eclogite

American  

[ek-luh-jahyt] / ˈɛk ləˌdʒaɪt /

noun

1. 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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eclogite British  

/ ˈɛkləˌdʒaɪt /

noun

1. 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

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eclogite Scientific  

/ ĕk′lə-jīt′ /

1. 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.

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Etymology

Origin of eclogite

1815–25; < Greek eklog ( ḗ ) selection ( see eclogue) + -ite ¹

Example Sentences

Searching for that eclogite metamorphic rock, and listening to Coltrane as you turn the bend.

From Los Angeles Times • Nov. 4, 2022

Pyroxenes are commonly found in mafic igneous rocks such as peridotite, basalt, and gabbro, as well as metamorphic rocks like eclogite and blue-schist.

From Textbooks • Jan. 1, 2017

Most blueschist forms in subduction zones, continues to be subducted, turns into eclogite at about 35 km depth, and then eventually sinks deep into the mantle — never to be seen again.

From Textbooks • Jan. 1, 2015

Don Anderson, a professor emeritus of California Institute of Technology's Division of Geological and Planetary Sciences agrees that finding eclogite in itself might not be enough to indicate the emergence of full-blown continental plates.

From Scientific American • Jul. 25, 2011

Some regard the eclogite boulders as derived from deep-seated crystalline rocks, others as concretions in the blue ground.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" by Various