Ants as Archaeologists: Materials recovered from thirty-eight anthills in ground alpha include: in the top row, travertine beads, nuggets of turquoise (un-worked and unbroken), black stone beads, and broken turquoise beads. In the center are catlinite beads and turquoise beads. The bottom row consists of un-worked fragments of turquoise, broken travertine beads, and flat pieces of turquoise, that are worked on one or more surfaces.
Although more than half of the 589 arrowheads in our San Lazaro collection were made from obsidian, many other types of stone also were used including alibates jasper, Pedernal agate, Edwards Plateau chert, phosphoria, petrified wood, flattop chert, basalt, siltstone and different kinds of chalcedony.
Occasionally a point is uncovered by our trowels, but the vast majority is found lying on the ground after a rain or a wind storm. Although the small arrowheads are often called “bird points,” they also were used to kill large animals such as buffalo and elk.