granodiorite


grano·di·o·rite

noun \ˌgra-nō-ˈdī-ə-ˌrīt\

Definition of GRANODIORITE

:  a granular intrusive quartzose igneous rock intermediate between granite and quartz-containing diorite with plagioclase predominant over orthoclase
grano·di·o·rit·ic \-ˌdī-ə-ˈri-tik\ adjective

First Known Use of GRANODIORITE

1893

granodiorite

noun    (Concise Encyclopedia)

Medium- to coarse-grained rock that is one of the most abundant intrusive rocks. It contains quartz and is distinguished from granite by having more plagioclase feldspar than orthoclase feldspar; its other mineral constituents include hornblende, biotite, and augite. Granodiorite is similar to granite in appearance but darker.

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