granodiorite

plural granodiorites

1. geographyAn intrusive igneous rock similar to granite, but containing more plagioclase than potassium feldspar.

   The dominant intruding rocks into the metamorphosed rocks of the Oban massif are granodiorites (Fig. 1).

   1996, Bart N. Ekwueme, Alfred Kröner, “Emplacement Age of the Uwet Granodiorite and Implications for the Technothermal Evolution of the Oban Massif Southeastern Nigeria”, in R. Chandra, R.K. Srivastava, editors, Magmatism in Relation to Diverse Tectonic Settings, page 346

   2 more examples

   Of the high-silica, coarse-grained, quartz-rich igneous rocks, granodiorites are quantitatively the most important.

   2009, George Rapp, Archaeomineralogy, page 51

   Most of the rocks in the calc-alkaline association are granitoids, that is they are granites, granodiorites and tonalites all containing >20% quartz, with feldspar, mica and amphibole in various combinations (Chapter 3, Figures 3.10 and 3.11).

   2011, Dougal Jerram, Nick Petford, The Field Description of Igneous Rocks, unnumbered page