International audienceThe “Colombier” site at Chézy-sur-Marne site (Aisne, France) is located in the southern part of the Aisne department, on top of a slope overlooking the Marne valley. Known from ancient surface collections, the site was identified during an archaeological survey carried out in 2010. The planned constructions did not threaten the discovered site and during four research campaigns (carried out between 2011 and 2014) it was possible to investigate an area of nearly 70 m2 and to collect about 5,000 objects, many of which were associated with anthropic features. The site was covered by carbonate loess deposits dated to the Upper Pleniglacial, which were between 40 and 80 cm thick. The presence of several anthropic features t...