Who is older Appalachian mountains or the rocky mountains compare features?

The Appalachian Mountains are older than the Rocky Mountains, having formed around 480 million years ago, while the Rockies began forming approximately 80 million years ago. The Appalachians feature rounded peaks and a more subdued topography due to erosion, while the Rockies are characterized by sharp, jagged peaks and dramatic elevations. Additionally, the Appalachians have a more diverse range of flora and fauna due to their age and varied climates, while the Rockies exhibit more alpine environments and rugged landscapes.