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 biotitemica 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. Image File history File links Mineraly. ... Image File history File links Mineraly. ... For information on how to read IPA transcriptions of English words see here. ... Volcanic rock on North America Plutonic rock on North America Igneous rocks are formed when rock (magma) cools and solidifies, with or without crystallisation, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. ... Quarrying granite for the Mormon Temple, Utah Territory. ... Lunar Ferroan Anorthosite #60025 (Plagioclase Feldspar). ... Feldspar (from the German Feld, field, and Spat, a rock that does not contain ore) is the name of an important group of rock-forming minerals which make up perhaps as much as 60% of the Earths crust. ... A Biotite slice Biotite is a common phyllosilicate mineral that contains potassium, magnesium, iron and aluminium. ... For other uses, see Mica (disambiguation). ... Amphibole (Hornblende) Hornblende is a complex inosilicate series of minerals. ...
On average the upper continental crust has the same composition as granodiorite.
The Rosetta Stone was carved out of grandiorite. The Rosetta Stone in the British Museum. ...
External link
Granodiorite definition at USGS (public domain source)
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