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greenschist

[green-shist] /ˈgrinˌʃɪst/
noun, Petrology
1.
schist colored green by an abundance of chlorite, epidote, or actinolite.
Compare greenstone.
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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green schist in Science
greenschist
  (grēn'shĭst')   
A green, schistose metamorphic rock that gets its color from the presence of chlorite, epidote, or actinolite. Greenschist forms under conditions of low temperature and low pressure.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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