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New data to the Middle and Upper Pleistocene of the longest Danubian loess/paleosol sequence of modern Hungary

Sümegi Pál1, Gulyás Sándor1, Persaits Gergő1, Csökmei Bálint1
1 Department of Geology and Paleontology, University of Szeged

P 2.9 in Löss und terrestrische Archive

 

Predicting climate and environmental changes is one of the most significant challenges of current research in earth sciences. Long-term climatic changes at a resolution of several kys can be assessed by the careful investigation of various paleoarchives including terrestrial archives. Among terrestrial paleoarchives loess/paleosol sequences tend to be the most common and most prominent type of deposits of the Quaternary covering about 10-15% of the area of modern Hungary. A careful multiproxy analysis of loess/paleosol sequences yields us information about not only the fluctuations in past environmental components but a feedback of the local biota as well. Extensive loess sheets and loess plateus of several meters thickness accumulated in the Pannonian Basin, especially in its southern part, which present ideal archives of long-term macro and meso-scale fluctuations of the climate and environment for the Middle and Late Pleistocene. A recently published site of Udvari-2A located in the Tolna-Hegyhát (Tolna Hills) area of the Transdanubian Hills in SW Hungary is outstanding from this point as the borehole deepened in 1996 and originally described by Koloszár (1997) represents the thickest and probably most complete loess/paleosol sequence of Danubian loess from Hungary covering the past 1100 kys. According to the preliminary clay and carbonate mineral analysis of selected loess and paleosol samples by Földváry & Kovács-Pálffy (2002), the sequence seems to be less weathered than other LP sequences studied from nearby Danubian sites of Hungary. In order to assess the degree of weathering for different sedimentary components marking fluctuations in the temperature and humidity and to shed light onto the nature of the paleosols and pedogenesis identified on the basis of macroscopic lithological description of the profile detailed geophysical (MS), geochemical, phytolith and malacological analyses of selected loess-paleosol samples of the sequence was carried out. This paper presents the initial results of this work. Funding of grants TÁMOP-4.2.1/B-09/1/KONV-2010-0005 acknowledged.

 

Letzte Änderung 26.07.2012