Fandom

Geology Wiki

Volcanic rock

519pages on
this wiki
Add New Page
Talk0 Share

Volcanic rocks are classified as igneous rocks, and as their name suggests, form as a result of volcanic eruptions. Each rock is named based on the silica content of the magma being erupted, which ranges from felsic to ultramafic. Volcanic rocks are extrusive igneous rocks, and therefore are classified separately from intrusive igneous rocks.

RhyoliteEdit

Rhyolite is felsic in composition.

AndesiteEdit

Andesite is intermediate in composition.

BasaltEdit

Basalt is mafic in composition.

KomatiiteEdit

Komatiite is ultramafic in composition, and is rarely seen on the Earth today except in flows that date back to the Archean.

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.