Canyonlands National Park Chinle Formation

The Chinle Formation is composed of the Shinnarump and Moss Back members. Each has different characteristics due to changes in the depositional environment.


Triassic Period (208 to 245 million years ago)

Depositional Environment

Tropical streams, lakes and swamps


Multi-colored slopes of clay with dark brown sandstone ledges (Moss Back)


Uranium is often found in the Moss Back Member of the Chinle. Though most Uranium mines are in the Morrison Formation , the famous Mi Vida mine in Lisbon Valley was in the Chinle. The multi-colored clays in the Chinle are bentonite (volcanic ash).


Talus slopes immediately below the Wingate cliffs at the Island in the Sky District of Canyonlands.

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Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
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