Dark Rimless Pits in the Tharsis Region
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Dark Rimless Pits in the Tharsis Region

December 4, 2010
Two dark rimless pits are located to the Northwest of Ascraeus Mons. These pits are approximately 180 meters and 310 meters in diameter, respectively, and are situated in the midst of a large, wispy dark boomerang-shaped deposit.

These pits are aligned with what appears to be larger, degraded depressions. The wispy deposit may consist of dark material that has been either blown out of the pits or from some other source and scattered about by the local winds.

Careful study of the walls and floors of the pits as well as of the surrounding terrains will help unravel the complicated series of processes that must have been responsible for their formation and subsequent modification.

Written by: Ginny Gulick

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