granodiorite

/ ˌɡrænəʊˈdaɪəˌraɪt /

noun

1. a coarse-grained acid igneous rock containing almost twice as much plagioclase as orthoclase: intermediate in composition between granite and diorite

granodiorite

/ grăn′ə-dī′ə-rīt′ /

1. A coarse-grained igneous rock consisting primarily of quartz, plagioclase, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. It is the coarse-grained equivalent of dacite.

Word History and Origins

Origin of granodiorite¹

C19: from grano + diorite

Example Sentences

From other areas the same materials are present plus sandstone, granite, and granodiorite.

From Project Gutenberg