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Imagery Captured:
February 15, 2007

(Read the full story) The upper-most layers of rock in many areas of Valles Marineris, Mars, have been stripped away by erosion, providing a glimpse of the subsurface that was once buried deep underground. Some fractures in these areas show evidence of fluid alteration, yielding clues into the ancient fluid chemistry and habitability of the subsurface. The image is approximately one kilometer across, and illumination is from the upper left. Image (c) Science