Fig. 1.

Radiocarbon age determinations from Coxcatlan Cave, compared with the initial temporal placement of the samples based on cultural stratigraphic association. (A and B) Dates from excavation units on the west (A) and east (B) sides of the cave. The time spans of cultural phases are expressed in radiocarbon years in the lower bar and in calibrated calendar years in the upper bar (19). The time spans of cultural zones are shown in radiocarbon years, and the time span of cultural phases, in calibrated calendar years.