Board Thread:General Discussion/@comment-5349716-20130425180733/@comment-13446185-20140303051255

AngryEnclaveSoldier wrote: Well, Auriel shot Lorkhans Heart into the sea there some time after the Convenant, which means that it was almost always there. Solstheim, however, is just an Isle. I think there's a book in Dragonborn which says that Solstheim was originally part of Skyrim until it broke off. "So great and terrible were the forces unleashed in this contest that Solstheim was torn apart from the mainland of Skyrim."

-The Guardian and the Traitor