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单词 pyroschist
释义

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pyroschist
pyroschist n.
Brit. /ˈpʌɪrə(ʊ)ʃɪst/
,
U.S. /ˈpaɪrəˌʃɪst/
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.
extracted from pyro-comb. form
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