Intermediate composition
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In igneous petrology, an intermediate composition refers to a rock whose chemical composition is intermediate between felsic and mafic compositions, typically containing about 52–63 wt% SiO 2 . It is not an IUGS recognized term. Common intermediate volcanic rocks include andesite and trachyandesite, while common intermediate plutonic rocks include diorite and granodiorite.
In igneous petrology, an intermediate composition refers to a rock whose chemical composition is intermediate between felsic and mafic compositions, typically containing about 52–63 wt% SiO 2 . It is not an IUGS recognized term. Common intermediate volcanic rocks include andesite and trachyandesite, while common intermediate plutonic rocks include diorite and granodiorite. ==References==
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