Chemical analysis by NASA’s Mars rover Curiosity indicates that water made several repeat appearances to create the rich mineral veins at a site called “Garden City” in the lower part of Mount Sharp. The veins form in places where fluids have move through fractured rocks, depositing minerals and leaving telltale chemical fingerprints on surrounding areas. Some of the mineral veins at Garden City protrude the equivalent of two finger widths above the now-eroded bedrock in which they formed.
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