单词 | nordmarkite |
释义 | nordmarkite/ˈnɔːdmɑːkʌɪt/noun 1 Mineralogy. A brown variety of staurolite rich in manganese. 2 Geology. A syenite composed mainly of microperthite, with lesser amounts of quartz and usually oligoclase and biotite, and characterized by a trachytoid or granitic texture. OriginMid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. In sense 1 from Nordmark, the name of an area in Sweden + -ite. |
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