National audienceThis paper provides an overview of research on the alluviums of the Magdaleniansite of Etiolles (Essonne, France). The data has been collected over the40 years of excavation and research on the geological and natural contextsof the human occupation of the site. The importance of the alluviums residesin the date of the first deposits and the timescale of sedimentation. They alsoprovide an insight into the evolution of the Seine valley and its chronologicaland climatic contexts from the Late Glacial period to the beginning ofthe Holocene. The stratified sequence of the alluviums at Etoilles serves asreference for the study of the evolution of river valleys of the centre of theParis basin and the North-West of France notably f...