Question

define old and young mountains​

Answer 1

The most basic difference is the age of the mountains. A young fold mountain range is generally between 10 and 25 million years old while an old fold mountain range can be over 200 million years old. ... Old fold mountains are usually lower elevation and can appear more like rolling hills such as the Appalachians

Answer 2

Young: A young fold mountain range is generally between 10 and 25 million years old.

Old: An old fold mountain range can be over 200 million years old.

Old fold mountains are usually lower elevation and can appear more like rolling hills such as the Appalachians.