A deep ocean trench is a portion of the Earth's crust in which a tectonic plate is being subducted (pushed down) below another plate. At the border of the 2 plates there is a down turned portion of the uppermost plate along the uppermost edge of the subducting plate. Within this area a trench is formed and as correctly pointed out, this plate interaction does cause the deepest places on Earth.
the space where the continental plate has subducted under the oceanic plate
Deep Ocean Trench
a rift
fault
the deep crack in the earth's surface is the rift
fissure, volcano, ditch, valley.
A deep crack in the earth's surface is a fault It can also be a joint.
Cracks in the Earth's crust are faults.
a rift, crevice, or canyon depending on the depth.
A deep crack in the earth's surface is called a fault.
the deep crack in the earth's surface is the rift
a fault
fissure, volcano, ditch, valley.
canyon
A deep crack in the earth's surface is a fault It can also be a joint.
a fault
the deep crack in the earth's surface is the rift
A deep crack in the earth's surface is a fault It can also be a joint.
the deep crack in the earth's surface is the rift
A volcanic fault is a deep crack in the earth.
it is called a crevase