The ocean crust becomes progressively older as you move away from the mid-ocean ridge. This is because new crust is formed at the ridge by upwelling magma, which then cools and solidifies. As the tectonic plates move apart, this new crust is pushed away from the ridge, making the crust further away older.

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The Ocean Crust

Question 99

Multiple Choice

The ocean crust

A) becomes progressively younger away from the mid-ocean ridges.
B) is the same age worldwide.
C) becomes progressively older away from the mid-ocean ridge.
D) ranges in age,the oldest ocean crust is in the Atlantic and the youngest is in the Arctic.

Correct Answer: