Any mottled black and white nepheline-syenite that also contains oligoclase, microperthite, and biotite.
| 单词 | θ5722 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > syenite > varieties of (8) miaskite1840 Any mottled black and white nepheline-syenite that also contains oligoclase, microperthite, and biotite. uralite-syenite1868 uralite-porphyry, uralite-syenite: (see quots.). foyaite1878 A kind of syenite. nepheline-syenite1885 A plutonic rock which resembles syenite in being composed of alkali feldspars and mafic minerals, but also contains nepheline, is rich in sodium but… pulaskite1891 An alkali syenite containing a small proportion of nepheline. nordmarkite1892 Geology. A syenite composed mainly of microperthite, with lesser amounts of quartz and usually oligoclase and biotite, and characterized by a… larvikite1895 A kind of syenite that has a characteristic coarse texture dominated by rhombs of soda or soda-lime feldspar, with augite as the chief mafic… shonkinite1895 A dark granular form of syenite consisting largely of augite and orthoclase. |
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