单词 | pyroschist |
释义 | > as lemmaspyroschist pyroschist n. Brit. , U.S. Geology (now rare) a schist or shale with a high carbon content, which burns or yields volatile hydrocarbons or flammable gas when heated.ΚΠ 1861 T. S. Hunt in Canad. Naturalist & Geologist 6 242 These inflammable or lignitic shales, which may be conveniently distinguished by the name of pyroschists, (the brandschiefer of the Germans) are to be carefully distinguished from rocks containing ready-formed bitumen. 1920 A. W. Grabau Textbk. Geol. xviii. 580 Shales... When extremely rich in carbonaceous material they are called pyroschists. < as lemmas |
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