Answers are grounded in this paper and cite their sources.
When initially discovered in 2014, 21 Early Stone Age (ESA) pointed stone bifaces from the Uitspankraal 1 (UPK1) in western South Africa were left in the field but recorded for photogrammetry analysis. Digital models developed with these data made it possible to recognize that UPK1 handaxes were routinely produced with a process that emphasized outline rather than volumetric adjustment and usually involved only a single flip. The procedural uniformity of the assemblage is clear and rather easily accessible with the field-based photogrammetic technique.
No takes yet. Share an insight, caveat, or question.
Bleed et al. (2017) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: