Intermediate composition

In igneous petrology an intermediate composition refers to the chemical composition of a rock that has 52-63 wt% SiO₂ being an intermediate between felsic and mafic compositions. Typical intermediate rocks include andesite, dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks.

单词	Intermediate rock
释义	Intermediate rock 英语百科 Intermediate composition In igneous petrology an intermediate composition refers to the chemical composition of a rock that has 52-63 wt% SiO₂ being an intermediate between felsic and mafic compositions. Typical intermediate rocks include andesite, dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks.
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Intermediate rock

Intermediate composition