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

    Canyonlands

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Organ Rock Shale

photo: Remnants of Organ Rock Shale form many spires in the Maze District's Land of Standing Rocks.
Remnants of Organ Rock Shale form many spires in the Maze District's Land of Standing Rocks.
Photo by Mike Hill
 

Deposited:
Permian Period (245 to 286 million years ago)

Depositional Environment:
Marine lowlands, braided streams and tidal flats

Appearance:
Dark red, lumpy mudstones/sandstones (forms towers with protective White Rim caprock)

Examples:
Towers in Monument Basin at the Island in the Sky District as well as in the Land of Standing Rocks in the Maze

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.