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Mt. Hood stratovolcano, Oregon (vertical)
Aerial view of Mount Hood stratovolcano, Oregon. Crater Rock, which intruded during the most recent eruptive period, forms the lava dome in the crater. (30-12699).
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Folded Banded Iron Formation
Proterozoic Banded Iron Formation, folded into asymmetric anticline (30-11555).
Download ImageDikes in caldera wall, Crater Lake
Dikes in caldera wall, Crater Lake National Park, Oregon. (30-11472)
Download ImageTalus deposit, Crater Lake, Oregon
Talus deposit from erosion of caldera walls, Crater Lake National Park, Oregon. (30-11413)
Download ImageJoint-controlled slot, Montana
Stream flowing through Joint-controlled slot, Sunrift Gorge, Glacier National Park, Montana. (30-10384)
Download ImageDike in caldera wall, Crater Lake (vertical)
Dike in caldera wall, Crater Lake National Park, Oregon. (30-11403)
Download ImageTalus Cones and Llao Rock, Crater Lake, OR
Talus cones and Llao Rock, Crater Lake caldera, Crater Lake National Park, Oregon. (30-11388)
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Research vessel on Crater Lake, OR (vertical)
Research boat on Crater Lake. Crater Lake National Park, Oregon.(30-11345)
Download ImageMolar tooth structure in dolomite
Molar tooth structure in Helena Dolomite, Glacier National Park, Montana. (30-1066).
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Crater Lake and Wizard Island, Oregon
Crater Lake and Wizard Island, a post-caldera andesitic cinder cone. Crater Lake National Park, Oregon. (30-11314)
Download ImageCrater Lake and Phantom Ship, Oregon
Crater Lake and Phantom Ship. Crater Lake National Park, Oregon. (30-11233)
Download ImageGlacial valley, Glacier NP, Montana
Glacial valley and paternoster lakes, Glacier National Park, Montana. (30-1063)
Download ImageCross-bedded oolitic limestone limestone (vertical)
Cross-bedded oolites in sandy limestone of Altyn LImestone of the Proterozoic Belt Supergroup, Montana. (30-10282)
Download ImageCross-bedded oolitic limestone limestone
Cross-bedded oolites in sandy limestone of Altyn LImestone of the Proterozoic Belt Supergroup, Montana. (30-10281)
Download Imageripplemarks in fine sandstone.
ripples in fine sandstone of Proterozoic Belt Supergroup, Montana. (30-10344)
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