* Convergent Boundaries: When tectonic plates collide, one plate often subducts (sinks) beneath the other. As the subducting plate descends, it melts, creating magma that rises to the surface, forming volcanoes. These volcanoes often align in a line, creating a volcanic mountain range. The Andes Mountains and the Cascade Range are prime examples.
* Other Plate Boundaries: While less common, volcanoes can also form at other plate boundaries:
* Divergent Boundaries: Where plates pull apart, magma rises from the mantle, creating mid-ocean ridges and volcanic islands.
* Transform Boundaries: Volcanoes are less common at transform boundaries, where plates slide past each other, but they can occur where there's a change in the direction of the fault.
Important Note: The specific type of convergent boundary (ocean-ocean or ocean-continent) will influence the type of volcanic mountain range formed. For example, ocean-ocean collisions create island arcs (like Japan), while ocean-continent collisions create continental volcanic arcs (like the Andes).
