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Chronostratigraphy and geomagnetics on loess-paleo soil sequences in Hungary

Work on sediments from the last glacial period in Süttő (northern Hungary) and much later sequences in part in Beremend (southern Hungary).

According to Varga (2011), loess-paleo soil sequences (LPSS) in Hungary are influenced by local and regional geomorphological and climatic factors. Nevertheless, they can still be correlated reasonably well with global climatic changes. Three main formations are differentiated: Pliocene/ Early Pleistocene red soils (aeolian red clays); Early Pleistocene loess-paleo soil sequences; glacially and interglacially influenced loess deposits over the last 1 million years.   After the drying out of Lake Balaton, aeolian processes played a dominant role during sedimentation within the Pannonian Basin. More than 50 % of the basin is covered by loess-like sediments, and mostly underlain by red clays.   

Our work on LPSS samples in the vicinity of Süttő (northern Hungary) confirms the last ice age character of the sequences. We were not able to confirm short reversals of the earth's magnetic field such as the Mono Lake and Laschamp events. It was possible, however, to roughly correlate a plot of relative paleo intensities with the so-called GLOPIS 75 data set after Laj et al. (2004), and the PISO data set after Channell et al. (2009), and to therefore identify it as a last ice age LPSS. In addition, paleomagnetic investigations confirm that the classic "Chinese" model of magnetic enhancement with a rise in concentration-dependent geomagnetic parameters as a consequence of soil formation processes, also applies to the northern Carpathian Basin. The findings were presented at conferences and published (Rolf et al. 2014).

An almost 30 m thick loess-paleo soil profile is exposed in Beremend in south-western Hungary and can be subdivided into two units according to previous findings: a Late to Middle Pleistocene sequence and a much older probably Early Pleistocene loess-paleo soil sequence, although without any numerical aging so far. Work is currently being carried out on the chronostratigraphy and geomagnetics in close co-operation with Department 3 and colleagues from the University of Budapest.