Introducing an improved multi-proxy approach for paleoenvironmental reconstruction of loess–paleosol archives applied on the Late Pleistocene Nussloch sequence (SW Germany)

作者: M. Gocke , U. Hambach , E. Eckmeier , L. Schwark , L. Zöller

DOI: 10.1016/J.PALAEO.2014.06.006

关键词:

摘要: To study paleoenvironmental and paleoclimatic changes in loess-paleosol sequences (LPS), most proxies except for screening parameters have often been applied at low sampling density, typically 1-2 per stratigraphic unit. This might lead to results that overlook paleovegetation effects were not only restricted paleosols but also affected underlying loess material. Here, a new profile was investigated the sequence (LPS) Nussloch, SW Germany using high resolution multi-proxy approach improve our understanding of Late Pleistocene record which serves as standard Central Europe. included several geophysical geochemical parameters, well frequencies root-related features. Grain size distribution OSL dating enabled correlation section with nearby P4, revealing considerable variations thickness units due local small-scale depositional conditions paleogeomorphology longitudinal greda structures. Magnetic susceptibility revealed weathering entire LPS under more humid than those described SE European Chinese LPS. It further rough differentiation between an interval influenced by pedogenic processes (Lower Pleniglacial lower part Upper Pleniglacial), markedly soil formation. Color measurements confirmed these identification Pleniglacial. For uppermost LPS, magnetic inorganic such Fe/Ti ratios indicated weak or no influence. In contrast, e.g. carbonatic carbon contents organic carbon/nitrogen (C/N) ratio be related frequency calcified root remains (up 200 rhizoliths m(-2) up 12,500 microrhizoliths m(-2)) certain depth intervals entailing incorporation degradation matter. Frequencies biopores, are suggested derive largely from former growth and, lesser extent, insect earthworm bioturbation, paleosols, thus pedostratigraphy. An improved assessment terrestrial sedimentary archives can achieved high-resolution analysis three-dimensional investigation sediments prone bioturbation. (C) 2014 Elsevier B.V. All rights reserved.

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