A New archaeological chronology for AZTEC-period Calixtlahuaca, Mexico

We describe the development of a new chronology for the Postclassic site of Calixtlahuaca, Toluca, Mexico. We identify three ceramic phases using discriminant analysis of decorated and plainware types. These phases are consistent with excavated stratigraphy, as well as a series of 54 radiocarbon dates. We then assign absolute dates to the phases using Bayesian analysis of radiocarbon dates and historical information on the date of site abandonment. The resulting chronology identifies three phases at the site: Dongu (A.D. 1130-1380), Ninupi (A.D. 1380-1450), and Yata (A.D. 1450-1530). We then discuss the local and regional implications of the chronology. More broadly, our results demonstrate the utility of using multiple, complementary methods for developing more precise chronologies.