Published online by Cambridge University Press: 18 December 2012
Our understanding of the history of ancient Chichen Itza has been advanced significantly in recent years by the Instituto Nacional de Antropología e Historia's Chichen Itza Archaeological Project. One important advance has been the definition of a new ceramic complex for the site of Yabnal, which dates to the Late Classic period, and corresponds to the Motul ceramic complex of Mayapan. The majority of materials used to define the Yabnal complex come from recent excavation of terraces and platforms distributed throughout the entire area occupied by Chichen Itza in its heyday, but also includes finds in association with the construction and use of buildings with rooms such as the substructure of the Temple of the Initial Series. The most important ceramic materials include complete and restorable vessels obtained from sealed contexts. The Yabnal ceramic complex displays a variety of local and imported wares, similar to those found elsewhere in the northern plains, with the Slate Ware group proving possibly the most important. Ceramic Slate Ware is a high-quality ceramic characterized by the frequent use of volcanic ash as temper, and demonstrates a deeply rooted tradition in northern Yucatan, spanning roughly 600 years. Although most recent discussion of ceramics at Chichen Itza has focused on the Terminal Classic and Postclassic periods, this study examines the early Yabnal ceramic complex of the Late Classic period with a focus on the site, its chronology, and the important implications this ceramic complex has for the general history of the northern plains.