Nouns | |||||||
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| hard rock - a term used loosely for igneous or metamorphic rock, as distinguished from sedimentary rock, A rock that is relatively resistant to erosion, Rock that requires drilling and blasting for its economical removal, A term used loosely by drillers for a pre Cretaceous sedimentary rock that is drilled relatively slowly and that produces samples usually readily identified as to depth interval [GEOL.] | der Hartstein pl.: die Hartsteine | ||||||
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Orthographically similar words | |
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| Harnstein | |
Related search terms | |
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| Hartgestein, Festgestein | |
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