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Minesota Mine : ウィキペディア英語版 | Minesota Mine
The Minesota Mine is a former copper mine near Rockland, Ontonagon County in the Upper Peninsula of the U.S. state of Michigan. The Minesota (the single "n" in the name was a mistake in the original incorporation papers) was one of the most productive and famous early mines in the Michigan Copper Country. ==Geology== Like almost all other Copper Country mines, the mineral sought was native copper. Some silver was said to have been recovered in the upper workings. Other minerals in the ore, but which had no economic importance include quartz, calcite, epidote, pumpellyite, chlorite and feldspar.
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「Minesota Mine」の詳細全文を読む
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