granodiorite(redirected from Grandiorite)
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A coarse-grained igneous rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene.
gran′o·di′o·rit′ic (-rĭt′ĭk) adj.
(Geological Science) a coarse-grained acid igneous rock containing almost twice as much plagioclase as orthoclase: intermediate in composition between granite and diorite
[C19: from grano + diorite]