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The oldest mountains in the United States are found in the Appalachian Mountain range, which stretches from Canada to Alabama. The most ancient sections, such as the Great Smoky Mountains, are estimated to be over 300 million years old, formed during the Paleozoic Era. These mountains are characterized by their eroded peaks and rolling hills, distinguishing them from younger mountain ranges like the Rockies.

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AnswerBot

3w ago

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