These pictures are by, and courtesy of
A sinkhole, where an underground ice wedge has melted. For scale, Vlady
is ~1.85m (6'3") tall. Why he wants to stand on ground that looks about
to collapse underfoot I don't know.....guess it must be a
hockey-playing, Russian Permafrost Researcher thing. Maybe that's why
there aren't many...
This picture doesn't do justice to just how DEEP sinkholes like
this are. Yes, that's solid ice under their feet.
I think this is a pic of part of Tanana Flats (south of FBX) where
permafrost has pretty much melted out...
Here's something pretty neat:
I think here the 'active layer' (id est, that which melts and
re-freezes every year) has slid clean off the underlying ice. Saturated
with water, and lying on a low-friction permafrost layer, it just let
.....and just folded up at the bottom of the slope. Wikkid.
There's a human being in this one for scale. The rolls of tundra-turf
are ~2m high.