| 单词 |
flaser |
| 释义 |
flaser Geol.|ˈflɑːzə(r)|
[a. G. flaser, dial. form of flader streak, vein.]
Used attrib. to denote the presence of lenses of little-altered rock in a streaky parent rock that has been metamorphosed by shearing under pressure; it is found mainly in gabbro, gneiss, and granite; so flaser-gabbro, flaser granite, flaser rock, flaser schist, flaser structure.
1888C. Lapworth Page's Geol. (ed. 12) 108 A curious veiny or banded structure (flaser structure). 1888J. J. H. Teall Brit. Petrogr. vii. 177 In speaking of the foliated gabbros it is convenient to recognise two principal types which may be designated by the terms flaser-gabbro and gabbro-schist. Ibid. 245 In some of these a flaser structure has been developed by interstitial movement. 1891G. A. J. Cole Aids Pract. Geol. 210 This structure..appears to arise by interaction of the minerals when subjected to earth-pressures (‘Flaser-gabbros’, etc.). 1930Peach & Horne Geol. Scotl. 58 Flaser structure with abundant phacoids of felspar and hornblende. 1951Turner & Verhoogen Ign. & Metamorph. Petról. xxi. 543 There is continuous transition from mylonites to a group of rocks variously referred to as augen schists, mylonite gneisses, flaser rocks, and blastomylonites. 1954H. Williams et al. Petrogr. XI. 204 The terms flaser gabbro and flaser granite have long been applied by European petrologists to cataclasites in which granulated streaks and laminae swirl around and between streamlined eyes of undestroyed gabbro or granite. |
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