At the divergent plate boundaries new oceanic lithosphere is formed in the gaps of magma coming up from the mantle. The magma coming up forms mid-ocean ridges. They form along mountain chains that are marked as boundaries between diverging plates.
B. An oceanic plate sinks beneath another oceanic plate at a convergent boundary
They are The Atlantic<span>, </span>Pacific<span>, </span>Indian<span>, and Arctic.</span>
