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Skolithos, a trace fossil.
Skolithos tubes in Cambrian quartzite, Mojave Desert. The rock unit is the Zabriskie Quartzite; bedding dips to the left, Skolithos, which are vertical worm(?) burrows are perpendicular to bedding. Photo is about 0.5 meters across. (IMG_1310)
Download ImageTilted beds of conglomerate–hammer for scale
Tilted beds of conglomerate, SE California. (IMG_1277)
Download ImageTilted beds of conglomerate, SE California.
Tilted beds of conglomerate, SE California. (IMG_1276)
Download ImageDeath Valley salt pan (vertical)
Salt flats of Death Valley, California. The polygons are formed by precipitation of new salt in shrinkage cracks. (IMG_1241)
Download ImageDeath Valley salt pan (vertical)
Salt flats of Death Valley, California. The polygons are formed by precipitation of new salt in shrinkage cracks. (IMG_1258)
Download ImageAthabasca Glacier in retreat
Monument shows location of the terminus of the Athabasca Glacier in 1935. Jasper National Park, Alberta, Canada.
Download ImageVentifact and deflation hollow in sand
Ventifact and deflation hollow in sand, Mojave Desert, California (IMG_1209)
Download ImageIntersecting salt-filled dessication cracks
Intersecting salt-filled dessication cracks, Death Valley National Park, California. (IMG_1218)
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Sidewalk offset by creep, Hollister, California
Sidewalk offset by creep (right-lateral) on Calaveras fault, Hollister, California. (IMG_0317)
Download ImageGlacial erratic, Washington
Glacial erratic: granitic boulder surrounded by shale bedrock, San Juan Islands, Washington.
Download ImageGlacial till, Sierra Nevada, California
This unsorted mixture of unstratified rock was deposited directly by a glacier. (Gl-27)
Download ImageGlacial moraine, Sierra Nevada
Aerial view of glacial moraine near Convict Lake in the Sierra Nevada, California. Photo shows terminal, lateral, and recessional moraines. (Gl-29)
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Glacial cirque, tarn, and headwall, Colorado.
Glacial cirque, tarn, and headwall, Longs Peak, Rocky Mountain National Park, Colorado. (Gl-22)
Download ImageLateral moraine, Kyrgyzstan
Lateral moraine on Aksai glacier, Tien Shan Mtns, Kyrgyzstan (Gl-28)
Download ImageCirque of Grinnell Glacier, Montana
Cirque of Grinnell Glacier, Glacier National Park, Montana. Bedrock is sedimentary rock of Proterozoic Belt Supergroup. (Gl-25)
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Lembert Dome, a Roche Moutonee
Tuolumne Meadows, Yosemite National Park, California. (Gl-26)
Download ImageGlacier terminus: Carbon Glacier, WA.
Glacier terminus: Carbon Glacier, Mount Rainier National Park, Washington. (Gl-15).
Download ImageGlacial polish and striations
Glacial polish and striations on granodiorite, Yosemity National Park, California. (Gl-24)
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