Q2 Earth’s oceanic crust is less than 180 million years old and about 20 km thick. The continental crust is 2 billion years old and 50 km thick. Use.

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Presentation transcript:

Q2 Earth’s oceanic crust is less than 180 million years old and about 20 km thick. The continental crust is 2 billion years old and 50 km thick. Use what you know about sea floor spreading to explain why they are different.

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