[winoneforthegipper]

While on a smaller scale you can see the process of gelifluction on these permafrost heaves.

http://en.wikipedia.org/wiki/File:Permafrost_stone-rings_hg.jpg

[Errant]

Yes, but the size of this one makes it hard to believe that could have been the process here? Then there should be similar others in the area.

[Graewoulf]

I vote with you. On the North Slope we called the bigger ones “Pingos.”