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 (w x h)
 Produced By:  University of Arizona/HiRise-LPL
 Full-Res TIFF:  PIA15098.tif (1.671 MB)
 Full-Res JPEG:  PIA15098.jpg (95.97 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

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