TY - JOUR

T1 - Paleosols in the moraine-mantle loam sequence of northeastern Europe

T2 - The memory of pedogenesis rates and evolution of the environment during OIS3

AU - Rusakov, A. V.

AU - Korkka, M. A.

AU - Kerzum, P. P.

AU - Simakova, A. N.

N1 - Funding Information: This study was supported by Grant Agency of the Russian Foundation for Basic Research (Project No 05-04-49465).

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Morpho-analytical features of the paleocatena (a complexly organized heterochronous sequence), which contains 2 pedostratigraphical units: formed on the Holocene mantle loams Umbric Albeluvisol and the underlain Middle Valday (Wu{double acute}rmian) paleopedocomplex developed on Moscowian (Riss II) moraine deposits, are described. The buried pedocomplex consisted of: 1) the paleohumus and paleogley (2Atgb-2Gtb-3Atgb) and 2) paleohumus (3Atgb-3AtGb) horizons. Thus, these pedostratigraphic units reflect two studies of pedogenesis marked by two paleohumus horizons. The horizons of the paleopedocomplex are separate parts of the profile classified as the Umbric Gley soil formed during OIS3. The 14C age of the three paleosol horizons varied between 24,350-30,900 yr BP. The studied paleopedocomplex is the only one known containing the Middle-Valday paleosol formed on moraine deposits, which is a clear sign of the northernmost occurrence of the Bryansk fossil soil in Europe. A detailed hierarchical morphological study of the paleopedocomplex, including meso- and submicromorphological and magnetic susceptibility analyses, allowed us to identify the Late Quaternary pedogenic processes under severe extra-continental climate, including gleyzation, aggregation, cracking and humus formation. Good preservation of these individual pedogenic processes is shown to be a soil memory under the overlapping press of Holocene pedogenesis. It was shown that the clay coating in the Middle Valday of the pedocomplex is a part of the Holocene soil formation. Based on the palynological data, it is possible to subdivide the development of paleovegetation of the area into four stages during which the paleosol horizons had being formed. At the beginning and the final stage of the Middle Valday, the forest-tundra landscapes with inclusions of tundra-steppe associations predominated. During the optimum of Bryansk Interstade, the periglacial pine-birch formations were widespread.

AB - Morpho-analytical features of the paleocatena (a complexly organized heterochronous sequence), which contains 2 pedostratigraphical units: formed on the Holocene mantle loams Umbric Albeluvisol and the underlain Middle Valday (Wu{double acute}rmian) paleopedocomplex developed on Moscowian (Riss II) moraine deposits, are described. The buried pedocomplex consisted of: 1) the paleohumus and paleogley (2Atgb-2Gtb-3Atgb) and 2) paleohumus (3Atgb-3AtGb) horizons. Thus, these pedostratigraphic units reflect two studies of pedogenesis marked by two paleohumus horizons. The horizons of the paleopedocomplex are separate parts of the profile classified as the Umbric Gley soil formed during OIS3. The 14C age of the three paleosol horizons varied between 24,350-30,900 yr BP. The studied paleopedocomplex is the only one known containing the Middle-Valday paleosol formed on moraine deposits, which is a clear sign of the northernmost occurrence of the Bryansk fossil soil in Europe. A detailed hierarchical morphological study of the paleopedocomplex, including meso- and submicromorphological and magnetic susceptibility analyses, allowed us to identify the Late Quaternary pedogenic processes under severe extra-continental climate, including gleyzation, aggregation, cracking and humus formation. Good preservation of these individual pedogenic processes is shown to be a soil memory under the overlapping press of Holocene pedogenesis. It was shown that the clay coating in the Middle Valday of the pedocomplex is a part of the Holocene soil formation. Based on the palynological data, it is possible to subdivide the development of paleovegetation of the area into four stages during which the paleosol horizons had being formed. At the beginning and the final stage of the Middle Valday, the forest-tundra landscapes with inclusions of tundra-steppe associations predominated. During the optimum of Bryansk Interstade, the periglacial pine-birch formations were widespread.

KW - East-European Plain

KW - Evolution of the Environment

KW - Late Quaternary pedogenesis

KW - OIS3

KW - Paleosols

KW - The Bryansk fossil Soil

UR - http://www.scopus.com/inward/record.url?scp=34848816201&partnerID=8YFLogxK

U2 - 10.1016/j.catena.2007.03.023

DO - 10.1016/j.catena.2007.03.023

M3 - Article

VL - 71

SP - 456

EP - 466

JO - Catena

JF - Catena

SN - 0341-8162

IS - 3

ER -