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单词 mylonite
释义

myloniten.

Brit. /ˈmʌɪlənʌɪt/, /ˈmɪlənʌɪt/, U.S. /ˈmaɪləˌnaɪt/
Origin: A borrowing from Greek, combined with an English element. Etymons: Greek μυλών , -ite suffix1.
Etymology: < ancient Greek μυλών mill-house, mill ( < μύλη , μύλος mill, millstone (see meal n.1) + -ών, suffix forming nouns) + -ite suffix1.Coined by C. Lapworth (see quot. 1885). N.E.D. (1908) gives only the pronunciation (məi·lŏnəit) /ˈmaɪlənaɪt/.
Geology.
A schist, esp. a banded one, resulting from the grinding or crushing of rocks.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > schist > varieties of
hammochrysos1706
hornslate1791
hornblende slate1794
horn porphyry1794
horn-schist1799
mica-slate1809
green schist1817
hornblende schist1821
kinzigite1878
phyllite1878
spilosite1882
mylonite1885
1885 C. Lapworth in Nature 8 Oct. 559/1 The gneisses and pegmatites..are crushed, dragged, and ground out into a finely-laminated schist (Mylonite, Gr. mylon, a mill).
1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) x. 236 Mylonites are granulated at such depths that they do not lose coherence as breccias do.
1965 Economist 10 July 157/2 This was merely a curtain raiser to..the 165 days spent digging out a 788-ft zone of crumbling mylonite by hand.
1991 New Scientist 13 Apr. 26/3 Mylonites are tough, banded, fine-grained rocks that geologists had associated with fault zones for more than a hundred years.
This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).
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n.1885
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