Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various coarse-grained igneous rocks that consist mainly of olivine and pyroxene and are believed to be a main constituent of the earth's mantle.

from The Century Dictionary.

  • noun A rock composed essentially of olivin, with which are usually associated more or less of one or more of the minerals enstatite, diallage, augite, magnetite, chromite, and picotite.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology, mineralogy A rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a dark coarse-grained igneous rock consisting principally of olivine

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From peridot +‎ -ite.

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Examples

  • C peridotite and dunite the upper mantle is composed of ultramafic rock called peridotite which is mostly olivines and pyroxenes.

    Earth Robot | SciFi, Fantasy & Horror Collectibles 2009

  • Geologist Peter Kelemen and fellow scientists from the Earth Institute at Columbia University went to Oman and discovered that a special kind of rock called peridotite has the potential to suck up billions of pounds of CO2.

    Sustainable: Oman, Want Our Carbon? 2008

  • It is a unique type of rock, peridotite, which is normally found only much deeper in the earth, but which juts up to the mantel in the Atlantic massif.

    TreeHugger 2010

  • It is a unique type of rock, peridotite, which is normally found only much deeper in the earth, but which juts up to the mantel in the Atlantic massif.

    TreeHugger 2010

  • Their studies show that the rock, known as peridotite, reacts naturally at surprisingly high rates with CO2 to form solid minerals-and that the process could be speeded a million times or more with simple drilling and injection methods.

    innovations-report 2008

  • Their studies show that the rock, known as peridotite, reacts naturally at surprisingly high rates with CO2 to form solid minerals-and that the process could be speeded a million times or more with simple drilling and injection methods.

    Earth News, Earth Science, Energy Technology, Environment News 2008

  • The studies show that the rock, known as peridotite, reacts naturally at high rates with carbon dioxide (CO2) to form solid minerals - and that the process could be speeded with simple drilling and injection methods.

    India eNews 2008

  • The researchers have shown that rock formations called peridotite, which are found in Oman and several other places worldwide, including California and New Guinea, produce calcium carbonate and magnesium carbonate rock when they come into contact with carbon dioxide.

    Breakthrough 2008

  • The upper one, from 67. 0m to 70. 3m is a medium grained, dark grey-green to grey, lineated, biotitized, foliated metagabbroic peridotite which is weakly garnetiferous.

    The Earth Times Online Newspaper 2010

  • The approach consists of drilling into a layer of peridotite which is fractured and heated.

    EcoEarth.Info Environment RSS Newsfeed 2008

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