Based on the author's thesis, this study analyses a series of lithic assemblages from the region of Chas??en in eastern Languedoc. Vanessa L??a sets out the background context and methodology of her research before looking in detail at assemblages from eight sites. The evidence from these sites in finally compared and aspects of variability, geographical and chronological, social, functional and cultural implications are considered. French text.Based on the author's thesis, this study analyses a series of lithic assemblages from the region of Chas??en in eastern Languedoc. Vanessa L??a sets out the background context and methodology of her research before looking in detail at assemblages from eight sites.