The Chaco Wash is an arroyo (a periodic stream) cutting through Chaco Canyon, which is located in northwestern New Mexico on the Colorado Plateau.
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1832 pen and wash drawing by Sir Charles D'Oyly, 7th Baronet
The Menefee Shale is a geological stratum underlying the Chaco Wash, which is located in the northwestern portion of the U.S. state of New Mexico, in what is now Chaco Culture National Historical Park.