MAKE A MEME View Large Image Butte Cross Section.PNG en Butte Cross Section 1990-01-01 USGS Bulletin 1857-E Gold in Porphyry Copper Systems Gold in the Butte District Montana Edwin W Tooker other versions PD-USGov Butte Montana Copper mines Copper mining Copper mining ...
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Keywords: Butte Cross Section.PNG en Butte Cross Section 1990-01-01 USGS Bulletin 1857-E Gold in Porphyry Copper Systems Gold in the Butte District Montana Edwin W Tooker other versions PD-USGov Butte Montana Copper mines Copper mining Copper mining in the United States Montana
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