Environmental History of an Early Agricultural Period Irrigation Canals Network at Las Capas (Site AZ AA:12:753 [ASM]), Tucson, Arizona
The Santa Cruz Drainage Basin contains a rich record of prehistoric irrigation for at least 3200 years. Archaeologists and paleoecologists have identified the evolution of this agricultural technology from opportunistic to systematic canal operation. The present study documents the first detailed analysis of a networked canal system during the Early Agricultural Period (1200 BC – AD 50) using ostracodes, micro-mollusks, calcareous algae and the geochemical signatures of ostracode (Ilyocypris bradyi) valves that allowed us to generate an aridity index. The index resulted from the combined data of stable isotopes (18O and 13C), and trace elements (Mg/Ca, and Sr/Ca). The aridity index suggests the irrigation waters salinization trends at the time of canal operation.
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Environmental History of an Early Agricultural Period Irrigation Canals Network at Las Capas (Site AZ AA:12:753 [ASM]), Tucson, Arizona. Manuel Palacios-Fest, James Vint, Fred Nials, David Dettman, Dirk Baron. Presented at The 80th Annual Meeting of the Society for American Archaeology, San Francisco, California. 2015 ( tDAR id: 396951)
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min long: -115.532; min lat: 30.676 ; max long: -102.349; max lat: 42.033 ;