NASA Mars Rover Finds Mineral Vein Deposited by Water”ScienceDaily (Dec. 7, 2011) — NASA’s Mars Exploration Rover Opportunity has found bright veins of a mineral, apparently gypsum, deposited by water. Analysis of the vein will help improve understanding of the history of wet environments on Mars.” 

NASA Mars Rover Finds Mineral Vein Deposited by Water

ScienceDaily (Dec. 7, 2011) — NASA’s Mars Exploration Rover Opportunity has found bright veins of a mineral, apparently gypsum, deposited by water. Analysis of the vein will help improve understanding of the history of wet environments on Mars.”