a rock consisting of a granular aggregate of green pyroxene and red garnet, often containing kyanite, silvery mica, quartz, and pyrite.
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How to use eclogite in a sentence
Only diamonds that formed after that date contain specks of eclogite, a rock forged from material dragged down from Earth’s surface.Scientists Pin Down When Earth’s Crust Cracked, Then Came to Life | Howard Lee | March 25, 2021 | Quanta Magazine
In another eclogite boulder, diamond was found partly embedded in pyrope.
In the Newlands boulder the diamonds have the appearance of being an original constituent of the eclogite.
On the other hand many tons of the somewhat similar eclogite in the De Beers mine have been crushed and have not yielded diamond.
Some regard the eclogite boulders as derived from deep-seated crystalline rocks, others as concretions in the blue ground.
With omphacite and smaragdite, garnet forms the peculiar rock called eclogite.
British Dictionary definitions for eclogite
a rare coarse-grained basic rock consisting principally of garnet and pyroxene. Quartz, feldspar, etc, may also be present. It is thought to originate by metamorphism or igneous crystallization at extremely high pressure
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
Scientific definitions for eclogite
A greenish, coarse-grained metamorphic rock consisting of pyroxene, quartz, and feldspar with large red garnet inclusions. Eclogites form under conditions of high pressure and moderate to high temperatures.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.