The oldest rocks on the seafloor are much younger than the oldest rocks on the continents.

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The oldest rocks on the seafloor are typically less than 200 million years old, while the oldest rocks on the continents can be up to 4 billion years old. This is because the seafloor is constantly being created and destroyed through the process of plate tectonics, while the continents are more stable and have had a longer time to accumulate older rocks.

The Oldest Rocks on the Seafloor Are Much Younger Than