Henry Mountains, Garfield County, Utah
Photographer: Ken Krahulec
The “dome” character of a laccolith, where the sedimentary rock layers are tilted upward on the mountain flanks, is evident at Mount Ellsworth in the Henry Mountains, Garfield County.
The La Sal Mountains, near Moab in southeastern Utah, are laccoliths formed when upwelling magma intruded into and bulged the overlying sedimentary rock layers upward. The magma did not reach the surface, but subsequent erosion of the softer sedimentary rocks exposed the peak-forming igneous rocks that rise above the surrounding landscape.
Paria Canyon–Vermilion Cliffs Wilderness Area, Kane County, Utah
Photographer: Tyler Knudsen
Morning sunlight illuminates water-sculpted walls of the Buckskin Gulch slot canyon. Cut deeply into Jurassic-age Navajo Sandstone, the Buckskin’s slot ranges from 5 to 25 feet wide and 100 to 500 feet high for 12 miles, making it the longest slot canyon in the world.
Blocky sandstone ledge deposited in an oasis-like setting between ancient sand dunes forms a resistant cap over beds of the Jurassic-age Navajo Sandstone. Chippean Rocks west of the Abajo Mountains, San Juan County.
The Owachomo Bridge was created by stream erosion of the Permian-age Cedar Mesa Sandstone. Owachomo, a Hopi term meaning “rock mound,” is named for the large rock mass found on the northeastern abutment of the bridge.