A kind of coarse granite found chiefly in Cornwall. Frequently attributive.
| 单词 | θ5719 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > granite > varieties of (18) moorstone1461 A kind of coarse granite found chiefly in Cornwall. Frequently attributive. silver stone1758 a variety of granite. granitell1794 A binary granite, or granular aggregate of two ingredients (see quot. 1794). granitoid1794 A granitoid rock. rapakivi1794 In full rapakivi granite. A form of granite originally identified in southern Finland, characterized by large ovoid crystals of potassium feldspar… ophthalmite1811 Geology. = miagite, n. Obsolete. rare. protogine1823 A variety of granite occurring in the Alps, containing chlorite and often having a foliated structure resembling that of gneiss, which was… pegmatite1824 A coarsely crystallized rock commonly occurring in igneous intrusions, esp. dykes, and consisting mainly of feldspar and quartz, with the… potash-granite1845 granite containing potassium feldspar. beresite1849 See quot. 1879. granitite1875 A variety of granite (see quot. 1879). greisen1878 A granitic rock with crystalline-granular texture, consisting chiefly of quartz and mica. trowlesworthite1884 An altered granite in which fluorite, orthoclase, and tourmaline have taken the place of the original quartz, feldspar, and mica. microgranite1888 Granite, or a granite, that has a very fine (microgranitic) texture. charnockite1893 Hypersthene-granite; any of a series of rocks containing hypersthene and typically found in southern India. alaskite1900 A pale variety of granite consisting predominantly of alkali feldspars and quartz. Dartmoor granite1904 (see quot.). plagiogranite1959 Any of a range of granitic rocks, occurring particularly in ophiolites, which are low in potassium and rich in sodic plagioclase feldspar. |
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