A coarse-grained plutonic igneous rock, typically green or greenish-brown, consisting largely of olivine with minor amounts of chromite and other…
单词 | θ5727 |
释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > other plutonics (10) dunite1859 A coarse-grained plutonic igneous rock, typically green or greenish-brown, consisting largely of olivine with minor amounts of chromite and other… napoleonite1866 Geology. = corsite, n. Now rare. corsite1876 An orbicular gabbro found in Corsica. tonalite1879 Originally: a particular variety of quartz-diorite; later used for any quartz-diorite. Now spec. a rock in which quartz represents 20–60 per cent of… trout-stone1892 = troctolite, n. granodiorite1893 Any of the plutonic igneous rocks intermediate in composition between true granite and quartz-diorite, which are similar in appearance to granite… adamellite1896 = tonalite, n. Now disused. syenodiorite1917 A plutonic rock of a kind intermediate between syenite and diorite, containing both alkali feldspar and plagioclase. microdiorite1920 Any medium-grained or microcrystalline rock whose mineral composition is the same as that of a diorite. trondhjemite1922 Any leucocratic tonalite, esp. one in which the plagioclase is oligoclase. |
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