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Sequoia National Park, California. Basalt columns at the front of a lava cascade near Golden Trout Creek. 1936.
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Sequoia National Park, California. Saddle east of Tower Rock, on the east rim of Kern Canyon. This saddle was invaded by the Kern glacier of El Portal Stage. The crags and boulders, which are 10 to 20 feet high, give evidence of the post-El Portal weathering that here has destroyed all traces of glaciation. Circa 1935. Figure 29, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Alta Peak (11,211 feet). The summit is composed of frost-shattered remnants of exfoliation shells. Formerly the shells extended toward the left in a descending curve outlining a dome, but the excavation of a cirque by a small glacier has pared away the north side of the dome, thereby giving the summit the unsymmetrical profile. The upper part of the cirque wall, which is several hundred feet high, is visible in the lower left corner. Photo by J.C. Patten, 1935. Figure 30, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. Photo by J.C. Patten, 1935.
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Sequoia National Park, California. Spectacular summits south of Hamilton Lakes. They have been produced by glacial sculpturing in massive exfoliating granite. Circa 1935. Figure 34, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Glacial boulder of El Portal Stage resting on a platform overlooking the Big Arroyo. Weathering has produced a bread crust effect on the sides and weather pits 6 to 15 inches deep on the top surface. Circa 1935. Figure 27, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Kern Canyon, viewed from Rattlesnake Point. Photograph by L. Moe, circa 1935. Photos mfe01394 and mfe01395 form a panorama.
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Sequoia National Park, California. East end of Tunnel Rock fly road construction. Circa 1935.
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Sequoia National Park, California. Sheer cliffs 2,000 to 2,400 feet high, north of Hamilton Lake (just out of view). At the lower right is a stretch of the trail leading to Kaweah Gap. The cliffs owe their remarkable columnar forms mainly to a vertically sheeted structure, which has permitted the incision of sharp gullies along narrow zones of intense fracturing. The erosional work has been done by avalanches of snow and by water from rain and snow carrying loosened rock grains. The white cliff on the right is composed of wholly undivided massive granite.
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Sequoia National Park, California. Northwest from the main Sierra crest across the upper Kern Basin to the Great Western Divide. An ancient erosion surface is preserved on the summits of Mount Whitney (foreground) and Mount Young, the adjacent peak. Other, younger erosion surfaces form the plateaus bordering the Kern Canyon. Numerous cirques scallop the main Sierra crest and the Great Western Divide. Photo by R. Curtis. Figure 10, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Concrete steps have been built along the broken edge of the curving top shell of Moro Rock. This shell is already cracked in a number of places, and some of the fragments have slid a short distance as a result of gravity and pressure exerted by ice forming in the fractures. Circa 1935.
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Sequoia National Park, California. Glacial outwash, dating perhaps from the Glacier Point Stage, exposed in a road cut on the Generals Highway above Camp Potwisha. This material was brought down by the Kaweah River from the glacier at its head and now forms an inconspicuous terrace on the side of the canyon, about 200 feet above the riverbed. Photo by J.C. Patten, circa 1935. Figure 32, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Rock barrier at the lower end of Hamilton Lake. The barrier consists of essentially unfractured, massive granite which the glacier could not quarry away block by block, but could only grind and polish.
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These data were collected to quantify oak mortality during the 2014-2017 drought. 30 tenth hectare drought plots were established throughout the blue oak woodland of Sequoia National Park. Information on species, size, and mortality were collected for all standing trees in each plot. In addition, two long-term 2.25 ha plots were established, in which the same data were collected. These data are associated with the following publication: Das, A.J., Ampersee, N.J., Pfaff, A.H., Stephenson, N.L., Swiecki, T.J., Bernhardt, E.A., Haggerty, P.K. and Nydick, K.R., 2020. Tree mortality in blue oak woodland during extreme drought in Sequoia National Park, California. Madroño, 66(4), pp.164-175.
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Sequoia National Park, California. From the trail to Mount Whitney, showing the sheeted structure of the granite and the partly frozen tarn in the distance. Photo by K. Flewelling, 1936.
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Sequoia National Park, California. Mount Hitchcock (center), viewed from the Whitney Trail across upper Whitney Canyon and Hitchcock Lake (foreground). Zones of fracturing in the floor of the canyon have controlled the erosive action of the glacier. Lakes and snowdrifts mark the depressions quarried out in these zones. The intermediate humps, composed of sparsely fractured rock, have been subject chiefly to the slower process of grinding. Except for the accumulation of rock debris at the base of Mount Hitchcock, this part of the canyon has undergone only insignificant changes since the disappearance of the glacier. Photo by K. Flewelling. Figure 48, U.S. Geological Survey Professional paper 504-A.
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Sequoia National Park, California. Moraine Lake, on Chagoopa Plateau, at sunrise. This is one of the few wholly moraine-impounded lakes in the Kern Basin. The little valley which the lake occupies was invaded by a side lobe of the Big Arroyo Glacier in the latest glacial stage. The lobe built several concentric moraine loops during the halts or re-advances that interrupted its recession. The last and smallest of these moraine loops encircles the lower end of the lake. The water seeps out through the morainal embankment. Circa 1935.
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Sequoia National Park, California. The most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. This chute is carved in massive exfoliating granite and terminates at the brink of the glacial U-shaped canyon below. The downward narrowing of the chute is explained by the protection given to the lower part of the chute by a snow cone on the surface of the glacier which lays in the canyon. Meltwater cascading from the snow in the chute has carved a gulch beneath it. The scales on the granite in the chute are produced by exfoliation and are purely superficial features. 1936.
map background search result map search result map Sequoia National Park, California. Alta Peak (11,211 feet). The summit is composed of frost-shattered remnants of exfoliation shells. Sequoia National Park, California. Northwest from the main Sierra crest across the upper Kern Basin to the Great Western Divide. Sequoia National Park, California. Glacial boulder of El Portal Stage resting on a platform overlooking the Big Arroyo. Sequoia National Park, California. Glacial outwash, dating perhaps from the Glacier Point Stage, exposed in a road cut on the Generals Highway above Camp Potwisha. Sheer cliffs 2,000 to 2,400 feet high, north of Hamilton Lake (just out of view). Sequoia National Park, California. No Date. Rock barrier at the lower end of Hamilton Lake. Sequoia National Park, Visalia, California. 1935. Sequoia National Park, California. Basalt columns at the front of a lava cascade near Golden Trout Creek. 1936. Sequoia National Park, California. Moraine Lake, on Chagoopa Plateau, at sunrise. This is one of the few wholly moraine-impounded lakes in the Kern Basin. Solution cavities in granite at Sunset Rock. Sequoia National Park, California. 1935. Hospital Rock. Sequoia National Park, California. Circa 1935. Concrete steps have been built along the broken edge of the curving top shell of Moro Rock. Sequoia National Park, California. 1935. Avalanche chute. Sequoia National Park, California. 1936. Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. East end of Tunnel Rock fly road construction. Sequoia National Park, California. 1935. Sequoia National Park, California. Kern Canyon, viewed from Rattlesnake Point. Photograph by L. Sequoia National Park, California. Spectacular summits south of Hamilton Lakes. They have been produced by glacial sculpturing in massive exfoliating granite. Tree mortality in blue oak woodlands in Sequoia National Park during extreme drought Tree mortality in blue oak woodlands in Sequoia National Park during extreme drought Sequoia National Park, California. Alta Peak (11,211 feet). The summit is composed of frost-shattered remnants of exfoliation shells. Sequoia National Park, California. Northwest from the main Sierra crest across the upper Kern Basin to the Great Western Divide. Sequoia National Park, California. Glacial boulder of El Portal Stage resting on a platform overlooking the Big Arroyo. Sequoia National Park, California. Glacial outwash, dating perhaps from the Glacier Point Stage, exposed in a road cut on the Generals Highway above Camp Potwisha. Sheer cliffs 2,000 to 2,400 feet high, north of Hamilton Lake (just out of view). Sequoia National Park, California. No Date. Rock barrier at the lower end of Hamilton Lake. Sequoia National Park, Visalia, California. 1935. Sequoia National Park, California. Basalt columns at the front of a lava cascade near Golden Trout Creek. 1936. Sequoia National Park, California. Moraine Lake, on Chagoopa Plateau, at sunrise. This is one of the few wholly moraine-impounded lakes in the Kern Basin. Solution cavities in granite at Sunset Rock. Sequoia National Park, California. 1935. Hospital Rock. Sequoia National Park, California. Circa 1935. Concrete steps have been built along the broken edge of the curving top shell of Moro Rock. Sequoia National Park, California. 1935. Avalanche chute. Sequoia National Park, California. 1936. Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. East end of Tunnel Rock fly road construction. Sequoia National Park, California. 1935. Sequoia National Park, California. Kern Canyon, viewed from Rattlesnake Point. Photograph by L. Sequoia National Park, California. Spectacular summits south of Hamilton Lakes. They have been produced by glacial sculpturing in massive exfoliating granite.