[FormerLurker]

There IS a map that is considered to be authentic, and is 120 million years old..

Discovery of an Ancient 3D "Relief Map" of the Ural Region. Discovered in China!

[blam]

"There IS a map that is considered to be authentic, and is 120 million years old."

Authentic? Only that it was engraved in/on some very old rock. (When it was engraved has not been answered, IMO)