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What does diorite mean?

Looking for the meaning or definition of the word diorite? Here's what it means.

Noun
  1. (petrology) A grey intrusive igneous rock composed mostly of plagioclase feldspar, biotite, hornblende and/or pyroxene.
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Examples
Small intrusions of mafic diorite and large intrusions of granophyric diorite cut the bedded sequence.
Generally speaking, the soils produced from diorite are superior to those from dolerite.
The cliffs around Port Dickson consist of diorite, hard and difficult to break in pieces, but weathering readily.
At this location, a succession of chloritized volcaniclastic sedimentary rocks are over-thrust by a massive undeformed quartz diorite.
Permian and Triassic plutonic complexes comprise monzonite, granite, granodiorite or tonalite with minor gabbro and diorite.
Felspar is one of the principal constituents of almost all igneous rocks, such as granite, diorite, and basalt.

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