B. Papp szerk.: Studia Botanica Hungarica 36. 2005 (Budapest, 2005)

Medzihradszky, Zsófia: Holocene vegetation history and human activity in the Kis-Balaton area, Western Hungary

channel. The area is covered with 30-50 cm water. Although the settlement history of the area is characterised by the archaeological localities south of the crossing point at Balatonhídvég, the source of pollen precipitation could be originated from a larger area, because of the openness of the basin from north and because of the direction of the prevailing wind. Some pollen transport by water flow is also possible. Preliminary and somewhat simplified results were published earlier (MEDZIHRADSZKY 2001Z?, SZÁNTÓ and MEDZIHRADSZKY 2004). Radiocarbon data The upper 230 cm of the sediment contained enough organic material for radiocarbon dating. From this profile 12 measures were made, the sample deb-7720 has shown reversed data, maybe because of pollution. For the dating of the part of the profile below 230 cm we used extrapolation based on previously acquired data and the similarity of the pollen curve of Keszthely-Usztatómajor (Table 3). Fig. 6. First principal component (a) and rarefaction analysis (b) of the Holocene sequence of Keszthely-Usztatómajor.