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mylonite

[mahy-luh-nahyt, mil-uh-] /ˈmaɪ ləˌnaɪt, ˈmɪl ə-/
noun
1.
Geology. a rock that has been crushed and sheared to such an extent that its original texture has been destroyed.
Origin
1885-1890
1885-90; mylon- (representing Greek mýlos mill) + -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for mylonite
  • West of the mylonite is a feldspar-rich amphibolite gneiss.
  • The intensity of strain within the regional foliation locally grades to mylonite.
British Dictionary definitions for mylonite

mylonite

/ˈmaɪləˌnaɪt; ˈmɪlə-/
noun
1.
a fine-grained metamorphic rock, often showing banding and micaceous fracture, formed by the crushing, grinding, or rolling of the original structure
Word Origin
C19: from Greek mulōn mill
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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mylonite in Science
mylonite
  (mī'lə-nīt')   
A fine-grained laminated metamorphic rock in which preexisting minerals have been partially pulverized and drawn out into bands. Mylonite forms along geologic faults where shearing and grinding of rocks takes place.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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