Which of the following is not produced by plate tectonics?
a. mid-ocean rifts
b. rift valleys
c. the ring of fire
d. the Appalachian Mountains
e. Earth's magnetic field
Question 2
The youngest parts of Earth's crust are
a. the bottom layer found in the walls of the Grand Canyon.
b. the continents.
c. the continental margins.
d. the Appalachian Mountains.
e. the mid-ocean rifts.
