SILICEOUS ROCKS (PETROGRAPHY)
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BTSEDIMENTARY ROCKS (PETROGRAPHY)
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UDC552.55
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Descriptor GERKIESELGESTEINE (PETROGRAPHIE)
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Descriptor ENGSILICEOUS ROCKS (PETROGRAPHY)
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Descriptor FREROCHES SILICEUSES (PÉTROGRAPHIE)
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NTFLINT + HORNSTONE + CHERT (PETROGRAPHY)
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NTSILICEOUS SEDIMENTS (PETROGRAPHY)
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NTSILICICLASTIC ROCKS AND SEDIMENTS (PETROGRAPHY)