Some mountain ranges are formed when two sections of the Earth’s outer surface, called tectonic plates, push against each other and the pressure forces the ground up. Not all mountains are ...

The mountains were formed around 1.7 billion years ago amid a plate tectonic collision between the North American Plate and a since-lost oceanic plate, causing Earth's crust to crumple up ...

This is how the mountains of the Himalayas in Asia were formed. The Andes are the world's longest mountain range. This causes lava to erupt out of the gap that is left. As it cools down ...