Introduction to Grand Canyon-Parashant (Alt + 1)
Visitor Center (Alt + 2)
The Colorado Plateau (Alt + 3)
A Journey Through Time (Alt + 4)
Ecology of the Monument (Alt + 5)
Geologic history of the Colorado Plateau
Ecology of the Colorado Plateau
Cultural history of the Colorado Plateau
Parashant's role within the Colorado Plateau
Help and Information Center (Alt + H)
Return to Grand Canyon-Parashant Main Index (Alt + I)
Return to Views Visitor Center (Alt + V)
Glossary (Alt + G)
Text-only Page (Alt + T)
Teacher Resource Center for Grand Canyon-Parashant (Alt + R)

Some areas on the Colorado Plateau are famous for the colorful sedimentary rocks. These rocks, so dramatically exposed in Grand Canyon National Park, Grand Canyon-Parashant National Monument, Monument Valley, and Canyon de Chelly, were formed many millions of years ago when a vast ocean covered Arizona and much of the western United States. Sandstone, shale, and limestone formed along the edge and underneath this ancient sea, building up to great thicknesses. In many areas, these layers of rock have remained flat, undisturbed by faulting.