A melting pingo in an area of continuous permafrost, NWT, Canada. The dome is much lower than it was, but there is still an ice core present. As the pingo dome subsides, other patterned ground processes have taken over, allowing the polygonal pattern of the surrounding terrain to extend across the pingo as well.
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Oblique aerial shots of Norfolk "pingo landscape" -- some of them have flooded or boggy centres, and others don't.....
2 comments:
For the Blaenporth pingos look at 52.0995, -4.5178 on Google Earth.
The area around that point and to the south west is full of long meandering ridges with badly drained depressions. They are linear and curving with circular and oval formations. There seems to be a correlation with the tributaries of the Hirwaun stream as they seem to run along the edges of the valleys.
Looking at them now, it may be that these are esker type formations, Brian may have a better opinion. They have been studied and described as pingos in the literature.
Dave
Thanks for the heads-up on this, Dave! I tracked those features down on "Where's the Path" -- very interesting -- they look very similar to the features in the B/W image reproduced above. Will investigate further.....
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