Archaeological Research Facility

The analysis here of 297 artifacts (292 obsidian, and a few not analyzed due to size) from three regions and a number of sites in the State of Sonora, Mexico indicates a very diverse provenance assemblage with known sources on both sides of the border, Chihuahua and Sonora, and a large proportion of, as yet, unlocated sources (58.2%) dominated by one source (44.2%) that is likely located somewhere along the Río Sonora or somewhere above that stream basin (see cover image and Figure 1). This is the largest, as yet, archaeological obsidian provenance study in Sonora, and despite the number of "unknown" sources provides a good basis for further archaeological and geoarchaeological research in Sonora.