Description:
<jats:p>Oxygen‐isotope and pollen analyses were carried out on late‐ and postglacial (Late Weichselian and Holo‐cene) sediment samples of the raised bog. The <jats:sup>18</jats:sup>O/<jats:sup>16</jats:sup>O‐ratio results provide the first unequivocal proof for the Eastern Alps of the climatic deterioration of the Younger Dryas period. High NAP‐values in the pollen diagram and a strong negative deviation in the oxygen‐isotope curve characterize this period. The earlier Gerzensee fluctuation is also indicated by small changes in the oxygen‐isotope curve. During the postglacial the Frosnitz climatic deterioration (6,000–6,500 B.P.) is evidenced as a fluctuation in the lake‐level. The oxygen‐isotope values indicate that the air temperature conditions remained unchanged at that time.</jats:p>