Stillwater Igneous Complex

USA / Montana / Greycliff /
 platinum mine/processing  Add category
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A layered mafic intrusive of PreCambrian age - some 2,700,000,000 years ago. The liquid rock cooled very slowly allowing Nickel and other metals to settle out in a very thin layer. The sulfides there have high levels of Platinum and Palladium.
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Coordinates:   45°27'19"N   109°55'49"W
This article was last modified 4 years ago