Question

What sort of rock makes up the walls of the Grand Canyon?

Answer 1

The walls of the Grand Canyon are made up of sedimentary rock. This rock was formed from layers of sediment that were deposited over millions of years. The layers of sediment were then uplifted and eroded by the Colorado River.

Answer 2

The walls of the Grand Canyon are made up of a variety of rocks, including sandstone, limestone, and shale. Most of the rocks in the canyon were formed over 250 million years ago, during the Paleozoic Era. The formations found in the canyon offer a glimpse into the geologic history of the Earth.