Numbers superimposed on the image represent age in millions of ... This data shows that building mountain ranges takes a long time – at least 30 million years, in this case – and that rocks ...

They are often found together in a group called a mountain range. The highest mountain ranges are created by tectonic plates pushing together and forcing the ground up where they meet. This is how ...

Luckily, America has its fair share of striking peaks and rugged mountain ranges to choose from, as well as plenty of charming alpine towns that go along with them. To help you choose your ideal ...