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Ash bed in Oligocene-Miocene rock, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/10/220916-106.jpg?w=1500&ssl=1)
Ash bed in Oligocene-Miocene rock of the Arikaree Group, Scotts Bluff National Monument, Nebraska (220916-106) volcanic air fall, Tertiary
Download ImageAsh bed in Oligocene-Miocene rock, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/10/220916-76.jpg?w=1500&ssl=1)
Volcanic ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska. (220916-76)
Download ImageConcretions and cross-bedded sandstone, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/10/220916-33.jpg?w=1500&ssl=1)
Irregularly shaped concretions and cross-bedded sandstone of the Oligocene-Miocene Arikaree Group, Scotts Bluff, Nebraska (220916-33)
Download ImageFoliation in Ordovician gneiss, Delaware
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/10/220909-9.jpg?w=1500&ssl=1)
Foliation in Ordovician Brandywine Blue Gneiss of the Wilmington Complex, Delaware (220909-9)
Download ImageBoudin of quartz-feldspar gneiss in granofels
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/10/220905-4.jpg?w=1500&ssl=1)
Boudin of granitic gneiss in older Silurian-Devonian granofels, New Hampshire (220905-4)
Download ImageSeneca Rocks, West Virginia
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220908-11.jpg?w=1500&ssl=1)
Seneca Rocks, made of Silurian Tuscarora Sandstone, West Virginia (210908-11)
Download ImageCliffs of White River and overlying Arikaree Groups, NE
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-118.jpg?w=1500&ssl=1)
Cliffs of flat-lying Oligocene White River Group below Oligocene-Miocene Arikaree Group of Scotts Bluff National Monument, Nebraska (220916-118)
Download ImageEdge of Ash bed in Oligocene-Miocene sandstone, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-112.jpg?w=1500&ssl=1)
Edge of Ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska 220916-112)
Download ImageScotts Bluff and Great Plains, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-110.jpg?w=1500&ssl=1)
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 (220916-110)
Download ImageConcretions and cross-bedded sandstone, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-109.jpg?w=1500&ssl=1)
Concretions and cross-bedded sandstone of the Oligocene-Miocene Arikaree Group, Nebraska (220916-109)
Download ImageProterozoic pegmatite in granite, Colorado
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-103.jpg?w=1500&ssl=1)
Lens of Proterozoic pegmatite in granite, Colorado (220916-103)
Download ImageProterozoic pegmatite in schist, Colorado
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-99.jpg?w=1500&ssl=1)
Proterozoic pegmatite forming small sills in schist, Colorado (220916-99)
Download ImageOil pump jack on Great Plains, SE Wyoming
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-95.jpg?w=1500&ssl=1)
Oil pump jack on Great Plains, southeastern Wyoming (220916-95)
Download ImageOil pump jack on Great Plains, SE Wyoming
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-93.jpg?w=1500&ssl=1)
Oil pump jack on Great Plains, southeastern Wyoming (220916-93)
Download ImageWhite River and Arikaree Groups, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-90.jpg?w=1500&ssl=1)
Oligocene White River and overlying Oligocene-Miocene Arikaree Group, W Nebraska (220916-90)
Download ImageBluffs of flat-lying Oligocene-Miocene rock, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-87.jpg?w=1500&ssl=1)
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
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-81.jpg?w=1500&ssl=1)
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
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-79.jpg?w=1500&ssl=1)
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)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-78.jpg?w=1500&ssl=1)
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
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-69.jpg?w=1500&ssl=1)
Ash bed in Oligocene-Miocene sandstone of the Arikaree Group, Scotts Bluff National Monument, Nebraska 220916-69)
Download ImageBluffs and Great Plains, Nebraska
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2022/09/220916-57.jpg?w=1500&ssl=1)
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 Image
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