1 Geoarchaeological studies of the Geoarchaeological studies of the central French alluvial plain central French alluvial plain of the Upper Rhine of the Upper Rhine Schmitt L.(1) & Schmitt L.(1) & Bo Boës E.(2) E.(2) With With the collaboration of: the collaboration of: C. C. Tribolo Tribolo , M. , M. Beiner Beiner , Y. Thomas, D. Schwartz, S. , Y. Thomas, D. Schwartz, S. Goepp Goepp, A. , A. Gebhardt Gebhardt , J. , J. Argant Argant , M. , M. Munschy Munschy (1) (1) University University of Lyon, UMR 5600 CNRS (2) Institut National de Recherches en of Lyon, UMR 5600 CNRS (2) Institut National de Recherches en Arch Archéologie Pr ologie Préventive (Strasbourg) ventive (Strasbourg)