POTD April 15, 2014: Canyonlands National Park, San Juan and Wayne Counties, Utah

Canyonlands National Park, San Juan and Wayne Counties, Utah
Photographer: Rich Emerson; © 2012

Uplift of the Colorado Plateau has caused the Green River to entrench its meandering path into the relatively soft rocks of the Permian-age Organ Rock Shale. At Soda Springs Basin, vertical cliffs of the more-resistant White Rim Sandstone cap the Organ Rock Shale 400 feet above the river.