THEMIS: Frost-free dunes in the north polar sand sea

Polar dunes THEMIS_IOTD_20180525)THEMIS Image of the Day, May 25, 2018. This VIS image shows part of Olympia Undae, a large dune field that surrounds part of the north polar cap. At the top of the image the dunes are small and isolated.

As the amount of available sand increases the density of dunes increases. This is seen at the bottom of the image. Collected during northern summer, the dunes are completely free of ice and frost.

More THEMIS Images of the Day by geological topic.

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