Mineralogy. An earthy feldspathic rock of igneous origin, and of various dull colours: the harder varieties were known as compact feldspar. When…
| 单词 | θ5764 |
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > other igneous (18) clay-stone1777 Mineralogy. An earthy feldspathic rock of igneous origin, and of various dull colours: the harder varieties were known as compact feldspar. When… variolite1781 A fine-grained igneous rock, often basaltic or andesitic, containing spherical or ovoid crystalline masses (typically pale and several millimetres… pyroxenite1845 Rock that consists chiefly of minerals of the pyroxene group, typically of igneous origin and found in association with gabbro and peridotite; a… aplite1862 An igneous rock with a homogeneous fine- or medium-grained texture consisting predominantly of alkaline feldspar and quartz, typically pale in… anorthosite1863 A granular igneous rock composed mainly of a soda-lime feldspar. teschenite1866 A name given to certain eruptive rocks, occurring at Teschen in Silesia and elsewhere, intercalated and intrusive in the Cretaceous formation. yellow ground1883 a brownish-yellow, oxidized form of the igneous rock kimberlite, sometimes containing diamonds, which occurs at or near the land surface; cf. blue g… kimberlite1887 The eruptive rock, or ‘blue ground’, which is the matrix of the diamond at Kimberley and elsewhere in South Africa; it occurs in cylindrical… sanidinite1887 a rock consisting largely of sanidine. websterite1890 An ultramafic, ultrabasic rock formed in the cavities and fissures of other rocks and composed of approximately equal amounts of orthopyroxene… essexite1891 Any crystalline igneous rock consisting of labradorite or similar plagioclase, alkali feldspar, and nepheline, together with various mafic minerals. monzonite1895 Geology. A granular igneous rock with a composition intermediate between syenite and diorite, spec. one containing approximately equal amounts of… missourite1896 A granular, dark-coloured, plutonic rock composed mainly of leucite, pyroxene, and sometimes olivine. theralite1898 Any of a group of mafic, intrusive, igneous rocks that contain nepheline and calcic plagioclase. heronite1899 A dark-coloured igneous rock of the phonolite group containing orthoclase, labradorite, aegirine, etc., in a matrix of analcime. kentallenite1900 An olivine-bearing monzonite. carbonatite1924 Any intrusive or extrusive igneous rock containing a significant proportion (usually greater than 20 per cent) of carbonate minerals. wonderstone1936 A soft bluish-grey rock of volcanic origin in South Africa that takes a high polish. |
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