Alum, David Walton publishes his obsidian use-wear analyses
Alum, David Walton new article published online that presents his obsidian use-wear analyses from a site called Altica (1250-800 BC), Mexico, which is the earliest settlement documented for the Teotihuacan Valley. If you would like to check out the paper in full, you can do so through his faculty website (https://lssc.instructure.com/courses/7380/pages/home) tldr: they were doing A LOT of woodworking with very basic percussion tools, and they were probably able to do this because they lived quite close to an obsidian source https://doi.org/10.1017/S095653612000005X.
Congratulations David!