Late Glacial stable isotope record, radiocarbon stratigraphy, pollen and mollusc analyses from the Geiseltal area, Central Germany |
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| Authors: | TATJANA BÖTTGER ACHlM HILLER FRANK WOLFGANG JUNGE THOMAS LITT DIETRICH MANIA NORBERT SCHEELE |
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| Institution: | UfZ-Umweltforschungszenlrum Leipzig-Halle GmbH, Sektion Hydrogeologie, Arbeitsgruppe Paläoklimatologie, Permoserstr. 15, D-04318 Leipzig, Germany;Institut für Geophysik und Geologic, Universität Leipzig, Talstr. 35, D-04103 Leipzig, Germany;Paläontol-ogisclws Institut, Universität Bonn, Nussallee 8, D-53115 Bonn, Germany;Forschungsstelle Bilzingsleben, Friedrich-Schiller-Universität Jena, Löbdergraben 24a, D-07745 Jena, Germany;Alfred-Wegener-Institut für Polar- und Meeresforschung, P.O. Box 12 01 61, 0–27515 Bremerhaven. Germmany |
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| Abstract: | Combined investigations of isotopes, pollen, and molliisc shells were carried out on a Latc Glacial limnic high-resolution sediment sequence from the Geiseltal open-cast mine in Central Gcrmany. The dala confirm thc division of the Late Glacial biozones into two colder (Older and Younger Dryas) and two warmer periods (Bølling, Allcrød), which have already bccn cstablishcd lor the Central and Northern German area. Radiocarbon data, mainly based on wood material, cover a time span between c , 10 800 BP and 12 760 BP, indicating a mean sedimentation rate of c . 2 mm/yr. The stable isotope data (δ18O, δ13C) reflect the transition periods between the climatic phases as changes in relative air humidity (transition from dry, cold to warmer. more humid conditions). The dominance of evaporation effects, however, is superimposed on any ternpcratiirc aignal throughout the profile. Repeated conversions of the hydrologic regime (silting-up phases. lake-level variations) characterize the specific history of the lake development. |
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