bn:00070873n
Noun Concept
Categories: All Wikipedia articles written in American English, Industrial minerals, Shale
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shale  black shale  shale rock  shales
sedimentary rock
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EN
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite. Wikipedia
Fine-grained, clastic sedimentary rock Wikidata
A fine-grained sedimentary rock of a thin, laminated, and often friable, structure. Wiktionary
Sedimentary rock. Wiktionary (translation)
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