White Rim Sandstone

large chunks of white-topped rock sit on top of darker brown rock
White Rim Sandstone layer is more resistant to erosion. It's visible as large chunks and caprocks sitting atop the more easily eroded Organ Rock Shale.

NPS/Chris Wonderly


Permian Period (245 to 286 million years ago)

Depositional Environment:
Wind-blown beach sands

White, cross-bedded sandstones forming cliffs and caprocks

White canyon rim marking the inner gorge of the Colorado and Green rivers at the Island in the Sky district of Canyonlands


Rock Strata

Last updated: October 4, 2019

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