Areas where tectonic plates make contact with each other are known as convergent boundaries. Collisions between two plates are very slow, with movement of only a few centimeters per year occurring at the convergent boundaries.
There are many types of plate boundaries depending on the density and type of plate involved. Continental and oceanic plates that meet at a convergent boundary form a subduction zone, with the heavier oceanic plate forced under the less dense continental plate. Mountains, earthquakes and volcanoes are formed by the movement of tectonic plates and are often found close to the convergent boundaries where plates meet.