Canyonlands National Park Mancos Shale

This layer does not occur in Canyonlands.


Mid-Cretaceous (64 to 144 million years ago)

Depositional Environment

Near-shore regimes (e.g. tidal flats)


Slope forming, gray shales.


Slopes below the Book Cliffs along I-70 between Grand Junction, CO and Green River, UT. Floor of Cache Valley in Arches National Park.

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Currently Viewing Canyonlands National Park Mancos Shale
Featured Park
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.
Featured Wildlife
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.
Currently Viewing Canyonlands National Park Mancos Shale