IRONSTONES (PETROGRAPHY)
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BTSEDIMENTARY ROCKS (PETROGRAPHY)
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UDC552.56
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Descriptor GEREISENGESTEINE (PETROGRAPHIE)
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Descriptor ENGIRONSTONES (PETROGRAPHY)
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Descriptor FREROCHES/FERRUGINEUSES (PÉTROGRAPHIE)
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NTMANGANESE CRUSTS (PETROGRAPHY)
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NTRED BEDS (PETROGRAPHY)
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NTRED CLAY, FERRIC OXIDE (PETROGRAPHY)