ot meteoric, nor volcanic.
Truly wierd.
My theory is that it is probably exactly what it looks like.
There was some soert of event that happened underground that caused gasses to erupt to the surface pushing up a hill of rocks with it.
When it stopped, you got that crater.
Is this a recent formation? I can see a pic from 1971 but how long was this known before that?
It looks like it is new compared to the surroundung area.
Was it there before the Tanguska event?