Age, origin and significance of a new middle MIS 3 tephra horizon identified within a long-core sequence from Les Echets, France.

• Published in: Boreas
• Main Authors: Veres, Daniel, Davies, Siwan M., Wohlfarth, Barbara, Preusser, Frank, Wastegard, Stefan, Ampel, Linda, Hormes, Anne, Possnert, Gören, Raynal, Jean-Paul, Vernet, Gérard
• Other Authors: Department of Physical Geography and Quaternary Geology, Stockholm University, School of the Environment and Society, Singleton Park, Swansea SA2 8PP, Wales, UK;, Department of Geology and Geochemistry Stockholm, Institut für Geologie Bern, Universität Bern Bern, Quaternary Geology, The University Centre in Svalbard (UNIS), Angström Laboratory, Uppsala University, De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie (PACEA), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Géographie Physique et Environnementale (GEOLAB), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Université Clermont Auvergne (UCA)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2008
• Subjects: MIS 3; tephra bed; basanite; geo; archeo; Dansgaard-Oeschger events
• Online Access: https://doi.org/10.1111/j.1502-3885.2008.00028.x; https://halshs.archives-ouvertes.fr/halshs-00442639

International audience A new tephra has been identified within a long core (EC 3) sequence recovered from Les Echets, near Lyon, France. This visible tephra was discovered as part of a high resolution multiproxy re-investigation of the Les Echets sequence. Independent chronological information suggests that the tephra is c. 42 000-45 000 years old, and geochemical analysis indicates that it is of basanitic composition. The latter suggests a possible origin in the Eifel; however, as yet, no other volcanic events or deposits can be correlated to the Les Echets tephra. New sedimentological and chronological data are presented indicating that the tephra falls within an interval that most likely correlates with Dansgaard-Oeschger events 12-9. Thus, this tephra could potentially be an important middle MIS 3 marker horizon in central Europe if it can be traced in other palaeorecords.