Most of the rocks in Zion National Park are sedimentary rocks –made of bits and pieces of older rocks that have been weathered, eroded, and deposited in layers. These rock layers hold stories of ancient environments and inhabitants very different from those found in Zion today. In this distant past, Zion and the Colorado Plateau were near sea level, and were even in a different place on the globe—close to the equator. The rock layers found in Zion today were deposited between approximately 110 –270 million years ago –only in recent geologic time have they been uplifted and eroded to form the scenery of Zion National Park.
To learn about the history revealed by each of Zion's rock layers, and where they can be found in the park, click on the formation names beneath the stratigraphic column (below).
Zion's rock layers, from youngest to oldest:
Return to the main Geology page
Geology pages created with David Tarailo and Scott Ireland, interns with the NPS Geoscientists-in-the-Parks program, run in partnership with The Geological Society of America's GeoCorps America Program.