Geography and Natural Resources

, Volume 33, Issue 2, pp 131–135 | Cite as

Structure of river valleys on the Lena-Katanga Plateau

Regional Problems of Environmental Studies and Natural Resources Utilization
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Abstract

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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Copyright information

© Pleiades Publishing, Inc. 2012

Authors and Affiliations

  1. 1.Institute of Geography, Siberian BranchRussian Academy of SciencesIrkutskRussia

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