These cut grey, locally graphitic siltstones of the Middle to Upper Jurassic Ashman Formation. Stratified intermediate composition tuffs and/or greywacke and mudstone with minor silicification and ...
Located in the Devils Garden area, Landscape Arch is North America's longest arch, stretching an amazing 306 feet. To view the arch, you can take an easy, flat 50-minute hike from the Devils ...