How do convergent boundaries form?

2 Answers
Mar 23, 2018


When two plates push against eachother.


Two plates push against eachother, resulting in a convergent plate boundary. A type of landform that can result from this are mountains.

Mar 24, 2018


Convergent boundaries form where two moving plates meet.


What goes up must go down. Divergent boundaries are creating new crust that push outward as the magma comes to the surface at the top of convection current within the mantle. The cooler magma must return to the mantle or go down again.

The places where the crust returns to the mantle form subduction zones. The colder magma drags the attached crust down with it as the convection current pulls the cooler magma down. At the same time if the Ocean crust is meeting a continental crust the denser ocean crust is pushed underneath the continental crust.
This is a common form of a convergent boundary. Sometimes it is two ocean crust that meet at the convergent boundary. This forms deep ocean trenches.

There is only so much surface on the earth. As the divergent boundaries create new crust, somewhere the old crust must be destroyed to make room for the new crust.

The older ocean crust is destroyed at the convergent boundaries of a subduction zone. This is where an ocean crust meets another ocean crust or a continental crust. In other places a continental crust meets another continental crust. In this convergent boundary the crust is crumpled and compacted to make room for the newly formed divergent boundaries pushing against the continental crusts. High mountains are formed where a continental crust meets another continental crust.

Convergent boundaries are formed by the collisions of the expanding tectonic plates. The expansion of some crustal plates requires the contraction of other crustal plates. The contraction occurs at convergent boundaries.