• Spires of Cedar Mesa sandstone in Chesler Park (Needles District)

    Canyonlands

    National Park Utah

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  • Partial White Rim Road closure 7/7/14-7/11/14

    The White Rim Road will be closed from July 7th through July 11th to allow for replacement of a large culvert under the road. The closure area is from the junction of the Shafer Trail Road and the Potash Road to Musselman Arch. More »

  • New backcountry requirements in effect

    Hard-sided bear containers are required for backpackers in parts of the Needles District. More »

Green River Formation

Green River formation
Utah Geological Survey photo
 

This layer does not occur in Canyonlands but may be seen while rafting the Green River through Desolation Canyon, driving Nine Mile Canyon near Wellington, UT, or exploring elsewhere in the southeast Uinta Basin.

Deposited:
Early Tertiary Period (1.6 to 66 million years ago)

Depositional Environment:
Lakes

Appearance:
Continuous grey/brown slopes of shale

Examples:
Uinta Basin in north-central Utah

Note:
The Green River Formation contains what might be the largest deposits of oil shale in the world.

Did You Know?

Summer Monsoon

Much of canyon country's annual precipitation falls during summer monsoons. These dramatic storms often last less than twenty minutes but can cause powerful flash floods despite their brevity.