This sequence shows the rock layers from youngest (top) to oldest (bottom). For clarity, some layers have been included that are not found within the park, but are visible from locations near the park boundary, such as the visitor center. The most dominant rock layers at Arches are the Navajo Sandstone through the Slick Rock Member of the Entrada.
Did You Know?
Native Americans never inhabited Arches on a year-round basis, though they certainly roamed the area searching for wild game, useful plants and rocks for tool-making. Petroglyphs near Wolfe Ranch are thought to have been created by Indians from the Ute/Paiute cultures. More...