What are the 2 oldest landforms in the united states?

Appalachian Mountains and Rocky Mountains

Explanation:

The Appalachian Mountains may be some of the oldest mountains on earth. The segmented chain of landforms cuts across the eastern side of North America, including U.S. states such as New York, Pennsylvania, Connecticut and Alabama. The highest range is the Blue Ridge Mountains, and the highest peak is at Mount Mitchell.

The Rocky Mountains are a mountain range that passes through the western states, such as Utah and Colorado. The Rockies are taller, steeper and craggier than the Appalachians because the western mountains are not old enough to have experienced the same amount of wearing by the elements. Yellowstone National Park and Royal Gorge are examples of the various tourist attractions that are set in the Rocky Mountains.

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