Thundereggs from Russia

It is no surprise that Russia, and Siberia especially, has a wide range of thundereggs. It is on the same ring of fire as the western USA. However, they are far far less commonly seen than the American eggs, at least where I am. Partly at least, this is down to the difficulties with getting them out of the country, which can be positively surreal sometimes. However, as one explores more and more locations from Russia, a picture immerges of a very impressive and diverse world of thundereggs. The locations presented here, with what info I have on them, are presumably only a small hint of what's actually out there.