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Comments on Gigapan: Soudan Banded Iron Formation

  2. The late Archean (older than 2.5 billion years old) Soudan Banded Iron Formation is part of the Ely Greenstone Belt in northern Minnesota. This glacially scoured outcrop occurs in Soudan State Park, site of the oldest iron mine in Minnesota, which operated from 1884 to 1962. The banding reflects differing concentrati...

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        0.08 Gigapixels
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        December 16, 2011
        Date Taken
        October 07, 2011
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