What features of the ocean floor is deepest?

Trenches are the deepest features of the ocean floor. They are long, narrow, and deep depressions in the ocean floor that are typically shaped like a "V" or "U." Trenches are found along convergent plate boundaries, where two tectonic plates collide and one plate is forced to move beneath the other. The deepest trench in the world is the Mariana Trench, located in the western Pacific Ocean. The deepest point in the Mariana Trench is the Challenger Deep, which is 10,994 metres deep.