| 释义 |
hornstone
hornstone (ˈhɔːnˌstəʊn) n (Minerals) another name for chert, hornfels[C17: translation of German Hornstein; so called from its appearance]Thesaurus| Noun | 1. | hornstone - a fine-grained metamorphic rock formed by the action of heat on clay rockshornfelsmetamorphic rock - rock altered by pressure and heat |
Hornstone
hornstone[′hȯrn‚stōn] (petrology) chert Hornstone (hornstein), siliceous rocks (flints, jaspers, menilites) with admixtures of clay material and iron hydroxides; they form concretions and intercalations in carbonate and clay beds. Hornstones often contain carbonates and organic remnants, such as sponges and radiolarians. hornstone
Synonyms for hornstonenoun a fine-grained metamorphic rock formed by the action of heat on clay rocksSynonymsRelated Words |