When two plates move towards each other, the boundary is called a convergent boundary. The process is called "subduction" when the denser plate sinks into the mantle beneath the less dense plate, causing earthquakes and volcanoes.
When two plates move towards each other, the boundary is called a convergent boundary. The process is called "subduction" when the denser plate sinks into the mantle beneath the less dense plate, causing earthquakes and volcanoes.