________ develop where oceanic lithosphere bends downward and sinks into the mantle.

Show more Show less

Answer


Frank

Trenches, more formally called subduction zones, form when older, denser oceanic plates, the lithosphere, collide with newer, lighter continental plates in a process called subduction. The heavier, denser lithosphere is pushed down into the mantle, under the lighter continental plates. In the process, some of the lithosphere melts, forms magma and rises to the crust and helps form the trenches that are already developing where the oceanic crust has been pushed under. In this process, old crust is destroyed and formed into new crust in the formation of trenches.

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit