High-resolution record of environmental changes and tephrochronological markers of the Last Glacial-Holocene transition at Lake Lautrey (Jura, France)

• Published in: Journal of quaternary science Vol. 19; no. 8; pp. 797 - 808
• Main Authors: Vanniere, Boris, Bossuet, Gilles, Walter-Simonnet, Anne-Veronique, Ruffaldi, Pascale, Adatte, Thierry, Rossy, Michel, Magny, Michel
• Format: Journal Article
• Language: English
• Published: 01.12.2004
• Subjects: Germany, Eifel; Europe, Jura Mts; France, Massif Central; France, Haut-Normandie, Puys; France; Germany
• ISSN: 0267-8179
• DOI: 10.1002/jqs.872

This paper presents the results of a multiproxy investigation including volume magnetic susceptibility (), mineral and pollen analyses of Late Glacial sediments from Lake Lautrey (Jura, France). Small-scale lithological variations have been identified with high stratigraphic resolution in order to establish lithostratigraphic correlations between cores. measurements, combined with mineralogical analyses, provide information on past sedimentary processes. This combined approach reflects major changes in terrestrial habitats and soil processes which may relate to the climatic events characterising the Late Glacial climatic warming and cooling phases. During warm intervals, the record indicates increased lake productivity via carbonate precipitation and decreased input of detrital material. In contrast, cooler intervals show reduced lake productivity, catchment area instability and increased detrital inputs. Several short interruptions in reforestation and in soil stabilisation can be identified and linked with abrupt colder events occurring through the Bolling. A general trend of warming is recorded from the coldest part of the Younger Dryas. Three tephra layers were also detected. The mineral composition analyses show that the upper tephra layer corresponds to the Laacher See eruption (Eifel, Germany) while the lower ones may relate to the volcanic activity of the Chaine des Puys (Massif Central, France) around 13000cal.yrBP. These two events, recognised for the first time outside the Massif Central region, may provide additional chronostratigraphic markers for the Late Glacial sedimentary records of the Jura mountains and northern Alps.