PALYNOSTRATIGRAPHIC ANALYSIS OF SEDIMENTS OF LATE PLEISTOCENE AGE FROM KOLLIKEN (SWISS PLATEAU)

In the area of the village Kolliken, which is situated southwest of Aa rau (Swiss plateau), several corings were carried out in order to prov ide information about the geology and hydrogeology of a hazardous wast e disposal site. Core KB 10 revealed three silty organic layers, which were studied by means of pollen analysis. The underlaying minerogenic layer consists of reworked lodgment till, the overlaying layer is a l oess-like loam. The pollen records revealed sequences of two interstad ials. The first interstadial (Kolliken I) is dominated by Picea and Pi nus, whereas Abies appears only in small amounts. From the second inte rstadial (Kolliken II) only the initial phase is recorded. This phase is characterized by the expansion of Betula and Pinus. The bio- and ch ronostratigraphic positions of both interstadials are discussed in det ail; they most probably belong to the Early Wurm.