Tracing the acquisition of knapping skill in the Acheulian technocomplex is complicated by incomplete records of lithic production. Some studies have turned attention to examining knapping errors as a means of identifying signatures of toolmaking expertise in the deep past. Such insights have recently been applied to handaxes from the Area 1 spring eye at Amanzi Springs, which have suggested this locality functioned as a Large Cutting Tool workshop. Here we extend our analysis to handaxes from the Surfaces 2/3 (∼530–480 ka), Surface 1, and Cutting 5 (<480–408 ka) excavation areas within the Area 2 spring eye, which focuses on the development and frequency of step and hinge fractures and the management of cross-sectional shape. We identify differences in both the flaking strategies and the mitigation of knapping errors that demonstrate a gradual adaptation to local quartzite raw material and the acquisition of technological skill through time.
Funding
This research was funded by an Australian Research Council Discovery Project (DP170101139 and DP200100194) to AIRH, and a National Geographic Explorer grant to AIRH, MVC and AFB.