Proposed Canon
The presumed home of the non-capital Marbit forces, or at least a location they have mined at one time.
 Real World References
The name parodies the name of the "Misty Mountains" from J. R. R. Tolkien's The Hobbit and The Lord of the Rings. It may also be a reference to Andes Mints, a popular brand of mint-flavored chocolate candy named after the Andes mountain range.