Crater and dome of Mt. St. Helens, WA
View over the crater and dome of Mt. St. Helens, Washington. In the background is Spirit Lake and Mt. Rainier. (260810-33)
Download ImageLahar, Mt. St. Helens, WA
Lahar from the 1980 eruption of Mt. St. Helens, Washington. (260810-17)
Download ImageSpirit Lake and Mt. Rainier, WA
View over Spirit Lake to Mt. Rainier from the crest of Mt. St. Helens, Washington. (260810-8)
Download ImageBasaltic dike intruding Yachats Basalt, OR
Breaking wave and basaltic dike intruding Upper Eocene Yachats Basalt. Cape Perpetua, Oregon (260730-18)
Download ImageKeystone Thrust fault, NV
Aerial view of Keystone Thrust fault, Nevada. Cambrian Bonanza King Formation, which makes up the gray, forested ridge, was emplaced over the tan and red Jurassic Aztec Sandstone. (260515-123)
Download ImageCrater Lake, Oregon
Aerial view of Crater Lake caldera, Oregon, Wizard Island, and old Mt. Mazama. View towards the north. (260515-28)
Download ImageErosional remmant, Utah
Erosional remnant of Jurassic Entrada Formation, southern Utah (260331-12)
Download ImagePetroglyphs and desert varnish, Utah
Petroglyphs in desert varnish covering Jurassic Navajo sandstone, Utah (260330-36)
Download ImagePetroglyphs and desert varnish, Utah
Petroglyphs in desert varnish covering Jurassic Navajo sandstone, Utah (260330-35)
Download ImagePetroglyphs and desert varnish, Utah
Petroglyphs in desert varnish covering Jurassic Navajo sandstone, Utah (260330-5)
Download ImageGroundwater seep in sandstone, Utah
Groundwater seep in cross-bedded sandstone, Zion National Park, Utah (260329-73)
Download ImageNavajo Sandstone, Utah
Dune-formed (aeolian) cross-bedding in Jurassic Navajo Sandstone, Zion National Park, Utah. (260329-72)
Download ImageTinaja in sandstone, Utah
Tinaja, a large natural water pocket, here in the Jurassic Navajo Sandstone of Zion National Park, Utah (260329-70)
Download ImageCross-bedded sandstone, Utah
Dune-formed (aeolian) cross-bedding in Jurassic Navajo Sandstone, Zion National Park, Utah. (260329-67)
Download ImageLarge-scale cross-bedding, Utah (vertical)
Dune-formed (aeolian) cross-bedding in Jurassic Navajo Sandstone, Zion National Park, Utah. Photo is about 1.5 meters across the bottom. (260329-35)
Download ImageClose-up of bedding in Jurassic Navajo Sandstone, Zion National Park, Utah
Close-up of bedding in Jurassic Navajo Sandstone, Zion National Park, Utah
Download ImageDesert varnish on sandstone, Utah
Desert Varnish (MnO2) on cross-bedding of the Jurassic Navajo Sandstone, Zion National Park, Utah (260329-12)
Download ImageCross-bedded sandstone, Utah (vertical)
Cross-bedded Navajo Sandstone (Jurassic) of the White Cliffs in Zion National Park, Utah (260328-55)
Download ImageCross-bedded sandstone, Utah
Cross-bedded Navajo Sandstone (Jurassic) of the White Cliffs in Zion National Park, Utah (260328-54)
Download ImageNavajo Sandstone, Utah (vertical)
Cross-bedded Navajo Sandstone (Jurassic) of the White Cliffs in Zion National Park, Utah (260328-48)
Download ImageNavajo Sandstone, Utah
Cross-bedded Navajo Sandstone (Jurassic) of the White Cliffs in Zion National Park, Utah (260328-46)
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