Which Mountain Is Older Appalachians Or Rocky?
Surprisingly, the Rockies are much younger than the eroded Appalachian Mountains to the east. The Rockies were formed between 80 and 55 million years ago, whereas the Appalachians are nearly 500 million years old. Are the Appalachian Mountains one of the oldest? The Appalachians are among the oldest mountains on Earth, born of powerful upheavals …