What rocks formed the Rocky Mountains?

Answer 1

Put a piece of notebook paper flat on a table. Put your hands on the opposite two ends. Slide your hands toward each other, and the paper will lift right up between your hands. This is how the Rockies were formed, except in place of paper was huge rocky plates, and instead of hands were huge forces caused by the rocks deep, deep down moving towards the West and running into other huge rocky plates.
when the earths plates moved most of them crashed and they started to go up.

Answer 2

The Southern mountains of the Rockies were formed in the late Precambrian, around 600 million years ago, whereas the Northern mountains were formed in the late Cretaceous to early Tertiary, around 70-65 million years ago.

Answer 3

Yes and no. The Rocky Mountains were formed between 80 and 35 million years ago by what is called the Laramide orogeny. Basically the oceanic crust got pushed under the continental crust and large landforms were crated. Over millions of years, erosion sculpted the mountains into what we see today.

Answer 4

when a couple of the tectonic plates squished together they are forced upwards and make mountains

Answer 5

Tectonic forces pushed them up, erosion wore them down.

Answer 6

it was created by erosion and weathering

Answer 7

Big Ones