Claim: Chaco Slope, noted for its Chacoan Anasazi ruins and first labelled by archaeologist Gwinn Vivian, borders the Chaco Core; which contains both Chacra Mesa and Chaco Canyon.
Evidence: The canyon itself is noted for its Chacoan Anasazi ruins. These regions were first labelled by archaeologist Gwinn Vivian. It borders the Chaco Core, which contains both Chacra Mesa and Chaco Canyon.