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Mise en évidence d'évènements climatiques rapides par les faunes de mollusques terrestres des Loess Weichseliens de Nussloch (Allemagne)

Abstract : EVIDENCE OF RAPID CLIMATIC EVENTS BY THE TERRESTRIAL MOLLUSC FAUNA OF THE WEICHSELIAN LOESS FROM NUSSLOCH (GERMANY) A high resolution malacological study (1 sample for 10 cm) realised on the loess sequence of NuBloch (Germany) in the Rhine valley has yielded its first results. The aim of this work is the search of rapid variations of climate and/or environment in continental domain. Between 19 and 31 ky cal. BP, the sedimentological dilatation is exceptional (-10 m), and strong variations in both the di vers i ty index and the abundance are observed, and show that rapid global climate changes, at a millennial-time scale, occurred during this period. These variations are correlated with both the hthological changes and the grain size index, which characterises the aeo-han dynamics, determined in the same sequence. The variations of the proxies indicate that the deposition of each of the nine i denti fi ed gley-loess doublets is by three successive climatic changes. Thus, this indicate a great sensibility of loess environments to millennial climatic changes.
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Olivier Moine, Denis Didier Rousseau, Pierre Antoine, Christine Hatté. Mise en évidence d'évènements climatiques rapides par les faunes de mollusques terrestres des Loess Weichseliens de Nussloch (Allemagne). Quaternaire, Centre National de la Recherche Scientifique, 2002, 13 (3), pp.209-217. ⟨10.3406/quate.2002.1713⟩. ⟨hal-02496969⟩

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