At divergent boundaries ... Wannamaker and colleagues use electrical resistivity data to investigate a plate boundary in New Zealand where a subduction zone beneath the North Island is lengthening ...

Keep an eye on the map to see where in the world the activity takes place. Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock ...

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