• 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 some roads in the Needles District and some of the roads into the Maze District. 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?

Juniper Berries

The Utah juniper, one of the most common trees in the southwest, has the ability to self-prune. During droughts, these trees will cut off fluids from one or more branches so that the rest of the tree can survive. More...