The Nords on on that Island that begins with an S..I forgot the name uses Stahlrim kinda like a coffin for their dead.
Yes but that's where the skaal bury their people not all the nords in MW.
No, not the Skaal. Well, they might use it too, but most of the grave burrows are graves of other Nords, fighting in various wars in the region and it's surroundings.
From Bloodmoon Dialogue:
The Skaal consider the Stalhrim to be holy. During the great war with the Dark Elves, many heroes fell in battle. Some could not be returned to Skyrim, and were buried here. Great magicks were worked on their tombs to protect their belongings from grave robbers, and their corpses from worse things. Energy was drawn from the land itself, and our heroes were encased in tombs of ice. That ice is Stalhrim.- Graring.
The same thing is written in the http://www.imperial-library.info/zeph/tes_tre_3/s.shtml#s
Oh, and remember, Graring is not Skaal. He is an outcast, for he learnt how do make things out of Stalhrim. And probably because he used that knowledge, too.
We learned that Stalhrim can be forged much like iron or steel. We were made outcasts for it; the Skaal are too narrow-minded to understand its practical value.- Graring
It seems likely that they're returned to their homeland after they croak. Owyn makes a crack about how a Nordic Arena opponent will have to be "sent back to Skyrim in pieces" once I had dispatched with her. It could just be a figure of speech, but it seems to lend some credence to the corpse-deportation theory.
I don't know. Unless magically preserved, or the corpses wouldn't last. I don't know if there would be that many mages willing to travel across the nations with dead guys. Unless there's money in it, of course. Rich people, no doubt, could afford to send their dead back home, but poor people probably can't.
And then again, why would they? It's just a province.