Metavolcanic rock

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Metavolcanic rock is term used in geology to describe a type of metamorphic rock. Such a rock was first produced by a volcano, either as lava or tephra. Then, the rock was buried underneath subsequent rock and was subjected to high pressures and temperatures, causing the rock to recrystallize.

Metavolcanic rock can contain the minerals quartz, feldspar, amphibole, pyroxene. Less common minerals can include biotite, garnet, actinolite, epidote, chalcedony, prehnite, and wodginite.

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Categories: Petrology | Geology stubs

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• This page was last modified 20:37, 16 January 2007 by Wikipedia user Cuivienen. Based on work by Wikipedia user(s) Virek, Hike395 and Sorsanmetsastaja.
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