Geology | Jurassic sea of sand stretched for miles and miles

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Sand. Sand as far as the eye could see. Sand that stretched from central Arizona to northern Wyoming and spilled into California and Nevada. Dunes as tall as 30 feet.

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One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014POTD September 9, 2014: Navajo Sandstone cliffs, Kolob Canyons, Zion National Park, Washington County, Utah
One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014POTD December 23, 2014: Zion National Park, Washington County, Utah
One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014Meet Marshosaurus, the Jurassic’s Forgotten Predator
One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014POTD July 8, 2013: Capitol Reef National Park, Garfield County, Utah
One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014The Original Jurassic Park
One of numerous slot canyons carved into Jurassic-age Navajo Sandstone in Zion National Park, Bear Trap Canyon is particularly dark and narrow. With little sunlight penetrating to the canyon floor, snow and ice often linger well into spring. Zion National Park, Washington County, Utah Photographer: Tyler Knudsen; © 2014What Killed the Dinosaurs in Utah’s Giant Jurassic Death Pit?