Ores in granite
Part of Hall of Planet Earth.
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Part of Hall of Planet Earth.
Water leached the metal molybdenum out of hot granite and deposited it in cooler granite, in veins that can be seen to crisscross the rock. The blue-gray mineral is molybdenum sulfide. Four generations of veins are present, with successively younger ones cutting older ones.
Provided by Climax Molybdenum Company, Climax, Colorado