[1] Univ Lumiere Lyon 2, CNRS, UMR 5600, EVS, F-69342 Lyon, France
[2] CNRS, UMR Chronoenvironm 6249, Besancon, France
[3] ENS Lyon, CNRS, UMR 5600, EVS, F-69342 Lyon, France
[4] Univ Lyon 2, Geog, 5 Av P Mendes France,CP11, F-69676 Bron, France
[5] CNRS, Environm Hist, 16 Route Gray, F-25030 Besancon, France
[6] ENS Lyon, Geog, 15 Parvis Rene Descartes,BP 7000, F-69342 Lyon 07, France