Abstract
ABSTRACTA trace element analysis by energy dispersive x-ray fluorescence (EDXRF) is provided for a newly discovered archaeological obsidian source in east-central Yuma County, Arizona. This Tertiary glass source is unique geochemically, but exhibits many of the attributes typical of Tertiary glass sources in the Sonoran Desert. Thus far, Tank Mountains material has been found in Archaic through Classic period Hohokam contexts as far east as the Phoenix Valley, although it appears to have not competed with the more extensive sources of Vulture and Sauceda Mountains.
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