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epidiorite

American

[ep-i-dahy-uh-rahyt] / ˌɛp ɪˈdaɪ əˌraɪt /

noun

Petrography.

a schistose metamorphic rock resulting from the alteration of augite to hornblende in a gabbro or dolerite.

Etymology

Origin of epidiorite

First recorded in 1885–90; epi- + diorite

Example Sentences

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epidiorite

The metamorphic rocks are associated with bands of epidiorite which have shared in the folding and metamorphism of the region.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" by Various

The third group of epidosites may form bands, veins, or irregular streaks and nodules in masses of epidiorite and hornblende-schist.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023