High Quality Content by WIKIPEDIA articles! Navajo Sandstone is a geologic formation in the Glen Canyon Group that is spread across the U.S. states of northern Arizona, northwest Colorado, and Utah; as part of the Colorado Plateau province of the United States. This rock formation is particularly prominent in southern Utah, where it forms the main attractions of a number of national parks and monuments including Zion National Park, Capitol Reef National Park, Glen Canyon National Recreation Area, Grand Staircase-Escalante National Monument, and Canyonlands National Park. Navajo Sandstone frequently occurs above the Kayenta Formation and Wingate Sandstone, the other formations of the Glen Canyon Group. Together, these three formations can result in immense vertical cliffs of up to 2,200 feet (670 m). Atop the cliffs, Navajo Sandstone often appears as massive rounded domes and bluffs that are generally white in color.