PIA15098: Chemical Alteration by Water, Mawrth Vallis
Target Name: Mars
Is a satellite of: Sol (our sun)
Mission: Mars Reconnaissance Orbiter (MRO)
Spacecraft: Mars Reconnaissance Orbiter (MRO)
Instrument: HiRISE
Product Size: 860 x 647 pixels (width x height)
Produced By: University of Arizona/HiRise-LPL
Full-Res TIFF: PIA15098.tif (1.671 MB)
Full-Res JPEG: PIA15098.jpg (95.97 kB)

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Original Caption Released with Image:

Thick stacks of clay minerals indicate chemical alteration of thick stacks of rock by interaction with liquid water on ancient Mars. Aluminum clays overlying iron/magnesium clays here in the ancient terrains of Mawrth Vallis indicate a change in environmental conditions. Aluminum clays may form by near-surface leaching while iron/magnesium clays may form in the subsurface. The image is from the High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter. (References: Wray et al., 2008; Loizeau et al., 2010.)

Image Credit:
NASA/JPL-Caltech/Univ. of Arizona

Image Addition Date:
2011-11-21