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Triassic Palisades sill, New York
Cliff of Triassic diabase making up the Palisades Sill, with the Hudson River in the foreground, New York. Cliff spands the New York-New Jersey border. (250923-25)
Download ImageTriassic Palisades sill, New Jersey (vertical)
Cliff of Triassic diabase making up the Palisades Sill, New Jersey, (250923-22)
Download ImageTriassic Palisades sill, New Jersey
Cliff of Triassic diabase making up the Palisades Sill, New Jersey (250923-13)
Download ImageNorth Cascades, Washington
View into the crystalline core of the North Cascades, Washington. Mt. Redoubt is the prominent peak in the background (250820-8)
Download ImageMt. St. Helens crater, labeled
View into the crater of Mt. St. Helens, Washington. Notice the modern dacite dome in the rear center, the dark-colored Crater Glacier in the middle center, and the light-colored Pine Creek Dome on the left. For non-labeled image, find photo 250727-98. (250727-98MSHe)
Download ImageDrained marshland, San Francisco Bay, CA
Seal Slough and urbanization of drained marsh land, now prone to liquefaction. San Francisco Bay, California (250625-69)
Download ImageMiocene Monterey Formation, CA
Dipping strata of the Miocene Monterey Formation in southern California (240919-76)
Download ImageHerringbone crossbeds, Montana
Herringbone cross-stratification in Proterozoic Grinnell Formation, part of the Proterozoic Belt Supergroup, Glacier National Park, Montana (250716-25)
Download Image250716-148
Glacial cirque, tarn, and horn. Oldman Lake and Flinsch Peak, Glacier National Park, Montana (250716-148) erosion
Download ImageProterozoic stromatalite, Montana
Stromatalite in Proterozoic Helena Formation, Glacier National Park, Montana (250716-72)
Download ImageGlacially eroded valley, Glacier NP, Montana
View down Dry Fork, a U-shaped glacial valley in Glacier National Park, Montana (250716-154)
Download ImagePatterned ground, Glacier NP, Montana
Periglacial patterned ground, stone stripes, Glacier National Park, Montana (250716-108)
Download ImageBelt Supergroup, Glacier NP, Montana
Rising Wolf Mountain, capped by Proterozoic strata of the Empire and Helena Formations (Belt Supergroup) Glacier National Park, Montana (250716-87)
Download ImageMt. Adams stratovolcano, WA
Mt. Adams stratovolcano as seen from ash and pumice covered slopes of Mt. St. Helens, Washington
Download ImageActive fumaroles on domes of Mt. St. Helens, WA
Steam rising from vents on the 2004-2008 domes of Mt. St. Helens, Washington (250727-44)
Download ImageCrater Glacier, Mt. St. Helens, WA
Crater Glacier, Mt. St. Helens, Washington. The front of the glacier is dark colored because it is covered by rock. (250727-45)
Download ImageMt. St. Helens crater, Washington.
View into the crater of Mt. St. Helens, Washington. Notice the modern dacite dome in the rear center, the dark-colored Crater Glacier in the middle center, and the light-colored Pine Creek Dome on the left. See photo 250727-98MSHe for a labeled version of this photo. (250727-98)
Download ImageDebris flow channel and levee, Mt. St. Helens, WA
Debris flow channel and levee with Spirit Lake in background, Mt. St. Helens, Washington (250726-78)
Download ImageGlacier, pyroclastics, and dome, Mt. St. Helens, WA
Crater Glacier impinging on 1980 pyroclastic deposits with dacite dome of Pine Creek age (2.5-3Ka) in background. Black stripes in dome are basaltic dikes of the Castle Creek volcanic period (1.6-2.2Ka), Mt. St. Helens, Washington. (250726-50)
Download ImageLoowit Creek, Mt. St. Helens, WA
View up Loowit Creek into the crater of Mt. St. Helens, Washington. the white rock in the background is a dacite dome of Pine Creek Age. (250726-35)
Download ImageTuya and volcanic neck, Oregon
Hayrick Butte, a tuya (a flat-topped volcano that erupted through thick glacial ice) and Mt. Washington, an eroded volcanic neck in the HIgh Cascades of Oregon. (250618-66)
Download Image
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