Thanks for the mystery!
Russia abounds with some strange things....and this is right up there with them.......
I am thinking of course of the Bowls,the Detlov incident etc.....pretty wild stuff!
The Clay sides you said, showed no sign of erosion?
How far down did you get?
Was the bottom full of carcasses or detritus?
(any chance of seeing the actual bottom and examine for bit marks?
Does the hole go straight down? or curves at all? Feel free to U2U me.....
I hope youll post more soon its intriguing....dont mind the skeptics they are a dime a dozen here.....
Warmest regards ............s