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Champion Mining Company : ウィキペディア英語版 | Champion Mining Company The Champion Mining Company was created in 1899 to manage the Champion Mine located in the heart of copper country in Painesdale, Michigan.〔http://www.miningartifacts.org/Michigan-Copper-Mines.html〕 The Champion Mine in Painesdale was closed in 1967. Although primarily a copper mine, the Champion Mine also contained prehnite and chalcocite deposits.〔http://www.mindat.org/loc-3850.html〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Champion Mining Company」の詳細全文を読む
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