[Errant]

There’s a possibility that would explain the formation! The age could be a fabrication. I’m guessing the thing might only be 40 - 50 years old.

[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