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Best Answer: The age of continental rocks are older than that of sea floor rocks. Ocean crusts form and deplete rapidly, and are generally quite young (180 million years or so for the oldest). Continental crusts generally are older (billions of years) because they deplete slowly, and mainly through erosion.
the crustal rocks on either side often have very different ages, as determined by radiometric dating, and more frequent earthquake activity along the features than occur elsewhere with the MOR system. Below is an image showing the age of the oceanic crust in the Atlantic Ocean. Problem 6. Answer questions using the image below. Where can the oldest oceanic crust be found? What is its age? Compare this to the oldest age for continental crust from Australia and North America, which are well over 3.5 billion years. Using your understanding of plate tectonics processes, explain why oceanic crust is so (relatively) young compared to that of continental crust.