The Navajo Sandstone makes major cliffs and other outcrops i…
The Navajo Sandstone makes major cliffs and other outcrops in Zion National Park and in Canyonlands National Park. It also shows up in Bryce Canyon National Park, although not much of it is seen there. But 100 or so miles south of those three parks, in the Grand Canyon region, the Navajo Sandstone is absent. What is the most significant reason it is not there?