“…Given the extremely low levels of trace element concentrations and comparatively limited compositional variation in chert or flint (Luedtke, 1992;Gratuze, Blet-Lemarquand, & Barrandon, 2001), LA-ICP-MS is increasingly used as analytical technique for chemical characterization of lithic artifacts made of either lithic materials (e.g., Bressy, 2003;Moroni & Petrelli, 2005;Roll et al, 2005;Bressy & Floss, 2006;Evans et al, 2007Evans et al, , 2010Brandl et al, 2011Brandl et al, , 2014Pettitt, Rockman, & Chenery, 2012;Speer, 2014). LA-ICP-MS requires minimal sample preparation, and analyzes a wide range of trace elements with high sensitivity in a short amount of time (a few minutes per sample), thus allowing for a very high sample throughput (Speakman & Neff, 2005;Resano, García-Ruiz, & Vanhaecke, 2010;Neff, 2012). All LA-ICP-MS measurements were conducted using an Agilent 7500ce quadrupole ICP-MS unit housed at the Central Laboratory for Water, Minerals and Rocks, NAWI Graz (University of Graz and Graz University of Technology, Austria), with sample introduction via an ESI NWR-193 laser ablation system.…”