Mexican Obsidian at Tikal, Guatemala

More than 1,200 artifacts from Tikal provide new information about the presence of Mexican obsidian in the Maya Lowlands and Teotihuacan"s possible role in its transmission. In addition to the source of green obsidian near Pachuca, six other Mexican sources were identified in the Tikal sample. These artifacts date from the early Late Preclassic into the Early Postclassic periods. Over 96 percent are prismatic blades and thin bifaces, whose recovery contexts, spatial distributions, and signs of use-wear indicate they were predominantly utilitarian and domestic artifacts used by all social groups. They were commodities that were transported over Highland-Lowland long-distance exchange networks of considerable time depth. This long-standing, interregional exchange of goods is essentially different from the relatively brief adoption and integration during the Early Classic period of objects, art styles, and behavior of Teotihuacan origin. Obsidian sequins and eccentrics of Teotihuacan style were material components of this latter phenomenon. Their forms and recovery contexts suggest use in rituals borrowed from Teotihuacan, but by lesser elites or wealthy commoners rather than by Tikal"s rulers.