Geology understands how landforms were created, have changed over time, and how they will evolve. Learn more about the geologic history of Earth and more.

Erosion, Weathering, and Soils

Land Surface

Rocks and Minerals

Grand Canyon Age

How Was the Grand Canyon Formed?

Like a stack of pancakes, younger rock layers pile on top of older layers. We use the law of superposition to reveal Earth’s age and Grand Canyon geology.