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

He points out that eclogite has been known to crystallize some 80 kilometers below the surface, not having necessarily needed the deeper subduction implicated in the Wilson Cycle.

From Scientific American • Jul. 25, 2011

This is still more forcibly suggested by the remarkable eclogite boulder found in the blue ground of the Newlands mine, not far from the Vaal river, and described by T. G. Bonney.

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