About a million years old
Appalachian, the oldest mountain range in the US
The Appalachian Mountain Range is the youngest mountain range discovered, yes.
the Appalachian mountain range
The Appalachian Mountains are the major mountain range in the Eastern US.
Appalachian Mountain Range
The Appalachian Mountain Range.
The Blue Ridge Mountains are part of the Appalachian Mountains.
The oldest mountain range on Earth is thought to be the Appalachian Mountains. They are said to be nearly 500 million years old.
The Appalachian mountain range is in the eastern part of the USA, from Maine to Georgia.
Appalachian Mountains
The Appalachian mountain range is the oldest mountain range in North America
The Appalachian mountain range is the oldest mountain range in North America