Hadal.
Oceanic Zone
A subduction zone or a trench.
Trench
the answer i Izu the trench
A subduction zone is formed where two oceanic plates collide. One plate is forced beneath the other, creating a deep trench and often leading to volcanic activity and earthquakes.
an oceanic trench
an oceanic trench
The Benioff Zone is formed when a piece of oceanic crust is being subducted into the mantle. This line of earthquakes follow the angle of the subducting plate as it slides beneath the continental crust.
That feature is known as a deep-sea trench, where one tectonic plate is subducted beneath another. The process creates deep oceanic trenches, such as the Mariana Trench, which is the deepest point on Earth's surface.
The earth has plates and when the earth shirfts its plates it open a trench canyon like structure. sorry if my grammer is not perfect. An oceanic trench forms when a denser plate is subducted into the Earth at a convergent plate margin. Because the denser plate (always oceanic crust) is being bent and pulled down into the mantle, a trench forms at this subduction zone.
trench
The pacific oceanic plate is sinking beneath the continental plate to which Japan is attached in what is called a subduction zone. The oceanic plate is being destroyed.