Global Ruin

• WWizards of the Coast2004-10-04
  Official Ruling
  If a land counts as multiple basic land types, you can choose it for either or for both of those land types.
• WWizards of the Coast2010-08-15
  Official Ruling
  You sacrifice all lands other than the chosen ones. Since you can only choose lands with basic land types, any non-basic lands that don’t have a basic land type (even if they have some other land type, as in the case of Cloudpost) are necessarily going to be sacrificed.

Rulings via Scryfall