File:Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.69 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 28 (18603285114).jpg - Wikimedia Commons
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File:Soudan Underground Mine SP IMG 1042 soudan red quartz grey iron.JPG - Wikimedia Commons
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Jaspilite banded iron formation (Soudan Iron-Formation, Ne… | Flickr
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Banded Iron Formations BIF - Geology In
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Underground Iron Mine Image & Photo (Free Trial) | Bigstock
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