Why Does Oceanic Lithosphere Almost Always Sink Beneath Continental Lithosphere

question 31

Multiple Choice

Why does oceanic lithosphere almost always sink beneath continental lithosphere at convergent plate boundaries?

• A) Oceanic lithosphere moves so slowly that it can only sink.
• B) Oceanic lithosphere is at the bottom of the ocean, so it can't float high enough to ride over a continent.
• C) Oceanic lithosphere is almost twice as dense as the underlying mantle.
• D) Oceanic lithosphere is denser than continental lithosphere.
• E) Oceanic lithosphere is partly liquid, so it floats on the solid continental lithosphere.

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