Projectile? Knife? Perforator? Using actualistic experiments to build models for identifying microscopic usewear traces on Dalton points from the Brand site, Arkansas, North America

At the end of the Pleistocene, Dalton hunter-gatherers substantially altered their technology by crafting points with serrated, beveled, and tapered blade margins. The functions of these attributes have been the focus of a long-held debate. Some archaeologists argue that the variation was the result of resharpening and use in varied tasks, like cutting—showing an adaptive shift to processing smaller game like deer. Other researchers suggest these new attributes were designed from the outset for the single functional use as projectiles. In this study, we use actualistic experiments to build analogues for interpreting microscopic usewear traces on an archaeological Dalton point assemblage from the Brand site, Arkansas. We then consider changes in point functionality within the broader context of the organization of Dalton lithic technology and how these changes reflect adaptations to the emerging Holocene environment.