The characteristics of deep trenches indicate:
A) they are submerged erosional features.
B) they are elongated depressions in the oceanic crust.
C) they are glacial troughs dating back to the Ice Age.
D) they are erosional canyons cut by turbidity currents.

Question

Quizplus · Accepted Answer

Deep trenches are elongated depressions in the oceanic crust. They are formed due to the subduction of one tectonic plate beneath another. As the denser oceanic plate sinks into the mantle, it creates a deep depression or trench in the overriding plate.

The Characteristics of Deep Trenches Indicate