White Rim Sandstone
NPS Photo by Neal Herbert
Permian Period (245 to 286 million years ago)
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
Flash animations manage to simplify the story of Canyonlands.
Last Updated: 07/01/2015