Péter Cseh
University of Szeged, Dept. of Geology and Paleontology, Graduate Student
- PhD student, University of Szegededit
Ever since its introduction, computed tomography has come a long way. No longer is it merely a method that is used in clinical diagnostics, but it is becoming more and more popular among palaeontologists because it can be used to analyse... more
Ever since its introduction, computed tomography has come a long way. No longer is it merely a method that is used in clinical diagnostics, but it is becoming more and more popular among palaeontologists because it can be used to analyse both external and internal structures of fossil remains, such as small insects, snail shells and plant remains. The present study describes non-destructive analyses of Late Cretaceous and early Holocene charophyte gyrogonites by using the micro-CT technique, from sample preparation (embedding, fixing) to visualisation and assessment of images obtained. In addition to this non-destructive examination, we wished to test whether or not computed tomography could be used to examine the gyrogonites. Our preliminary results have made it clear that the micro-CT technique is worth employing for further research. It has proved possible to visualise the samples in 3D, rotate them, and observe them from different directions. By using the appropriate parameters,...
Research Interests:
Research Interests:
In the present work, well radiocarbon-dated Quaternary malacological and palynological analyses were implemented on 4 cm samples deriving from one of the thickest and best developed last glacial sequences of Central Europe the Madaras... more
In the present work, well radiocarbon-dated Quaternary malacological and palynological analyses were implemented on 4 cm samples deriving from one of the thickest and best developed last glacial sequences of Central Europe the Madaras brickyard and the borehole of Kolon Lake in the southern part of Hungary. Using a combination of mollusc, anthracological, palynological and climatic proxies evidence preserved within loess, we demonstrate that long-term changes (e.g. the last 39,000 (28,000) years) in paleoclimatic dynamics on the northern edge of the Bácska-Titel loess plateau, on the southern part of the Great Hungarian Plain. These proxy data are reflected in the following ecological changes: a turnover from predominantly cold-tolerant mollusc fauna in a boreal type forest-steppe context under cold conditions during the last glacial then followed by a shift to a predominantly xerotheromphilous land snail fauna in a temperate forest-steppe context under a warm temperate climate in the early Holocene. Certain warm-adapted, Central and SSE European distribution mollusc species such as Caucasotachea vindobonensis and Granaria frumentum, were found to have been associated with temperate forest-steppe in both the Holocene record and the present-day ecosystem.
Research Interests:
Research Interests:
The loess-paleosol profile near the settlement of Pecel has a notable size among the loess-paleosol sequences of the Northern Carpathian territories. Therefore, comprehensive sedimentological examinations were performed to understand the... more
The loess-paleosol profile near the settlement of Pecel has a notable size among the loess-paleosol sequences of the Northern Carpathian territories. Therefore, comprehensive sedimentological examinations were performed to understand the profile and the information preserved in it. The past periodicity and intensity of winds were showed by particle composition studies (GSI, U-ratio). At least two source areas can be presumed based on geochemical indices (CIA, CIW, Rb/Sr, Zr/Rb). Based on the characteristics of the chemical composition of sulphide minerals (P, S, Pb, Ni, As sulphides), the lower 10 m of the profile was supposed to be transported from the NW direction (Buda Thermal Karst, Borzsony, Cserhat). Sufficient information is not yet available in order to determine the source area of the upper 10 m. By using the mentioned indexes, major developing and weathering horizons also could be identified.
Research Interests:
Mineralogical, geological and paleontological analyses of archaeological tools and features have started already in the 18th century. These sporadic investigations were followed by systematic geological analysis from the middle of the... more
Mineralogical, geological and paleontological analyses of archaeological tools and features have started already in the 18th century. These sporadic investigations were followed by systematic geological analysis from the middle of the 19th century. Following the proposals of Flóris Rómer archaeologist at this time in Hungary in
the 1860s, geoarchaeological research started at first by the analysis of obsidian stone tools and later by the analysis of kurgans. By the magnetic susceptibility and complex sedimentological analysis of Vesszős-halom (Pusztaszer/Ópusztaszer), we were able to separate three different phases of accumulation of the analysed kurgan. It was also possible to prove the formation of the bedrock and soils that cover the surface of kurgan
(Vesszős-halom – Vesszős Mound). Furthermore, the former environment of the kurgan could have been reconstructed by using the results of pollen and malacological analyses.
the 1860s, geoarchaeological research started at first by the analysis of obsidian stone tools and later by the analysis of kurgans. By the magnetic susceptibility and complex sedimentological analysis of Vesszős-halom (Pusztaszer/Ópusztaszer), we were able to separate three different phases of accumulation of the analysed kurgan. It was also possible to prove the formation of the bedrock and soils that cover the surface of kurgan
(Vesszős-halom – Vesszős Mound). Furthermore, the former environment of the kurgan could have been reconstructed by using the results of pollen and malacological analyses.