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Rocks Rich in Silica Present Puzzles For Mars Rover Team


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Marias Pass, Mars

This May 22, 2015, view from the Mast Camera (Mastcam) in NASA's Curiosity Mars rover shows the "Marias Pass" area where a lower and older geological unit of mudstonethe pale zone in the center of the imagelies in contact with an overlying geological unit of sandstone.

Credit: NASA/JPL-Caltech/MSSS

In detective stories, as the plot thickens, an unexpected clue often delivers more questions than answers.

From Jet Propulsion Laboratory/NASA
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