Since I was a young child Mars held a special fascination for me. It was so close and yet so faraway. I have never doubted that it once had advanced life and still has remnants of that life now. I am a dedicated member of the Mars Society,Norcal Mars Society National Space Society, Planetary Society, And the SETI Institute. I am a supporter of Explore Mars, Inc. I'm a great admirer of Elon Musk and SpaceX. I have a strong feeling that Space X will send a human to Mars first.
Dark Rimless Pits in the Tharsis Region (ESP_019997_1975)
Dark Rimless Pits in the Tharsis Region (ESP_019997_1975) Credit: NASA/JPL/University of Arizona
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.
Subimage (A)and(B)are close-ups of both pits. These images have been highly processed to reveal the surface details within each pit. The Eastern most and smaller of the two pits (A) contains boulders and sediment along its walls and brighter aeolian dune sediments on its floor. The larger, Western most pit (B) contains sediment and boulders with faint dune-like patterns visible on the deepest part of the floor. Both pits have steep Eastern walls and more gently sloped Western walls that transition gradually into the pit floor. Steep resistant ledges containing boulders that overhang and obscure the pit floors form the Eastern walls.
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
Original release: 1 December 2010
01 November 2010
Local Mars time:
Range to target site:
Original image scale range:
31.2cm/pixel (with 1 x 1 binning) so objects ~93cmacross are resolved