TY - JOUR

T1 - Pedosedimentary environments in the Caspian Lowland during MIS5 (Srednaya Akhtuba reference section, Russia)

AU - Makeev, Alexander

AU - Lebedeva, Marina

AU - Kaganova, Alexandra

AU - Rusakov, Alexey

AU - Kust, Pavel

AU - Romanis, Tatiana

AU - Yanina, Tamara

AU - Kurbanov, Redzhep

N1 - Publisher Copyright: © 2021 Elsevier Ltd and INQUA Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/7/20

Y1 - 2021/7/20

N2 - Srednaya Akhtuba outcrop provides a detailed record of the Late Pleistocene continental and marine deposits and paleosols from MIS5 to MIS1. The MIS5 chronozone is presented by a continuous pedosedimentary sequence with three well-developed paleosols. The paper is based on the study of depositional environment and pedostratigraphy, with OSL chronological framework and precise altitude references. Field data are supported by chemical analyses, micromorphology, and clay mineralogy. A detailed study of MIS5 paleosols was first conducted for the Lower Volga area. Pedosedimentary sequence at that time developed on the river terrace in a backswamp and/or wetland influenced by extremely slow-moving stream after long seasonal floods. Thin loess layers were deposited during the brief episodes of low flood activity, while fluvial heavy loams – at the time of more intensive flooding. Mollic Gleysols and Fluvic Chernozems have been formed in the arid or semi-arid climate with seasonal freezing under productive wet meadows. Changes in the depositional environment resulted in the formation of welded paleosols, marked by textural difference, cryogenic levels, and accretionary humus horizons. Despite the complicated depositional pattern and the influence of seasonal floods, the MIS5 pedosedimentary sequence may serve as a good stratigraphic marker for the onset of Late Pleistocene allowing correlation with loess-paleosol sequences of the whole Ponto-Caspian region and linking it with the global stratigraphic schemes.

AB - Srednaya Akhtuba outcrop provides a detailed record of the Late Pleistocene continental and marine deposits and paleosols from MIS5 to MIS1. The MIS5 chronozone is presented by a continuous pedosedimentary sequence with three well-developed paleosols. The paper is based on the study of depositional environment and pedostratigraphy, with OSL chronological framework and precise altitude references. Field data are supported by chemical analyses, micromorphology, and clay mineralogy. A detailed study of MIS5 paleosols was first conducted for the Lower Volga area. Pedosedimentary sequence at that time developed on the river terrace in a backswamp and/or wetland influenced by extremely slow-moving stream after long seasonal floods. Thin loess layers were deposited during the brief episodes of low flood activity, while fluvial heavy loams – at the time of more intensive flooding. Mollic Gleysols and Fluvic Chernozems have been formed in the arid or semi-arid climate with seasonal freezing under productive wet meadows. Changes in the depositional environment resulted in the formation of welded paleosols, marked by textural difference, cryogenic levels, and accretionary humus horizons. Despite the complicated depositional pattern and the influence of seasonal floods, the MIS5 pedosedimentary sequence may serve as a good stratigraphic marker for the onset of Late Pleistocene allowing correlation with loess-paleosol sequences of the whole Ponto-Caspian region and linking it with the global stratigraphic schemes.

KW - Lower Volga area

KW - Paleolandscape reconstruction

KW - Triple paleosols

KW - Vertic pedofeatures

KW - EVENTS

KW - EAST EUROPEAN PLAIN

KW - CLIMATE-CHANGE

KW - SUCCESSIONS

KW - VERTISOLS

KW - SEA

KW - SEQUENCE

KW - KHVALYNIAN TRANSGRESSIONS

KW - MIDDLE

KW - PLEISTOCENE LOESS-PALEOSOL

UR - http://www.scopus.com/inward/record.url?scp=85103274452&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f55fe06b-edc0-3652-a698-3561e64332b9/

U2 - 10.1016/j.quaint.2021.03.015

DO - 10.1016/j.quaint.2021.03.015

M3 - Article

AN - SCOPUS:85103274452

VL - 590

SP - 164

EP - 180

JO - Quaternary International

JF - Quaternary International

SN - 1040-6182

ER -