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    Radiocarbon Dating of Buried Holocene Soils in Siberia

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    Author
    Orlova, Lyubov A.
    Zykina, Valentina S.
    Issue Date
    2002-01-01
    Keywords
    Paleosols
    soil profiles
    paleoenvironment
    climate change
    reconstruction
    Holocene
    Siberia
    organic compounds
    peat
    sediments
    Asia
    Cenozoic
    charcoal
    Quaternary
    C 14
    carbon
    dates
    isotopes
    radioactive isotopes
    absolute age
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    Citation
    Orlova, L. A., & Zykina, V. S. (2002). Radiocarbon dating of buried Holocene soils in Siberia. Radiocarbon, 44(1), 113-122.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654595
    DOI
    10.1017/S0033822200064717
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    We have constructed a detailed chronological description of soil formation and its environments with data obtained on radiocarbon ages, palynology, and pedology of the Holocene buried soils in the forest steppe of western and central Siberia. We studied a number of Holocene sections, which were located in different geomorphic situations. Radiocarbon dating of materials from several soil horizons, including soil organic matter (SOM), wood, peat, charcoal, and carbonates, revealed three climatic periods and five stages of soil formation in the second part of the Holocene. 14C ages of approximately 6355 BP, 6020 BP, and 5930 BP showed that the longest and most active stage is associated with the Holocene Climatic Optimum, when dark-grey soils were formed in the forest environment. The conditions of birch forest steppe favored formation of chernozem and associated meadow-chernozem and meadow soils. Subboreal time includes two stages of soil formation corresponding to lake regressions, which were less intense than those of the Holocene Optimum. The soils of that time are chernozem, grassland-chernozem, and saline types, interbedded with thin peat layers 14C dated to around 4555 BP, 4240 BP and 3480 BP, and 3170 BP. Subatlantic time includes two poorly developed hydromorphic paleosols formed within inshore parts of lakes and chernozem-type automorphic paleosol. The older horizon was formed during approximately 2500-1770 BP, and the younger one during approximately 1640-400 BP. The buried soils of the Subatlantic time period also attest to short episodes of lake regression. The climate changes show an evident trend: in the second part of the Atlantic time period it was warmer and drier than at present, and in the Subboreal and Subatlantic time periods the climate was cool and humid.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200064717
    Scopus Count
    Collections
    Radiocarbon, Volume 44, Number 1 (2002)

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