Contact: Kevin Stacey
Caption: Mineral deposits mark subsurface water flow: A photo taken by the Mars Reconnaissance Orbiter shows ridges formed by fossilized subsurface water flow. Orientation of the ridges, mapped by researchers, is consistent with fractures formed by impact events.
Credit: NASA and Mustard Lab/Brown University
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Related news release: Fossilized conduits suggest water flowed beneath Martian surface