Question

As the East Pacific Rise creates a new crust, which trench (Tonga trench or Chile trench) would have the OLDEST rock? Explain WHY this makes sense.

Answer 1

Explanation:

• If new oceanic crust is being continuously created

along the earth’s spreading ridge system, then we

must find some way to re-cycle it back into the

mantle. [WHY? –otherwise the earth would be

expanding!!!!]