1 A subaquatic moraine complex in overdeepened Lake Thun 1 (Switzerland) unravelling the deglaciation history of the Aare 2 Glacier 3 4 5 S.C. Fabbri 1* , M.W. Buechi 2 , H. Horstmeyer 3 , M. Hilbe 2 , C. Hübscher 4 , C. Schmelzbach 3 , B. Weiss 4 , 6 F.S. Anselmetti 2 7 8 9 1 Institute of Geological Sciences, Baltzerstrasse 1+3, 3012 Bern, Switzerland 10 2 Institute of Geological Sciences, Oeschger Centre of Climate Change Research, University of Bern, 11 Baltzerstrasse 1+3, 3012 Bern, Switzerland 12 3 Institute of Geophysics, Dept. of Earth Sciences, Sonneggstr. 5, ETH Zürich, CH-8092, Zürich, 13 Switzerland 14 4 Institute of Geophysics, Center for Earth System Research and Sustainability, University of 15 Hamburg, Bundesstr. 55, D-20146 Hamburg, Germany 16 17 18 19 *Corresponding author 20 21 Keywords: Quaternary, Deglaciation, Western Europe, Aare Valley, Overdeepening, , Seismic 22 Stratigraphy, Subaquatic Moraine Complex, Gemorphology(glacial) 23 24