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How are diorite rocks formed?

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Diorite. Updated Thursday 28th September 2006. A brief description of the nature of diorite. Diorite is a coarse-grained intrusive igneous rock. It contains large interlocking, ... Diorite formed deep within the Earth's crust from cooling magma that never made it to the surface. read more

Diorite is a coarse-grained intrusive igneous rock. It contains large interlocking, randomly oriented crystals. It is a dark coloured rock, usually medium to dark grey, containing many mafic crystals. read more

Diorite is the name used for a group of coarse-grained igneous rocks with a composition between that of granite and basalt. It usually occurs as large intrusions, dikes, and sills within continental crust. These often form above a convergent plate boundary where an oceanic plate subducts beneath a continental plate. read more

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