Volcanoes are primarily associated with two types of plate boundaries:
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Convergent Boundaries: At convergent boundaries, one tectonic plate is forced beneath another in a process known as subduction. The subducting plate melts as it descends into the mantle, and this molten material can rise to the surface, leading to volcanic activity. This is commonly seen in regions like the Pacific Ring of Fire, where oceanic plates converge with continental plates.
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Divergent Boundaries: At divergent boundaries, tectonic plates move apart from each other. As the plates separate, magma rises from the mantle to fill the gap, creating new crust. This process can lead to volcanic activity, typically seen along mid-ocean ridges (e.g., the Mid-Atlantic Ridge).
Transform Boundaries do not typically create volcanoes, as the plates slide past each other horizontally, and there is no significant melting or magma generation associated with this type of boundary.
In summary, the types of plate boundaries that can create volcanoes are convergent and divergent boundaries.