Ores in granite main content.

Ores in granite

Part of Hall of Planet Earth.

Ores in Granite AMNH/R.Mickens

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