Metavolcanic rock

In geology, metavolcanic rock is 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 is commonly found in greenstone belts.[1]

Metavolcanic rock from Michigan, USA.

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

See also

Metasedimentary rock – Metamorphic rock from a sedimentary precursor

References

"Geologic units containing Metavolcanic rock". United States Geological Survey. Retrieved 2018-06-17.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.