Navajo Sandstone, Zion National Park, Washington County. Photo by Lance Weaver.
About Utah Geological Survey
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Snow-capped hoodoos of the Eocene-age Pink Member of the Claron Formation glow in the evening sun. These hoodoos were sculpted by the effects of weathering and erosion from ice and rain. Learn more about how hoodoos are formed. Bryce Canyon National Park, Garfield County. Photo by Trevor Schlossnagle.
The evening sun casts a long shadow of a basaltic knob at Pot Mountain. These early Pleistocene-age rocks are likely eroded volcanic necks that may have erupted into water. The vents are now eroded and partially concealed by shoreline gravel of the late Pleistocene Lake Bonneville, giving the mountain a teapot-like shape when viewed from […]
Silver Island Mountains, Tooele County, Utah. Photo by Adam Hiscock.
Gypsum crystals from drying mudflats are blown into dunes patterned with sinuous ripples along the eastern margin of the Great Salt Lake Desert. Gypsum—an evaporite mineral that is soluble in water—is an uncommon constituent of sand. Knolls Dunes, Tooele County, Utah. Photo by Andy Cvar.
Mt. Ellen, Henry Mountains, Garfield County, Utah. Photo by Ken Krahulec.
Fall colors and snow compliment brightly colored lichen on Miocene-age volcanic boulders on the shore of Johnson Valley Reservoir. Cloud shadows dapple the Fish Lake Hightop, one of several high plateaus in central Utah dominated by Tertiary-age volcanic rocks. Fishlake National Forest, Sevier County, Utah. Photo by J. Lucy Jordan.
Yant Flat near Silver Reef, Washington County, Utah. Photo by Paul Inkenbrandt.
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