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Hammered Out Bits: Diggin' in the Dirt 2 - Primary Bog Iron Ore
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Bog Iron: Iron ore
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Bog iron - Wikipedia
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Hurstwic: Iron Production in the Viking Age
Soil profile with bog iron ore horizon (Bsm). Three different ...
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Bog Iron: Iron ore
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Iron Bog near Rochford, SD
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Hurstwic: Iron Production in the Viking Age
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Bog iron - Wikipedia
