How are mountains formed when a plated with an oceanic crust meets one with a cnotinental crust?

Answer 1

The oceanic plate is more dense than the continental plate, and will subduct, or move underneath, the lighter continental plate. The result is that the continental plate is uplifted. As the oceanic crust goes deeper and deeper, the temperatures become higher, causing the subducting crust to eventually melt into the mantel. The heat and gas pressure from the melting of the subducting crust may eventually seek release in the form of a volcano. The rate of crustal movement is slow, measured in a small number of inches per year, but the volcanism and crustal uplifting and folding eventually create mountains.

Answer 2

When a plate with oceanic crust collides with one with continental crust, the denser oceanic plate is forced beneath the continental plate in a process called subduction. The oceanic plate melts and forms magma, which rises to the surface and causes volcanic activity. Over time, layers of volcanic rock build up to form mountains along the boundary between the two plates.