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 ...

or slide under that plate. A collisional boundary occurs where two land masses on plates are pushed together. Trying to occupy the same space, the land masses buckle and fold, creating mountain ...

The colorful swirls and stripes that characterize China's Rainbow Mountains would have remained hidden without the epic tectonic collision that created the Himalayas.

The force of this collision is so great that mountains are created ... San Andreas Fault in the USA, which forms the tectonic boundary between the Pacific Plate and the North American Plate.