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Oil pump jack on Great Plains, SE Wyoming
Oil pump jack on Great Plains, southeastern Wyoming (220916-93)
Download ImageWhite River and Arikaree Groups, Nebraska
Oligocene White River and overlying Oligocene-Miocene Arikaree Group, W Nebraska (220916-90)
Download ImageBluffs of flat-lying Oligocene-Miocene rock, Nebraska
Bluffs of flat-lying Oligocene White River Group and Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska
Download ImageWhite River and overlying Arikaree Groups, Nebraska
Eagle Rock, composed of approx flat-lying Oligocene White River Group and Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska (220916-81)
Download ImageRock fall deposit and cliffs, Nebraska
Rock fall deposit from large failure event on the cliffs above, an important mechanism of cliff retreat, Scotts Bluff National Monument, Nebraska (220916-79)
Download ImageRock fall deposit and cliffs, Nebraska (vertical)
Rock fall deposit from large failure event on the cliffs above, an important mechanism of cliff retreat, Scotts Bluff National Monument, Nebraska (220916-78)
Download ImageAsh bed in sandstone, Arikaree Group, Nebraska
Ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska 220916-69)
Download ImageBluffs and Great Plains, Nebraska
Flat-lying rocks of the Oligocene White River Group and overlying Oligocene-Miocene Arikaree Group form the South Bluffs section of Scotts Bluff National Monument, Nebraska. The buildings are the monument headquarters, residence area, and visitor center. (220916-57)
Download ImageCliffs of Tertiary rocks and Great Plains, Nebraska (Vertical)
Cliffs of flat-lying Oligocene White River Group and overlying Oligocene-Miocene Arikaree Group overlooking the Great Plains, Scotts Bluff National Monument, Nebraska (220916-38)
Download ImageCliffs of Tertiary rocks and Great Plains, Nebraska
Cliffs of flat-lying Oligocene White River Group and overlying Oligocene-Miocene Arikaree Group overlooking the Great Plains, Scotts Bluff National Monument, Nebraska (220916-37)
Download ImageConcretions and cross-bedded sandstone, Nebraska
Concretions and cross-bedded sandstone of the Oligocene-Miocene Arikaree Group, Nebraska (220916-34)
Download ImageBluffs and Great Plains, Nebraska
Flat-lying rocks of the Oligocene White River Group and overlying Oligocene-Miocene Arikaree Group form bluffs overlooking the Great Plains, Scotts Bluff National Monument, Nebraska (220916-27)
Download ImageWhite River and overlying Arikaree Groups, NE (vertical)
Eagle Rock, composed of approx flat-lying Oligocene White River Group and Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska (220916-14)
Download ImageWhite River and overlying Arikaree Groups, Nebraska
Eagle Rock, composed of approx flat-lying Oligocene White River Group and Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska (220916-12)
Download ImageBluffs and Great Plains, eastern Wyoming
Bluffs of Oligocene and Miocene rock overlook the Great Plains of eastern Wyoming (220916-1)
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Potomac River, Maryland (left)-Virginia (right)
Looking downstream at Mather Gorge on the Potomac River. Bedrock is Proterozoic-Cambrian Mather Gorge Formation. Great Falls Park, Virginia (220909-86)
Download Imagefolded quartz in schist, Virginia
folded quartz in schist of the Proterozoic-Cambrian Mather Gorge Formation, Great Falls Park, Virginia (220909-83)
Download ImageSchist of Mather Gorge Formation, Virginia (vertical)
Outcrop of Proterozoic-Cambrian schist of the Mather Gorge Formation and the Potomac River, Virginia. The other side of the river lies in Maryland. (220909-77)
Download ImageGreat Falls of the Potomac River. Virginia (L)- Maryland (R)
Great Falls of the Potomac River. Virginia (L)- Maryland (R) at Great Falls Park. Bedrock is metagraywacke and schist of the Proterozoic-Cambrian Mather Gorge Formation. (220909-74)
Download ImageSchist of Mather Gorge Formation, Virginia
Outcrop of Proterozoic-Cambrian schist of the Mather Gorge Formation and the Potomac River, Virginia (220909-69)
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