Question

occurence of deeps and trenches

Answer 1

"Both are formed Due to tectonic plate movement. Sometimes due to violent shaking of plates,for example earthquake. "


Trenches are formed by subduction, a geophysical process in which two or more of Earth's tectonic plates converge and the older, denser plate is pushed beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust (the lithosphere) to bend and form a steep, V-shaped depression.

(Subduction: The process by which one tectonic plate goes under another plate, forming a trench at the meeting point.)

The formation of deep ocean trenches occurs when one tectonic plate goes under another one, when two plates separate, and when earthquakes cause tears in the crust.

Example of deep ocean trench - mariana trench