Archaeology of Teotihuacan, Mexico
In a quantitative and morphological classification, four types of projectile points were suggested by variables, length, weight, color, and the shape of the wing. In the plot made by length and weight, two major groups are clearly represented. The group of large projectile points (more than 45 mm long and 4 g weight) was subdivided into three types (A, B, and C) by the shape of the wing. Type A was defined as those with concave wing edges and protuberances at the side ends. Type B points have convex wing edges while type C points have smoothly bowed edges. The small points, referred to as type D, comprised another one group, since the form of the wings is irregular and their differences are minimal in many cases.
More than 1,267 projectile points have been recovered from graves found at the Feathered Serpent Pyramid. In addition, twenty-eight projectile points were discovered by the our project in front of the staircase of the Feathered Serpent Pyramid as caches or as grave offerings removed from their original contexts. The numbers of projectile points deposited in the looted graves (Graves 12 and 13) are unknown. However, fragments found in the disturbed layers of the graves and in the looters' tunnel indicate that both also had contained many projectile points. Grave 13 seems to have had more than 100 points, while Grave 12 contained, in the second burial context corresponding to the FSP, at least tens of projectile points. In both graves, types A and B were dominant.