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Found 40 datasets

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Concurrent and opposed environmental trends during the last climatic cycle between the Carpathian Basin and the Black Sea coast: evidence from high resolution enviromagnetic records from late glacial loess providing millennial environmental fluctuations

Aeolian dust sediments (loess) are beside marine/lacustrine sediments, speleothemes and arctic ice cores the key archives for the reconstruction of the Quaternary palaeoenvironment in the Eurasian continental mid-latitudes. The Eurasian loess-belt has its western end in the Middle (Carpathian) and the Lower Danube Basin where one can find true loess plateaus dating back more than one million years and comprising a semi-continuous record of Pleistocene environmental change. The loess-palaeosol sequences...
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OSL & pIRIR290 dating of the Stalac loess profile, Serbia

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Analysis of Migration Processes due to Environmental Conditions between 40,000 and 14,000 a BP in the Eastern Mediterranean and Balkan region, Luminescence Dating

Integrated within the collaborative research centre 806 “Our way to Europe” this presentation focuses on the “eastern trajectory” of modern human migration to Europe. This route links the region with the earliest fossils of Homo sapiens sapiens (so far known) in the Middle East, Anatolia, the Balkans and the Northwestern Black Sea. The research emphasis of this project lies on the exact timing of the environmental conditions. To gain an understanding of past environmental conditions and variations, a...
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Sedimentologische und geochemische Analysen des Sandlössprofils Doroshivtsi (West Urkaine)

The concerning sandy loess sequence, that extends to 9 meters, is situated on a slip-off slope of the Dnie-ster near Doroshivtsi in the south-west of the Ukraine. Since 2007, the section is investigated archaeolog-ically. This section is situated on the second terrace in the slope deposits. It is a remarkable sequence of seven consecutive achaeological layers, that are dated to the upper paleolithic. The area of the middle course of the Dniester was one of the most inhabited territories during the...
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Environmental change indicated by grain-size variations and trace elements: An example from the sandy-loess sediments from the Doroshivtsy site (Ukraine) Spatial

The recently discovered loess section of Doroshivtsy became famous due to archeological findings of the Gravettian. The profile represents a about 9 m sequence of sandy loess, intercalated by more humic horizons. It is situated in a flat gully and at an undercut slope of the Dniester River close to the village Doroshivtsy in the south-western Ukraine. Radiocarbon dating and luminescence ages are conclusive within the expected age range of the Gravettian period (22-28 ka). The loess section is composed...
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Influence of HCl pretreatment on laser diffraction measurements

Sample pretreatment methods in grain size (GS) analyses differ and their influence on GS distributions has been subject of controversial discussions. The standard sample preparation usually comprises the disaggregation into single primary particles. The organic binding material is oxidized by hydrogen peroxide (H2O2) and the containing carbonates are dissolved by hydrochloric acid (HCl). However, laser diffraction measurements of calcified sediment sequences or sediments with high contents of organic matter...
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Environmental change indicated by grain-size variations and trace elements: examples from two different sections - the sandy-loess sediments from the Doroshivtsy site (Ukraine) and the loess section Semlac (Romania) doi

Loess sequences provide important and at least a partial continuous record of Quaternary palaeoenvironmental change; some of the sequences even bury archaeological remains. In addition, loess-palaeosol sequences provide valuable information concerning environmental change and climate evolution. In this study, we compare two sections: (1) The Middle to Late Pleistocene loesspaleosol section of Semlac in western Romania (MIS 10 – 1), and (2) the sandy-loess section of Doroshivtsy in western Ukraine (MIS...
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Towards modelling of loess-paleosol sequence formation.

A simple modelling approach of loess-paleosol sequences combining both local insolation (as represented by a combination of precession and obliquity; p-0.5t) and a global climate signal (represented by the LR04 benthic oxygen isotope stack) is presented. Aim is the combination of these signals and the setting of threshold values to mimic loess-paleosol formation in the Pannonian Basin. As a good fit dies not necessarily imply a causal link, results require critical discussion.
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Environmental change indicated by a site-specific grain size ratio - the example of the Semlac loess-paleosol sequence (Romania)

Loess sequences provide important and at least a partial continuous record of Quaternary palaeoenvironmental change. In addition, loess-palaeosol sequences provide valuable information concerning environmental change and climate evolution. It is customary to reconstruct such changes by means of grain sizes ratios. In this study, we calculated an site-specific grain size (GS) ratio (Schulte et al. in review) and compare this ratio with the common U-ratio (Vandenberghe et al.1985) and, in addition, with...
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Climatological and environmental change as derived from physical and geochemical loess sediment properties: Examples of last glacial loess sites from the Pannonian Basin doi

The Project B1 within the CRC 806 “Our way to Europe” is focused on the "Eastern Trajectory" of modern human migration from Africa into Europe. The Middle East, Anatolia, Balkans and Southeastern Europe constitute the principal areas to be investigated. Within these larger regions key areas were selected for combined archaeological and geoarchaeological research, fieldwork having delivered case studies for initial Modern Human adaptational systems, yet to be fully...
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Environmental Conditions on the corridor of human migration between 40,000 and 14,000 a BP in Balkan region. A multi-proxy approach on loess-paleosol profiles doi

This contribution focuses on two PhD projects, which are integrated within the collaborative research centre 806 “Our way to Europe” at the University of Cologne and the RWTH Aachen University (Germany). The main research focus is the migration of anatomical modern human (AMH) to Europe. We concentrate on the paleoenvironmental conditions on the route through southeastern Europe. This links the region with the earliest fossils of Homo sapiens sapiens (so far known) in the Middle East, Anatolia, the...
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Investigation of the Azraq Basin, Jordan using Integrated Geoelectrical Techniques: 2D Modeling of Transient Electromagnetic Data

The Eastern Mediterranean has been the passageway for human migration from Africa to the Middle East, the Balkans and Europe. The Azraq basin in the eastern desert of Jordan has been a major spot for human settlements since the middle Pleistocene. The former lake in the basin center has developed to a 10 km × 10 km large hyper-saline alluvial mudflat, the Qa’ Al Azraq. In the basin center thick sequences of alluvial sediments, consisting mostly of clay and various evaporates, are deposited. We utilized the...
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