More than 3000 miles (4800 kms) from the northern most part of British Colombia in western Canada to New Mexico
The Rocky Mountains are considered a cordillera because they are a series of mountain ranges that run parallel to each other. This long chain of mountains was formed by the collision of tectonic plates, resulting in a continuous mountainous region.
The rocky mountains spread over 4800 kilometers The Rocky Mountains spread over 4800 kilometers.
A. The Appalachian Mountains are found in the eastern United States and the Rocky Mountains are found near the west coast. B. The shorter and more rounded Appalachian Mountains are more than four times older than the taller and more jagged Rocky Mountains. C. The length of the Appalachian chain is approximately 2,400 kilometers, and the Rocky Mountain chain is about twice as long. D. The Appa Mountains are composed mostly of sedimentary rocks while the Rocky Mountains also contain other rock types.
A long time ago
They are about 2045 miles long.
Mid-Atlantic chain
i belive the rocky moutains... someone else who is smarter should answer though
A long narrow chain of hills and mountains is called a mountain range or a mountain chain.
Go find out ... couch potato
Probably not forever, but I'm pretty sure they were there for a long time.
Over long periods of time, soil and new sediments.
Geologically speaking the Appalachians are older. The Rockies are an example of geological upheaval, while the Appalachians used to be a solid plain millions of years ago and eroded to become the mountains we have today.