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Boudinaged dike in gneiss, Wisconsin
Boudinaged dike in deformed Proterozoic gneiss, Wisconsin (20BLJ-18)
Download ImageCleaved phyllite and uncleaved sandstone (quartzite)
Cleaved phyllite and uncleaved sandstone of the Proterozoic Baraboo Quartzite at Van Hise Rock, Wisconsin. (20Bar-7)
Download ImagepC-Cambrian Unconformity, Wisconsin
Angular unconformity between gently tilted (to the left; the steep planes are fractures) Proterozoic Baraboo Quartzite and overlying flat-lying Cambrian sandstone, near Baraboo, Wisconsin (20Bar-2)
Download ImageBadlands erosion, Theodore Roos NP, N. Dakota
Flat-lying floodplain-deposited sedimentary rocks of the Paleocene Fort Union Group exposed by erosion into grasslands, Theodore Roosevelt National Park, North Dakota (9OtR-280)
Download ImageBadlands erosion, Theodore Roosevelt NP, N. Dakota
Badlands erosion of floodplain deposits Paleocene Fort Union Group, Theodore Roosevelt NP, North Dakota (9OtR-278)
Download ImageRed clinker, Theodore Roos NP, N. Dakota
Red bed of clinker, formed by burning of lignite in Paleocene Fort Union Formation, Theodore Roosevelt National Park, North Dakota (9OtR-277)
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Shiprock, New Mexico (Pan)
Shiprock, a diatreme with several large radiating dikes. One of the dikes forms the ridge on the left side of the photo. Northern New Mexico (9OtR-186)
Download ImageShiprock and dike, New Mexico (vertical)
Shiprock, a diatreme with several large radiating dikes. One of the dikes forms the erosion-resistant ridge on the left side of the photo. Northern New Mexico (9OtR-184)
Download ImageOxbow lake and Chippewa R., WI
Aerial view of Oxbow lake and the floodplain of the Chippewa River, occupied by Eau Claire, Wisconsin. (9A94-343)
Download ImageClastic dikes, Badlands NP, S. Dakota.
Clastic dikes intruding horizontal Eocene-Oligocene White River Group, Badlands National Park, South Dakota (4BAd-17)
Download ImageOligocene Brule Fm, Badlands NP, S Dakota
Horizontally dipping floodplain sediments and paleosols of Oligocene Brule Fm, Badlands National Park, South Dakota (4Bad-15)
Download ImagePaleosols, Badlands NP, SD (vertical)
Yellow Mounds Paleosol and overlying red Interior Paleosol, Badlands National Park, South Dakota. Overlying rocks are the Eocene Chadron and Oligocene Brule Formations. (4Bad-14)
Download ImagePaleosols, Badlands NP, South Dakota
Yellow Mounds Paleosol and overlying red Interior Paleosol, Badlands National Park, South Dakota. Overlying rocks are the Eocene Chadron and Oligocene Brule Formations. (4Bad-13)
Download ImageProterozoic conglomerate, Michigan
Proterozoic Copper Harbor Conglomerate, Upper Peninsula, Michigan (2SedA-15)
Download ImageOrdovician shale, northern Kentucky
Ordovician shale with thin beds of limestone, northern Kentucky (2SedA-12)
Download ImageProterozoic Ripplemarks, Michigan (vertical)
Ripplemarks in Proterozoic Nonesuch Shale, Upper Peninsula, Michigan (2SedA-1)
Download ImagePillars of Rome, Oregon (Pan)
Miocene lake and river deposits–Rome beds –also called the “Pillars of Rome” (120624-19)
Download ImageMiocene lake beds, Oregon
Erosion of Miocene lake and river deposits–Rome beds –also called the “Pillars of Rome” (120624-23)
Download ImageErosion of Miocene lake beds, Oregon
Eroded Miocene lake and river deposits–Rome beds –also called the “Pillars of Rome” (120624-19)
Download ImageMultiple basaltic lava flows (CRBG), NE Oregon
Stacked lava flows of the Imnaha Basalt, (Columbia River Basalt Group) Imnaha Canyon and Wallowa Mountains, Oregon (120623-9)
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