Obsidian trade was largely relegated to the coast with the collapse of Classic Maya society in the Northern and Southern Lowland regions that occupied the inland areas the Yucutan and River basins. The period from 900-1500 AD saw 80% of the population in the Yucutan remain within 50 km of the coast (Rathje and Sabloff 1973). Chichen Itza and Cozumel were used as trading bases by invaders in the Early Postclassic but after a mainland collapse the centralized commercial systems in place collapsed as well (Rathje and Sabloff 1973). For Postclassic Copan, an obsidian pattern similar to the Preclassic returned; nonspecialized production utilizing Ixtepeque obsidian used smaller flakes as opposed to polyhedral cores, resulting in fewer prismatic blades and an overall decline in the quantity and quality of utilitarian obsidian found at the site (Aoyama 2001). Obsidian network and cluster analysis shows weak integration in the Early Postclassic but overall greater integration focused on coastal trade nodes for the Late Postclassic Maya region with reformed connections between East and West, but the inland routes do not regain their former prominence (Golitko and Feinman 2015). Very little Central Mexican obsidian is found among Postclassic sites; much of it is believed to be recycled from earlier periods. The site of Colha in Belize utilized Ixtepeque in the Postclassic (Hester et al. 1980). The island site of Wild Cane Cay near Belize was an important port of trade for obsidian among the Postclassic Maya. Obsidian found at Wild Cane Cay is primarily from Highland Guatemala sources but there is some from Central Mexico, with an 80% increase in overall densities mainly in the form of cores during the Postclassic (Mckillop 1989). An estimated 21,686 cores overwhelmingly linked to production areas is recorded for the Postclassic at this site which far exceeds household needs (Mckillop 1989). This positions Wild Cane Cay as an important port of trade in the Postclassic exchange system of obsidian. Ambergis Key on the coast of Belize shows procurement of already reduced polyhedral cores primarily from Ixtepeque obsidian, but other Guatemalan sources are noted (Stemp et al. 2011). The arrival of the Spanish pushed the coastal Maya back inland, disrupting obsidian trade systems developed during the Postclassic which caused the use of recycled cored to rise (Stemp et al. 2011).