[cripplecreek]

Many pictures here.

http://siberiantimes.com/science/casestudy/news/n0018-exclusive-new-pictures-inside-mystery-siberian-crater/

They look like sink holes but that doesn’t explain the piles of debris around the rims.

[GeronL]

almost as if something crashed there or exploded from below?

[Fungi]

Good observation: “the piles of debris around the rim.”

[icwhatudo]

[Sacajaweau]

Looks like it pulled surface material toward the hole and it accumulated as it sunk. In other words there was some cohesion at the surface... probably because the surface was frozen...

Bet these holes are a lot older than we think.

[texas booster]

From the comments section:

Here is one pretty critical detail that was not mentioned -

This last summer a expedition from the Scientific Center of Arctic Studies found methane concentrations of 9.6% at the bottom of the crater – 50,000 times the atmospheric average.

The possibility that methane released by melting permafrost produced the crater had been a favored hypothesis from its discovery in mid-July.

[Straight Vermonter]

They look like sink holes but that doesn’t explain the piles of debris around the rims.

I'm pretty convinced that it is a pingo.

[Carry_Okie]

They look like sink holes but that doesn’t explain the piles of debris around the rims.

If the material dropped into a fluid, yes, it does by mechanics similar to an implosion.

[Daffynition]

“The First Law of Holes”.....