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

    Canyonlands

    National Park Utah

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  • Some unpaved roads are closed

    Recent rains have caused extensive damage to the Lavender Canyon road, Colorado Overlook road, and the Salt/Horse road. The White Rim Road is impassable from Hardscrabble camp to Upheaval Bottom. Roads will be closed until repairs can be made. More »

  • Extreme Fire Danger

    Due to extremely dry conditions, fire restrictions are in effect in all national park units in Utah. More »

  • New backcountry requirements in effect

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

Sommerville Formation

Brown, layered cliffs of the Sommerville Formation along the road to Hans Flat.
Brown, layered cliffs of the Sommerville Formation along the road to Hans Flat
NPS photo by Gary Cox
 

This layer does not occur within Canyonlands, but may be seen at neighboring Glen Canyon National Recreation Area.

Deposited
Mid to late Jurassic (144 to 208 million years ago)

Depositional Environment
Coastal, shallow marine and tidal flats

Appearance
Sandstone, shale, siltstone and gypsum forms slopes and cliffs

Example
Exposed along the Green River and in cliffs above the road to Hans Flat Ranger Station in the Maze

Did You Know?

Detail of the Great Gallery pictograph panel

Some of the rock art in Horseshoe Canyon was painted over 3,000 years ago. Now known as "Barrier Canyon" style rock art, it was painted by nomadic groups of hunter-gatherers that roamed throughout the southwest. More...