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% SiO2. It is not an IUGS recognized term.[1]
Common intermediate volcanic rocks include andesite and trachyandesite, while common intermediate plutonic rocks include diorite and granodiorite.
References
[edit]- ↑ Mcnair, B. (2024-01-28). "Intermediate Rock Composition and Examples". Geology Base. Archived from the original on 2024-02-26. Retrieved 2026-06-08.
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