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Home » Microbial precipitates in old iron ore mines (central Bohemia) » A thin bed of calcareous and ferruginous greywacke, Ordovician in age, represents the presumed iron » A thin bed of calcareous and ferruginous greywacke, Ordovician in age, represents the presumed iron

A thin bed of calcareous and ferruginous greywacke, Ordovician in age, represents the presumed iron

A thin bed of calcareous and ferruginous greywacke, Ordovician in age, represents the presumed iron ore layer.

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