I have always wondered if so-called arrowheads were ethnic identifiers or if like cell phones, a point style was just the technology of the day and everyone used it. And color of the flint projectile points. I know archeologists that will heatedly reject that color could have cultural meaning. But there is a report from an excavation along the Bosque River (Mehalchick and Kibler) that has found that 2,000 year old Ensor points are consistently made from dark flint. Their competitors, the Godley point users, who also occupied the river, always selected pale gray for their dart points. Both colors were available at the lower Bosque River where they located their base camps. I don’t know how often this color identity based on flint occurred across Texas, but I did hear about the same color ID connection somewhere in Colorado.