granodiorite

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  13. granodiorite
Scope note
A type of granular acid igneous rock intermediate in composition between quartz diorite and quartz monzonite, containing quartz, oligoclase or andesine, and potassium feldspar, with biotite, hornblende, or, less frequently, pyroxene, as the mafic components. Granodiorite is the intrusive equivalent of rhyodacite.
granodiorite
Accepted term: 13-May-2024