They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
Separating Plates
A trench stretch is a long system of trench.
yes there was, there was usually a base trench, and close by was a suppport trench
At the front there was the front line, then there was the support trench and at the back was a reserve trench.
The world's largest trench is the marina trench which is found right above japan.
DeepOcean was created in 1999.
Trenches is the plural form.
The Marianas trench .
Separating Plates
a trench will form
Subduction.
spreading
a plateau
Ocean trenches form at areas of subduction.
convergent
The Volcanic Marianas Islands form west of the Marianas trench because plates are formed by underwater volcanoes which will move gently to the west.
Western Front