A provenance study of archaeological obsidian from the Andahuaylas region of southern Peru

► PXRF and LA-ICP-MS analysis of archaeological obsidian from Andahuaylas, Peru. ► Results reflect a long-term dependence on local (<150 km away) obsidian sources. ► Results indicate the long-term dependence on Potreropampa obsidian. ► Local populations in Andahuaylas procured very little, high quality, distant obsidian.