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Mars Reconnaissance Orbiter - Dark Rimless Pits in the Tharsis Region
Posted on Saturday, March 3, 2012
Uploaded by
Waspie_Dwarf
Image credit: NASA/JPL-Caltech/University of Arizona
Uploader comment: Two dark, rimless pits are located to the northwest of Ascraeus Mons in the Tharsis volcanic region of Mars. These pits are approximately 180 meters (591 feet) and 310 meters (1,017 feet) in diameter.
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