Experiments with replicas of Early Upper Paleolithic edge-ground stone axes and adzes provide criteria for identifying tool functions

Systematic tree-felling using a polished stone axe and/or adze developed with sedentary lifeways in Holocene environments. However, securely dated Pleistocene edge-ground stone axes/adzes have now been identified from Marine Isotope Stage 3 sites in two distant regions: Australia and Japan. These early ground tools are indicative of full-blown tree-felling, but whether they indeed functioned as woodworking tools remains unclear. We present the results of an experimental study with replicas of Early Upper Paleolithic edge-ground stone axes/adzes from the Japanese archipelago that included a total of 75 replicas used in 15 different use and nonuse experiments. Results indicate that identifications of wood percussive tools must be based on a comprehensive analysis of both macro- and microscopic traces. Overall, the criteria presented in this study allow us to distinguish between edge-ground stone axes/adzes used as tree-felling tools and those used for other tasks.