单词 | ophiolite |
释义 | ophioliten.adj. A. n. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > serpentine serpentine1426 ophite1592 serpentine stone1662 viper-stone1741 serpent-stone1757 ophiolite1824 society > occupation and work > materials > raw material > stone or rock > [noun] > marble > made of serpentine, calcite and dolomite verd-antique1745 verde antico1753 ophiolite1824 the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > marble > serpentine ophitesa1398 serpentine1426 ophite1592 serpentine marble1601 serpentine stone1662 viper-stone1741 verd-antique1745 verde antico1753 serpent-stone1757 ophiolite1824 ophicalcite1866 the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > serpentine > mixed with other minerals ophiolite1824 ophicalcite1866 1824 H. T. De la Beche tr. A. Brongniart Table Classif. Mixed Rocks in Sel. Geol. Mem. p. xiii Ophiolite. A paste of serpentine enveloping disseminated oxidulated iron and other accessory minerals. 1862 J. D. Dana Elem. Geol. viii. 82 Ophiolite (or verd-antique marble). A variegated mixture of serpentine and either carbonate of lime (calcareous ophiolite), dolomite (dolomitic ophiolite), or carbonate of magnesia or magnesite (magnesitic ophiolite). 1876 D. Page Adv. Text-bk. Geol. (ed. 6) viii. 158 The name serpentine, or its learned equivalents—ophite and ophiolite. 2. Geology. Any of a group of basic and ultrabasic igneous rocks, including serpentinite and serpentinized peridotite, gabbro, and diabase, which are thought to have been formed as a result of the submarine eruption of oceanic crustal and upper mantle material. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > hypabyssal rocks picrite1868 tinguaite1890 grorudite1896 hedrumite1896 heumite1901 plumasite1903 ophiolite1937 1937 A. L. Du Toit Our Wandering Continents viii. 168 There is a wide development in Morocco, Spain and the Alpine region of the so-called greenstones or ‘ophiolites’. 1951 M. L. Wolf Dict. Arts 481/1 The word ophiolite is employed by some authorities in describing the entire classification of all serpentines. 1972 Sci. Amer. May 66/3 The Ural and Appalachian-Caledonian mountain belts..have narrow zones where ophiolites are found. 1993 Jrnl. Petrol. 34 682 The picritic and tholeiitic rocks are geochemically similar to typical ocean-floor rocks and they represent in situ equivalents of ‘classic’ obducted ophiolites. B. adj. Geology. Designating a complex of ophiolites, pillow lava, and radiolarian chert occurring in a characteristic pattern of layers in the Alps and elsewhere. ΚΠ 1963 Special Papers Geol. Soc. Amer. No. 73. 204 Throughout the Alpine-Himalayan system extensive lavas occur in close association with coarse mafic and ultramafic rocks... This assemblage is the ophiolite suite of Alpine writers. 1985 R. Thorpe & G. Brown Field Descr. Igneous Rocks i. 4 These rocks form a distinctive association which may be recognized in ancient orogenic belts, where it is termed the ophiolite association. 2001 Jrnl. Zool. 255 331 This area..[of New Guinea] is geologically distinctive in having several diverse accreted terranes juxtaposed there, including an ophiolite complex. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < n.adj.1824 |
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