Low-altitude photo of palsa-like features
This low-altitude (<200 m) photograph of palsa-like or pingo-like features is similar to those described under image 0108 on the Maguse River Delta. Note the large (0.5 to 1 m diameter) boulders near the centers of two of the mounds, a circumstance noted on several of the features. Perhaps the boulders have some role in localizing the mounds, but other boulders scattered about the landscape are not associated with mounds. The vegetation-free areas among the mounds are flooded seasonally with water, which I believe is fresh and not tidal, although the surface of this area is very near mean high tide level for Hudson Bay. See also images 0048, 0049, 0108, 0109, 0131, 0243, 0245, and 0246.
Updated 04/09/2010 AW