Does Size Matter? What the Projectile Points from Oregon’s Mill Creek Archaeological Complex Tell Us

A dramatic increase of small (“arrow-sized”) points, typically beginning after about 2,000 years ago (depending on locality), has often been characterized as marking the introduction of the bow and arrow throughout the Americas, eventually replacing earlier dart-and-atlatl weaponry in most areas. We analyze a large point assemblage from sites in the central Willamette Valley of western Oregon with a 6,000-year-long cultural record. We easily sorted the assemblage into small (“arrow-sized”) and large (“dart-sized”) sets using standard metrics, but we noted extreme temporal overlap, suggesting that (1) atlatls and bows continued in regular use as companion weapons; (2) both large and small projectile tips were affixed to arrows, depending on the target; or (3) there was some combination of these factors. Given the range of point forms, it appears that some served specialized functions (e.g., social conflict, hunting conditions, prey type), suggesting that the uses of stone-tipped weaponry may be more nuanced than has generally been acknowledged. Consequently, we find that assigning points to specific weapon systems requires assumptions we cannot support.