Paleostress modeling shows how a region of the Andean Plateau was uplifted and formed beginning more than 20 million years ago.

Mountains form in a variety of ways, ... The rock that crumples up at the edges can give rise to mountain ranges such as the Andes, according to the University of California Museum of Paleontology.

Earth's crust is dripping "like honey" into our planet's hot interior beneath the Andes mountains, scientists have discovered. Skip ... pushing it thousands of miles into the air to form mountains.