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dolerite

[dol-uh-rahyt] /ˈdɒl əˌraɪt/
noun, Petrology
1.
a coarse-grained variety of basalt.
2.
any of various other igneous rocks, as diabase.
3.
any basaltlike igneous rock whose composition can be determined only by microscopic examination.
Origin of dolerite
1830-1840
1830-40; < French dolérite < Greek doler(ós) deceitful (derivative of dólos wile) + French -ite -ite1
Related forms
doleritic
[dol-uh-rit-ik] /ˌdɒl əˈrɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dolerite
  • Desert sands of this region have taken on the deep, dark color of eroded volcanic layers of dolerite.
  • The belt is underlain by gabbro, aluminous dolerite, and sedimentary rocks.
British Dictionary definitions for dolerite

dolerite

/ˈdɒləˌraɪt/
noun
1.
a dark basic intrusive igneous rock consisting of plagioclase feldspar and a pyroxene, such as augite; often emplaced in dykes
2.
any dark igneous rock whose composition cannot be determined with the naked eye
Derived Forms
doleritic (ˌdɒləˈrɪtɪk) adjective
Word Origin
C19: from French dolérite, from Greek doleros deceitful; so called because of the difficulty of determining its composition
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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dolerite in Science
dolerite
  (dŏl'ə-rīt')   
See diabase.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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