Question

what type of mountains are commonly formed at ocean-ocean and ocean-continental convergent plate boundaries?

Answer 1

The Cascade Mountain Range is a line of volcanoes above the melting oceanic plate. The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is subducting beneath the South American plate.

Answer 2

Hello! I hope this helps :

Most divergent plate boundaries are underwater.. While the process is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.

your answer should be the divergent plates.