TY - JOUR

T1 - Late Pleistocene paleosols in the extra-glacial regions of Northwestern Eurasia

T2 - Pedogenesis, post-pedogenic transformation, paleoenvironmental inferences

AU - Rusakov, Alexey

AU - Sedov, Sergey

AU - Sheinkman, Vladimir

AU - Dobrynin, Dmitriy

AU - Zinovyev, Evgeniy

AU - Trofimova, Svetlana

AU - Maksimov, Fedor

AU - Kuznetsov, Vladislav

AU - Korkka, Maria

AU - Levchenko, Snezana

PY - 2019/1/15

Y1 - 2019/1/15

N2 - Recent revision of the eastern boundary of the last glaciation of Eurasia opened new perspectives in the search of the paleopedological records in the north of Eastern Europe and Western Siberia. We studied paleosol-sedimentary sequences in the Upper Volga and Middle Ob basins as a regional paleoecological record for the Late Pleistocene thermochrons. Two key sections Cheremoshnik and Belaya Gora containing MIS3 and MIS5 paleosol units and additional section Koskovo 2 with polycyclic MIS3 paleosol were investigated. Their timescale are based on C14 and U/Th datings as well as on stratigraphic and paleobotanical correlations. Macro-, meso- and micromorphological observations together with fossil insects and plant macrofossil were used as paleoenvironment proxy. MIS3 paleosols show abundant redoximorphic and cryogenic features that allow interpreting them as gleyic Cryosols. Sub-fossil insects and plant macrofossil reflect the cold climate conditions. Three incipient Ah horizons in Koskovo 2 pedocomplex point to multiple phases of pedogenesis, correlative to the MIS3 paleosol levels in different sections of the Eurasian loess belt and to the major interstadials of the Middle Pleniglacial of the NW Europe MIS5 paleosols are also characterized by gleyzation and peat accumulation, in this case we suppose geomorphological control on hydromorphic pedogenesis; however paleosol in Belaya Gora has clear signs of polygenesis including the phase of clay illuviation. Insect and plant remains from the lower paleosol level of the Belaya Gora section show the transition from cold (terminal phase of MIS6) to warm first, and then to a moderately cold climate (within MIS5). The obtained results contribute to understanding of soil and landscape zonality in the largest plains of Eurasia mostly during the warm phases of Late Pleistocene.

AB - Recent revision of the eastern boundary of the last glaciation of Eurasia opened new perspectives in the search of the paleopedological records in the north of Eastern Europe and Western Siberia. We studied paleosol-sedimentary sequences in the Upper Volga and Middle Ob basins as a regional paleoecological record for the Late Pleistocene thermochrons. Two key sections Cheremoshnik and Belaya Gora containing MIS3 and MIS5 paleosol units and additional section Koskovo 2 with polycyclic MIS3 paleosol were investigated. Their timescale are based on C14 and U/Th datings as well as on stratigraphic and paleobotanical correlations. Macro-, meso- and micromorphological observations together with fossil insects and plant macrofossil were used as paleoenvironment proxy. MIS3 paleosols show abundant redoximorphic and cryogenic features that allow interpreting them as gleyic Cryosols. Sub-fossil insects and plant macrofossil reflect the cold climate conditions. Three incipient Ah horizons in Koskovo 2 pedocomplex point to multiple phases of pedogenesis, correlative to the MIS3 paleosol levels in different sections of the Eurasian loess belt and to the major interstadials of the Middle Pleniglacial of the NW Europe MIS5 paleosols are also characterized by gleyzation and peat accumulation, in this case we suppose geomorphological control on hydromorphic pedogenesis; however paleosol in Belaya Gora has clear signs of polygenesis including the phase of clay illuviation. Insect and plant remains from the lower paleosol level of the Belaya Gora section show the transition from cold (terminal phase of MIS6) to warm first, and then to a moderately cold climate (within MIS5). The obtained results contribute to understanding of soil and landscape zonality in the largest plains of Eurasia mostly during the warm phases of Late Pleistocene.

KW - 230Th/U dates

KW - Chronostratigraphy

KW - European and Siberian sedimentary sequences

KW - Late Quaternary pedogenesis

KW - MIS5–MIS1

KW - Paleocarpology

KW - Sub-fossil insect faunas

KW - Vegetation reconstruction

KW - ICE-SHEET

KW - LANDSCAPE EVOLUTION

KW - WEST SIBERIA

KW - EASTERN-EUROPE

KW - ENVIRONMENT

KW - PERIGLACIAL ZONE

KW - INTERGLACIAL PEAT

KW - sequences

KW - LOESS

KW - CENTRAL-ASIA

KW - MIS5-MIS1

KW - RUSSIAN PLAIN

KW - European and Siberian sedimentary

UR - http://www.scopus.com/inward/record.url?scp=85061636937&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/late-pleistocene-paleosols-extraglacial-regions-northwestern-eurasia-pedogenesis-postpedogenic-trans

U2 - 10.1016/j.quaint.2018.03.020

DO - 10.1016/j.quaint.2018.03.020

M3 - Article

AN - SCOPUS:85061636937

VL - 501

SP - 174

EP - 192

JO - Quaternary International

JF - Quaternary International

SN - 1040-6182

IS - Part A

ER -