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GranodioriteGranodiorite (pronounced /ˌgrænəˈdaɪəraɪt/, /ˌgreɪn-/) 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. Additional recommended knowledgeOn average the upper continental crust has the same composition as granodiorite. The Rosetta Stone was carved out of grandiorite. |
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Granodiorite". A list of authors is available in Wikipedia. |
