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SOME POINTERS:
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Waterfall and Wanapum basalt, Oregon (vertical)

North Falls at Silver Falls State Park, Oregon. It spills over a flow of Wanapum Basalt. The alcove behind the falls is eroded along recessive sedimentary rocks that lie between the Wanapum and underlying Grande Ronde Basalt. (150119-24)
Download ImageFolded ribbon chert and sea stacks, Oregon

Folded ribbon chert and sea stacks at Rainbow Rock, southern Oregon coast (111207-16)
Download ImageFolded ribbon chert and sea stacks, Oregon

Folded ribbon chert and sea stacks at Rainbow Rock, southern Oregon coast (111207-4)
Download ImageCoffee Pot cinder cone, Oregon (Pan)

Panorama photo of Coffee Pot cinder cone, Jordan Craters Lava field, eastern Oregon (IP2006-7351)
Download ImageCoffee Pot cinder cone, Oregon

Side of Coffee Pot cinder cone, Jordan Craters Lava field, eastern Oregon (IP2006-7349)
Download Imageplunging anticline, SW Montana

Aerial view of plunging anticline in Mesozoic rock, SW Montana (D200609-6)
Download ImageAnticline-syncline pair, SW Montana

Anticline-syncline pair in Cretaceous limestone, SW Montana (D200609-4)
Download ImageSuccor Creek and rhyolite cliffs, Oregon

Succor Creek, Oregon. The canyon is framed by cliffs of Miocene McIntrye Rhyolite (200612-113)
Download ImageRhyolite dike intruding tuff, Oregon

Rhyolite dike intruding Tuff of Leslie Gult, Oregon. Note the horizontal cooling fractures in the dike (200612-107)
Download ImageRhyolite dike intruding tuff, Oregon

Rhyolite dike intruding Tuff of Leslie Gult, Oregon. Note the horizontal cooling fractures in the dike (200612-104)
Download ImageHorizontal cooling fractures in dike, Oregon

Horizontal cooling fractures in rhyolite dike, Leslie Gulch, Oregon. (200612-103)
Download ImageLIthophysae in rhyolite, Oregon (vertical)

LIthophysae in Miocene McIntyre rhyolite, Succor Creek, Oregon . Mineralization of the lithophysae forms the Oregon thundereggs. (200612-96)
Download ImageSuccor Creek, Oregon

Succor Creek, Oregon, framed by cliffs of Miocene McIntrye Rhyolite (200612-94)
Download ImageTuff of Leslie Gulch, Rooster Comb, Oregon

Tuff of Leslie Gulch forming Rooster Comb and Owyhee Reservoir, Oregon (200612-72)
Download ImageHorizontal cooling fractures in dike, Oregon

Horizontal cooling fractures in rhyolite dike, Leslie Gulch, Oregon. (200612-54)
Download ImageWelded tuff, Oregon (vertical)

15.8 million year Welded Tuff of Leslie Gulch, Oregon (200612-50)
Download ImageWelded tuff, Oregon

15.8 million year Welded Tuff of Leslie Gulch, Oregon (200612-48)
Download ImageWelded tuff, Oregon

15.8 million year Welded Tuff of Leslie Gulch, Oregon (200612-47)
Download ImageWelded tuff, Oregon (vertical)

15.8 million year Welded Tuff of Leslie Gulch, Oregon (200612-17)
Download ImageLandslide scars and Idaho State Hwy 21

Landslide scars and Idaho State Hwy 21, west of Lowman, Idaho. (200611-130)
Download ImageKirkham Hot Springs, Idaho

Kirkham Hot Springs, on the Payette River (Idaho State Hwy 21), Idaho. (200611-125)
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