"Tip of the Tongue": Experimental Reconstruction of Handaxes at the Baise Basin (South China) and Implications for Lithic Standardization

Geometric morphometric studies in the Baise Basin in South China have documented unique tongue-like tip morphologies in handaxes sampled from the fourth terrace of the Youjiang River Valley. With this study, we report on a new handaxe assemblage found at the Natang site and present data that further document the prevalence of these rounded tip morphologies in the region. We use experimental replications to recreate the unique morphology of the handaxes, and demonstrate that a specific tip rounding strategy was employed by hominins as an economic and effective way to produce wider, more rounded and thinner distal tips. We suggest that these tongue-like tips indicate a predetermined design, and consequently, reflect a level of shape standardization that is heightened in functional tool portions. Moreover, this study provides further documentation of the regionally unique tool-making preferences that Pleistocene hominins employed when flexibly adapting to local environmental conditions and resource availabilities.