Remants of Mu

According to the Chumash Indians of California, Mu was the west coast of the Americas.   According to their legends, the west coast of Mu sunk into the Pacific Ocean (off Malibu, etc).  That leaves the rest of the Americas, and Aztecan/Atlantis as possibly one and the same continental mass that went "missing" as most of its coastal lands on either side have sunk into the sea, as well as some parts having suddenly risen several thousand feet.  The melting of the ice age glaciers also helped to drown the coastal areas that were left.

California is accurately depicted on the Waldseemueller map (1507) drawn before the first Europeans reached that coast.