Author Question: How do deep-ocean trenches form? A) Magma from a partially melting tectonic plate makes its way ... (Read 48 times)

kfurse · **on:** Jul 16, 2018

How do deep-ocean trenches form?

A) Magma from a partially melting tectonic plate makes its way through the crust.
B) Subducting lithosphere descends into the mantle.
C) Two tectonic plates diverge and create a rift valley.
D) Sediments from a turbidity current settle out in a deep ocean basin.

Question 2

Volcanic islands such as the Hawaiian islands form as a result of ________.

A) subduction
B) rifting
C) mantle plumes
D) batholith emplacement