Claim: The Chuska Valley is a geographical region first labelled by archaeologist Gwinn Vivian, that sits atop the Colorado Plateau in the Four Corners region of the desert Southwest.
Evidence: The Chuska Valley is a geographical region located in the northwestern portion of the U.S. These regions were first labelled by archaeologist Gwinn Vivian. Sitting atop the Colorado Plateau in the Four Corners region of the desert Southwest, it is near both Chacra Mesa and Chaco Canyon, which are noted for their Chacoan Anasazi ruins.