Claim: Chaco Slope, noted for its Chacoan Anasazi ruins, borders the Chaco Core; which contains both Chacra Mesa (a high mesa massif composing the southwestern flank of Chaco Canyon) and Chaco Canyon.
Evidence: The Chaco Slope is a geographical region located in the northwestern portion of the U.S. state of New Mexico. The canyon itself is noted for its Chacoan Anasazi ruins. It borders the Chaco Core, which contains both Chacra Mesa and Chaco Canyon. The Chacra Mesa is a high mesa massif composing the southwestern flank of Chaco Canyon, a region that is notable for its rich collection of Ancestral Puebloan archaeological sites.