Granodiorite

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A sample of granodiorite rock
A sample of granodiorite rock

Granodiorite (IPA: /ˌgɹanə(ʊ)ˈdaɪəɹaɪt, ˌgɹeɪn-/) is an intrusive igneous rock similar to granite, but contains more plagioclase than potassium feldspar. It usually contains abundant biotite mica and hornblende, giving it a darker appearance than true granite. Mica may be present in well-formed hexagonal crystals, and hornblende may appear as needle-like crystals.

On average the upper continental crust has the same composition as granodiorite.

The Rosetta Stone was carved out of grandiorite.

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