This paper presents the results of a multiproxy investigation including
volume magnetic susceptibility (kappa), 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. kappa 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 13000 cal. yr BP. 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. Copyright
(C) 2004 John Wiley Sons, Ltd.