Tag Archives: Yale Member

Presence of Acid-Producing Rocks at Proposed Penokee Mine Site Confirmed

July 5, 2013  By Joseph Skulan A potential major environmental hazard of the iron mine Gogebic Taconite (GTac) claims it intends to open in the Penokee Hills is acidic runoff caused by the oxidation of sulfide minerals in rocks disturbed by mining operations. Sulfide minerals in the form of pyrite (ferrous sulfide) are known to […]

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