“…The goal of this approach is to identify elemental features that discriminate geologic samples from one deposit from others to source the geological origin of the raw materials used to manufacture artifacts, often using multivariate statistics techniques of classification like discriminant analysis (DA; Moreau et al, 2019;O'Leary et al, 2017). For example, among the possible markers, rare-earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Sc and Y) have been shown to be particularly effective in discriminating different types of cherts and solving provenance issues (Elefanti et al, 2021;Finkel et al, 2019;Olofsson & Rodushkin, 2011;Ramacciotti et al, 2019a). Indeed, robust geochemical studies proved that different sedimentary environments distinguish chert through characteristic REE levels and fractionation (Murray, 1994) and they were used as provenance markers in studies carried out on a wide range of geoarchaeological materials (Aura Tortosa et al, 2020;Gallello et al, 2016;Lecuit et al, 2018;Ramacciotti et al, 2019bRamacciotti et al, , 2020.…”