiskaya, Essei-Muruktinskaya, Voevolikhanskaya, Verkhne-Vilyuiskaya and Khandinskaya). The character of location, morphology, and modern exogenous morphogenesis are described for these depressions. The localization of the depressions to different structural and geomorphological zones and types of morphostructures is noted. The main reasons of their occurrence and formation features were identified, among which, first of all, neotectonic movements and Quaternary glaciations should be called. The prevalence of leading fluvial, permafrost, and lacustrine processes in modern exogenous morphogenesis of the depressions was revealed, although their ratio varies depending on the location in different morphoclimatic zones (from the dominance of periglacial processes in the north to humid temperate zones in the south). The studied depressions are divided into three groups that differ in the features of the history of origin, morphology, and the nature of modern morphogenesis.

Vyrkin Vladimir Borisovich, Doctor of Sciences (Geography), Professor, Chief Researcher, V. B. Sochava Institute of Geography SB RAS, 1, Ulan-Batorskaya st., Irkutsk, 664033, Russian Federation, e-mail: vyrkin@irigs.irk.ru

Vyrkin V.B. Depressions of the Central Siberian Plateau: Location, Morphology and Modern Relief Formation. The Bulletin of Irkutsk State University. Series Earth Sciences, 2020, vol. 32, pp. 20-31. https://doi.org/10.26516/2073-3402.2020.32.20 (in Russian)

Adamenko O.M. Morfostruktura Sibirskoj platformy [Morphostructure of the Siberian Platform]. Geomorfology [Geomorphology], 1971, no. 1, pp. 12-21. (in Russian).

Andreeva S.M., Isaeva L.L. Dinamika lednikovogo pokrova severo-vostoka Sredne-Sibirskogo ploskogor'ya v pozdnem plejstocene [Dynamics of the ice sheet of the north-east of the Central Siberian Plateau in the Late Pleistocene]. Materialy glyaciologicheskih issledovanij [Data of Glaciological studies], 1987, vol. 61, pp. 112-118. (in Russian).

Vyrkin V. B. Sovremennoe ekzogennoe rel'efoobrazovanie kotlovin bajkal'skogo tipa [Modern exogenous relief formation of Baikal-type depressions]. Irkutsk, V.B. Sochava Institute of Geography SB RAS Publ., 1998. 175 p. (in Russian).

Masajtis V.L., Danilin A.N., Mashchak M.S. et al. Geologiya astroblem [Geology of astroblems] Leningrad, Nedra Publ., 1980. 231 p. (in Russian).

Krasnov I.I. (ed.) Geomorfologicheskaya karta Sibirskoj platformy. Masshtab 1:1 500 000 [Geomorphological map of the Siberian platform. Scale 1: 1,500,000]. Leningrad, Gosgeoltechizate Publ., 1959. 10l p. (in Russian).

Gosudarstvennaya geologicheskaya karta Rossijskoj Federacii. Masshtab 1:1 000 000 (tret'e pokolenie). List R-49-Olenek. Ob"yasnitelnaya zapiska [State geological map of the Russian Federation. Scale 1: 1,000,000 (third generation). Survey Sheet R-49-Oleneyk. Explanatory letter]. St. Peterburg, VSEGEI Cartographic factory Publ., 2016, 448 p. (in Russian).

Ditmar V.G. Geologicheskie issledovaniya v verhov'yah r. Vilyuya [Geological studies in the uppermost Vilyuy River]. Izvestiya Vsesoyuznogo geogrfficheskogo obchestva [Proceedings of the All-Union Geographical Society], 1934, vol. 66, no 1, pp. 26-68. (in Russian).

Isaeva L.L. Kraevye lednikovye obrazovaniya severo-zapada Srednesibirskogo ploskogor'ya [Marginal glacial landforms of the north-west of the Central Siberian plateau]. Kraevye obrazovaniya materikovyh oledenenij [Marginal formations of continental glaciations]. Moscow, Nauka Publ., 1972, pp. 205-211. (in Russian).

Korzhuev S.S. Srednyaya Sibir' [Central Siberia]. Ravniny i gory Sibiri. [Plains and mountains of Siberia]. Moscow, Nauka Publ., 1975. pp. 122-244. (in Russian).

Kul'chickij A.A. Geomorfologiya Severo-Zapadnogo Pribajkal'ya [Geomorphology of the Northwest Pribaikalye]. Nekotorye voprosy geomorfologii Vostochnoj Sibiri [Some issues of geomorphology of East Siberia]. Irkutsk, Publishing House of Irkutsk State University, 1981, pp. 53-81. (in Russian).

Masajtis V.L., Mihajlov V.M., Selivanovskaya T.V. Popigajskij meteoritnyj krater [Popigai meteorite crater]. Moscow, Nauka Publ., 1975, 124 p. (in Russian).

Meshcheryakov Yu. A. Strukturnaya geomorfologiya ravninnyh stran [Structural geomorphology of Plain Lands]. Moscow, Nauka Publ., 1965, 390 p. (in Russian).

N. A. Florensov (ed.). Ploskogor'ya i nizmennosti Vostochnoj Sibiri [Highlands and Lowlands of Eastern Siberia]. Moscow, Nauka Publ., 1971, 320 p. (in Russian).

Plotnikova M.I. Ocherk posleoligocenovoj istorii Popigajskoj impaktnoj morfostruktury [Essay on the post-Oligocene history of the Popigai impact morphostructure]. Meteoritika [Meteoritics], 1990, vol. 49, pp. 154-164. (in Russian).

Strelkov S. A. Sever Sibiri [North Siberia]. Moscow, Nauka Publ., 1965, 336 p. (in Russian).

Zamaraev S.M., Adamenko O.M., Ryazanov G.V., Kul'chickij A.A., Adamenko R.S., Vikent'eva N.M. Struktura i istoriya razvitiya Predbajkal'skogo predgornogo progiba [The structure and development history of the Pre-Baikal piedmont deflection]. Moscow, Nauka Publ., 1976, 135 p. (in Russian).

Ufimcev G.F. Malye vpadiny v Bajkalskoj riftovoj zone [Small hollows in the Baikal Rift Zone]. Geografiya i prirodnye resursy [Geography and Natural Resources]. 2013, no. 4, pp. 28-36. (in Russian).

Florensov N.A. Mezozojskie i kajnozojskie vpadiny Pribajkal'ya [Mesozoic and Cenozoic depressions of the Baikal region]. Moscow, Leningrad, Publishing House of the USSR Academy of Sciences, 1960, 258 p. (in Russian).

Florensov N.A. Ocherki strukturnoj geomorfologii [Essays on Structural Geomorphology]. Moscow, Nauka Publ., 1978, 238 p. (in Russian).

Saks V.N., Strelkov S.A. (eds.). Chetvertichnye otlozheniya Sovetskoj Arktiki [Quaternary deposits of the Soviet Arctic]. Moscow, Gosgeoltechizate Publ., 1959, 232 p. (in Russian).

Ekologicheski orientirovannoe planirovanie eemlepolzovaniya v Bajkalskom regione. Kovyktinskoe gazokondensatnoe mestorozhdenie [Ecologically oriented land use planning in the Baikal region. The Kovykta gas-condensate field]. Irkutsk, V.B. Sochava Institute of Geography SB RAS Publ., 2004, 159 p. (in Russian).