单词 | rhyolite |
释义 | rhyoliten. Geology. Originally: a variety of trachyte, containing quartz. In later use: a typically pale, fine-grained extrusive volcanic rock of granitic composition, often porphyritic in texture and commonly showing flow structure. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > volcanic rocks > other volcanics tarras1612 greystone1781 trass1794 rhyolite1861 nephelinite1863 metavolcanic1942 the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > volcanic rocks > trachyte > varieties of rhyolite1861 nevadite1868 propylite1868 trachyte tuff1885 ciminite1896 grorudite1896 hedrumite1896 kenyte1900 mugearite1904 the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > porphyrite rock > varieties of red rock1721 oriental verd-antique1852 kersanton1862 kersantite1868 uralite-porphyry1868 monchiquite1891 vogesite1891 camptonite1895 hedrumite1896 wyomingite1897 spessartite1908 rhyodacite1913 rhyolite1932 1861 Q. Jrnl. Geol. Soc. 17 12 A large mass of trachyte and an eruptive rock of the variety named ‘Rhyolite’ by Baron Richthofen have been observed. 1897 A. Geikie Anc. Volcanoes Brit. I. 19 A rhyolite felsite or allied variety. 1932 A. Johannsen Descr. Petrogr. Igneous Rocks II. 268 Most rhyolites are light in colour: white, yellow, brown, or pink, but yellowish green and even deep red rocks are found. 1955 Sci. News Let. 9 July 20/2 The ancient implements are made chiefly of slate and shale but some are of jasper, quartz and rhyolite porphyry (rock of lava origin). 1977 A. Hallam Planet Earth 164/1 Rhyolite eruptions are characteristic of areas of active mountain-building such as island arcs (e.g., Sumatra, Japan, West Indies), and mountain chains such as the Andes. 2004 Earth Island Jrnl. Autumn 37/3 Organ Pipe Cactus National Monument..features enormous rhyolite cliffs in the Ajo Mountains. Derivatives rhyoˈlitic adj. of or resembling rhyolite; relating to rhyolite. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > volcanic > trachyte > varieties of rhyolitic1864 propylitic1868 mugearitic1911 1864 C. F. Fischer tr. F. C. R. von Hochstetter Geol. New Zealand 55 The eruptive masses of the Taupo zone consist of lava (the richest known) of silicious earth, also of rhyolithic [sic] rocks of all kinds. 1866 P. H. Lawrence tr. B. von Cotta Rocks Classified 216 The rhyolitic division of the trachytes. 1935 Trans. Amer. Geophysical Union 309 Although commonly and perhaps generally associated with deposits of light-colored volcanic ash of rhyolitic composition, the welded tuff is not confined to this association but occurs also on older rocks. 2000 J. Nicoletta Buildings of Nevada 112/2 Surviving structures..were constructed of native rhyolitic stone in hues of pink, green, and brown. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < |
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