Large Elongated Forms of Relief and their Relationship with the Tectonic Structure of the Northern Part of the Russian Plain
https://doi.org/10.31857/S0869607121020026
Abstract
This paper summarizes the results of studies of geomorphic and structural analyses of elongated forms of relief of the Northern part of the Russian Plain, based on digital elevation model (DEM) based on topographic maps of scale 1 : 100000 and various geological data. DEM have revealed 11 elongated forms in the topography of the region within the river basins of Northern Dvina, Mezen and Kuloi. The length of these ridges varies from 30 to 200 km, average relative height is 20–60 m and an average width is 1–4 km. It has been suggested that these elongated forms, previously described as “eskers”, “moraine” or “end-moraine ridges” are completely of tectonic origin with the effect of accumulation and abrasion during the periods of Quaternary marine transgressions and subsequent processes of erosion and denudation. The direction of Belomor-Mezen and Belomor-Dvina shear dislocation zones and faults control the orientation of these elongated forms. Intraplate tectonic events related to the vertical and horizontal mobility between crystalline basement and sedimentary cover across long-lived dislocation zones and faults had important implications for the formation of both the ridges in particular and present-day relief of flat areas in general. The data presented in this paper provide a foundation for future field studies of the ridges, as well as the factors controlling their formation.
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For citations:
Burlakov P.S. Large Elongated Forms of Relief and their Relationship with the Tectonic Structure of the Northern Part of the Russian Plain. Proceedings of the Russian Geographical Society. 2021;153(2):46-55. (In Russ.) https://doi.org/10.31857/S0869607121020026
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