Geology lesson.
Beautiful stone formations of Zion National Park. Perhaps you can see the line in the middle of this stone formation. These cliffs were formed by the movement of the Earth during earthquakes. In some cases the ground sank and in others it rose. Over millions of years, these cliffs formed due to the separation of the top and bottom of land mass. This is different than the formation of the Grand Canyon which was formed by the erosion of the Colorado River. There is a river running through this valley, however. It is called the Virgin River.