SAS Webinar
Saturday, January 30, 2021
2:00 p.m.
Projectile point enlargement in the High Andean Archaic: an experimental atlatl study
by Caleb Chen

Archaic projectile points from the Andean Altiplano exhibit a curious trend of increasing size over time in contrast to a size reduction commonly observed throughout North America. We hypothesized that the increase compensated for decreasing dart momentum or accuracy resulting from shortening of atlatl parts as wood became increasingly scarce. Counter to expectation, our atlatl ballistic trials show that point enlargement significantly reduces penetration depth. However, we are unable to refute the accuracy hypothesis, leading us to suggest that Archaic point enlargement may have compensated for accuracy losses due to resource depletion on the Altiplano.

Caleb Chen is a graduate student at University of California Davis. He participated in the first U.C. Davis field school in the Andean Altiplano, Peru in 2019 and worked in the Forage Complexity Lab at U.C. Davis to replicated and experiment with an alpaca bone atlatl and atlatl darts to
assess projectile point trends in the Andes Mountains. Caleb also received a scholarship from Sacramento Archeological Society, Inc. in 2020.