At divergent boundaries, plates move away from each ... and ultimately leads to the formation of the volcanoes observed in many subduction zones around the Pacific 'ring of fire', including ...

These types of collisions can also lead to underwater volcanoes that eventually build up into island arcs like Japan. At divergent boundaries in the oceans, magma from deep in the Earth's mantle ...

producing volcanoes, such as Mt. St. Helens. Most of the subducting plate continues into the mantle, perhaps to reappear much later at a distant divergent boundary.

This is called a constructive or divergent plate boundary. These are usually found under oceans. As the plate moves apart, magma rises to the surface and cools, forming shallow-sided volcanoes.

Trigger volcanoes. Create new sea floor ... Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock, to rise from the Earth's ...