For example, boundary type A might be described as having shallow earthquakes on the plate boundary, sparse or no volcanoes, lying on a topographic high, and following a line of young sea floor.

These convergent boundaries also occur where a plate of ocean dives, in a process called subduction, under a landmass. As the overlying plate lifts up, it also forms mountain ranges. In addition ...

Plate tectonics is the theory that Earth's outer layer is made up of plates, which have moved throughout Earth's history. The theory explains the how and why behind mountains, volcanoes ...