When tectonic plates collide can form mountain ranges or large mountains, for example, the Himalayas is formed from the collision of two plates.
On the other hand when there is subduction (an oceanic plate sinks under the continental plate) mountainous systems are also formed, the lower plate melts and generates volcanic eruptions such as those that form some of the Andes mountains in South America.
Finally, deep depressions such as the Great Rift Valley are formed on land where plates are separated.
When two tectonic plates are colliding, the chances of earth quake is high and while it also creates mountain, deep trenches.
Collision of Two Tectonic Plates
A converging plates boundary is formed when two tectonic plates collide. This will create the phenomenon of Subduction, which is when one plate move beneath the other.
The two changes which will be visible on Earth Surface, are as follows:
The changes like deep trenches and earthquake could be rapid.
While the formation of Mountain ranges will be slow.
