Академическое издательство «Гео»

Keywords: formation of deposits, alluvium, weathering crust, Holocene, karst lakes, Lena-Katanga Plateau.



GEOGRAPHY AND NATURAL RESOURCES, 2012, № 2, p. 62-67

Structure of river valleys on the Lena-Katanga Plateau

S.A. Makarov and M.Yu. Opekunova

makarov@irigs.irk.ru, opek@mail.ru

Exploration data for different-order river crossings on the Lena-Katanga Plateau (northern Irkutsk oblast) were used to identify, according to the occurrence conditions of bedrocks, weathering crusts and alluvial deposits, three types of structure of river valley bottoms. In the geological evolution history of loose deposits in the valleys, six stages were determined, which occurred mostly during the Holocene. Karst lakes evolved into existence along tectonic fault lines in the river valleys at that time period which complicated their structure.

Keywords: formation of deposits, alluvium, weathering crust, Holocene, karst lakes, Lena-Katanga Plateau.
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