What happens when ocean plates collid?

When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. ... Old, dense crust tends to be subducted back into the earth. An example of a subduction zone formed from a convergent boundary is the Chile-Peru trench

Explanation:

Which can cause a tsunami since it is underwater.

Yw :)

Cuando las placas tectónicas chocan, la que queda por debajo se consume en el manto de la Tierra, creando una erupción de magma caliente que sale al exterior a través de volcanes formados en la placa superior. Estos volcanes forman un arco volcánico. Hay ejemplos de este tipo de fenómeno natural en todo el mundo.

Explanation:

they were destroyed coming out of the civil war but after he war they were booming. if you need an in-depth answer follow up with me  

down below