Well there should be some evidence of this great AZTLAN civilization in Arizona, New Mexico, California and Texas. But outside of some Hopi cave dwellings and a European mission in the middle of San Antonio is now, there isn’t any.
Maybe they mean Atlantis?
There were a number of very interesting civilizations in the area, occupied, conquered or lost by a variety of peoples.
This is just a crock. I attribute it to Carrion’s dropping acid back in school, while contemplating a black velvet painting of an Aztec maiden sacrifice.