Ed Twinning Clay PitPast Producer • Clay
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Central Coal Mine Shale ProspectProspect • Clay
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Mich Coal&Mining Co Shale ProspectProspect • Clay
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Winona Coal Co Shale ProspectProspect • Clay
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Consolidated No 3 Shale ProspectProspect • Clay
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Gage Shale&Clay ProspectProspect • Clay, Fire Clay (Refractory)
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AetnaProducer • Stone
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