granodiorite

noun

1. An 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).”

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

   “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).”