Sample Tharsis Tholus Caldera Wall
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Sample Tharsis Tholus Caldera Wall

March 22, 2007
This image captures one of the cleaner portions of the interior wall of the caldera at the top of Tharsis Tholus.

Tharsis Tholus is an intermediate sized shield volcano, much smaller than giants such as Olympus Mons, but still large by terrestrial standards. While relatively dust-free, this section of the caldera wall is still extensively covered by dust that is being sculpted into curious shapes by the wind and by gravity.

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