Everybody knows Mt. Rushmore as the mountain with the presidents on it but it is actually an up warped mountain. An up-warped mountain is formed when forces inside Earth push up blocks of Earth’s crust. Eventually when the mountain erodes the softer part of the mountain will crumble away leaving behind the hard crystalline structure.The faces will eventually were down to round blobs in the side of the mountain.

Mount Rushmore an Up-warped Mountain