Академическое издательство «Гео»

Keywords: relief-forming exogenetic processes, sedimentation, pedogenesis, landscape-climate changes, Holocene, Late Glacial, Selenga Middle Mountains, Western Transbaikalia.



GEOGRAPHY AND NATURAL RESOURCES, 2016, № 6, p. 15-21

Exogenetic processes and pedogenesis evolution in the tugnui depression during Late Glacial and Holocene

Yu.V. RYZHOV1 and V.A. GOLUBTSOV2

1 Irkutsk Scientific Center SB RAS, 664033, Irkutsk, Lermontova str., 134, Russia,
ryv@irigs.irk.ru
2 V. B. Sochava Institute of Geography SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 1, Russia,
tea_88@inbox.ru

A comprehensive study of unconsolidated deposits in the Nikolsk section allowed to reconstruct exogenetic and pedogenesis processes developing within the Tugnui Depression (the Selenga Middle Mountains), with the sedimentary strata accumulation dynamics restored at different time intervals. The phases of erosion-accumulative and eolian processes activation have been established (12,9–11,7; 10,2–8,6; 2,1–1,8 cal ka BP), which permitted reconstructing chronology and specific features of the pedogenic stages. Soils indicating stabilization stages of the relief-forming processes are represented by chernozems. Concurrent stages of pedogenesis and sedimentation processes benefited the formation of light- and dark-humus stratozems due to gradual washout and inwash of material in the uppermost soil horizons persistently affected by pedogenesis.

Keywords: relief-forming exogenetic processes, sedimentation, pedogenesis, landscape-climate changes, Holocene, Late Glacial, Selenga Middle Mountains, Western Transbaikalia.

DOI: 10.21782/GiPR0206-1619-2016-6(15-21)

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