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What the parts of a volcano are The four main types of volcanoes What the different types of magma are Basics of volcanic rocks
Where Volcanoes Form
The map on this page was produced by the United States Geologic Survey, the Smithsonian Institute, and the United States Naval Research Laboratory. It shows the outlines of Earth's crustal plates, and also the incidences of earthquakes and volcanism associated with plate tectonics.

There are three places that volcanism commonly occurs. These are at hot spots, spreading centers and fault zones, and subduction zones.

Information on hot spots
Information on spreading centers
Information on subduction zones