![]() Paleogeographic map courtesy of Ron Blakey, Colorado Plateau Geosystems, Inc. ![]() NPS photo/Adrienne Fitzgerald ~210-225 million years ago
The Chinle Formation consists of mudstone, siltstone, sandstone, and conglomerate that were deposited in the channels and floodplains of a large river system.
The bottom portion of the Chinle Formation is called the Shinarump Conglomerate Member, consisting of gravel and cobble-filled conglomerates deposited by high-energy braided rivers.
![]() NPS photo ![]() NPS photo Outcrops of the Chinle Formation in Zion National Park can be found in the Kolob Canyons section, and in the southwestern part of the park near the Chinle Trail.
![]() NPS photo Learn more about the fossils found in the Chinle Formation
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Last updated: June 13, 2015