Intermediate composition
Type of igneous rock
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% SiO2. It is not an IUGS recognized term.
Common intermediate volcanic rocks include andesite and trachyandesite, while common intermediate plutonic rocks include diorite and granodiorite.
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