“…Perdiz arrow points generally follow two manufacturing trajectories-one that enlists flakes, and the other, blade flakes [26,35,57,67]-and are known to encompass a greater range of variation in shape and size than most arrow point types in Texas [75,78]. Lithic tool stone in the ancestral Caddo area of northeast Texas is relatively sparse [67, Figure 2], consists primarily of chert, quartzite, and silicified wood characteristic of the local geological formations, which may contribute to local variation in shape and size [67,13].…”