For Diorite we have terms and definitions in 4 topics. The topics are Geologic, Physical Geography, Science and Volcano.

Diorite (Geologic)

Intrusive igneous rock made of plagioclase feldspar and amphibole and/or pyroxene. Similar to gabbro only not as so dark, and containing less iron and magnesium.

Diorite (Physical Geography)

A coarse grained igneous rock of intrusive origin that is darker and chemically more mafic than granite.

Diorite (Science)

A coarse-grained igneous rock of intermediate chemical composition.

Diorite (Volcano)

A coarse, uniformly grained rock composed of a feldspar and less than 50% amphibole or pyroxene. A quartz diorite has the composition of a diorite plus quartz and biotite, whereas a granodiorite has the composition of a diorite plus quartz and two feldspars. An intrusive igneous rock. (Plank and Schenck, 1998)

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