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Banded gneiss
Banded gneiss –high grade metamorphic rock from a likely sedimentary protolith. Geologist is about 1 meter tall. (19L97-19)
Download ImageButtress unconformity, N Arizona
Buttress unconformity between alluvial fan gravels and basement gneiss andn schist, northern Arizona (9OtR97-339)
Download ImageShiprock, New Mexico
Shiprock, an eroded volcanic neck of lamprohyre (minette), New Mexico (9OtR-185)
Download ImageDike at Shiprock, New Mexico (vertical)
Lamprophyre (minette) dike at Shiprock, New Mexico (9OtR90-183)
Download ImageFault scarp and Borah Peak, Idaho
Fault scarp from the 1983 M6.9 Borah Peak earthquake, Idaho (OtR-142)
Download ImageBig Obsidian Flow, Newberry Caldera, Oregon
Aerial view of Big Obsidian Flow, a rhyolite that erupted only 1300 years ago. Newberry Caldera, Oregon. (9A99-73D)
Download ImageGlacial moraines and Sierra Nevada, CA
Aerial view of Grant Lake, California, a lake dammed by a glacial moraine (9A91N-24)
Download ImageColorado National Mon, CO (vertical)
View northward over tower and cliffs of Wingate Sandstone, Colorado National Monument, Colorado. In the middle ground, you can see the monocline that defines the front of the range. (6CPT82-41)
Download ImageMonocline, Colorado National Monument
Cliffs of folded Wingate Sandstone in monocline at Colorado National Monument (6CNM89-4)
Download ImageColorado National Monument, CO
View northward over tower and cliffs of Wingate Sandstone, Colorado National Monument, Colorado. In the middle ground, you can see the monocline that defines the front of the range. (6CNM14)
Download ImageMonocline, Colorado National Monument
Cliffs of folded Wingate Sandstone in monocline at Colorado National Monument (6CNM-7)
Download ImageBoudinage of pegmatite in marble
Boudinage of pegmatite in calc-silicate marble (5Side-30)
Download ImageBasement tower in Curecanti Nat Rec Area, CO
Tower, eroded from crystalline basement rock (gneiss) in Curecanti National Recreation Area, Colorado (4BC-14)
Download ImagePassive folds developed in oil screen on water.
Passive folds developed in oil screen on water. (IP20-6889)
Download ImageCape Meares, Oregon
Aerial view of Cape Meares, Oregon, enshrouded by clouds. The headland, the one behind it, and the seastacks, consist of flows of the Columbia River Basalt Group. Netarts Bay and Spit lie in the background. (100723-124)
Download ImageCoastal Sand Dunes, Oregon
Aerial view of large transverse coastal sand dunes, Oregon (9A2K-46)
Download ImageBlack Canyon of the Gunnison, Colorado
Granitic dikes in wall of deep gorge, Black Canyon of the Gunnison National Park, Colorado (170402-49)
Download ImageBlack Canyon of the Gunnison (Vertical)
Granitic dikes in wall of deep gorge, Black Canyon of the Gunnison National Park, Colorado (170402-47)
Download ImagePothole, carved in granitic rock (square)
Pothole, carved by water erosion of granitic rock along Roaring Fork River, Colorado (160822-69)
Download ImageRoaring Fork River, and granitic rock, Colorado
Erosion of granitic rock in channel of Roaring Fork River, Colorado. (160822-65)
Download ImageRoaring Fork River, Colorado, (Vertical)
Erosion of granitic rock in channel of Roaring Fork River, Colorado. (160822-62)
Download Image
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