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