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Yosemite National Park, California. Portion of the western slope of Mount Dana, showing tracks of avalanches which break the continuity of a forest of Murray pines. Altitude of mountain shoulder is 11,200 feet; of foreground, 9,700 feet.
Categories: Image;
Tags: Gilbert, G.K. Collection,
National Parks,
Photographers,
Yosemite National Park,
Yosemite National Park,
Yosemite National Park, California. Upper part of Lyell Canyon, which descends from right to left. On the left appears a rock terrace which slopes upstream. 1903. Photos ggk02102 and ggk02103 form a panorama.
Yosemite National Park, California. Front of Liberty Cap and Mount Broderick. Their sheer, hackly fronts were subjected to the quarrying action of the Merced Glacier.
Yosemite National Park, California. Double Rock, viewed from the plateau to the south. Immediately beyond them is the Grand Canyon of the Tuolumne River. Circa 1914.
Yosemite National Park, California. Vernal Fall, viewed from "Lady Franklin Rock." 1913.
Yosemite National Park, California. Southeast slope of the northeast spur of Mount Hoffman, showing a shallow type of Pleistocene glacial erosion in which the superficial rocks were somewhat uniformly excavated to a depth of about 200 feet. Circa 1907.
Yosemite National Park, California. Vertical panorama of Mount Watkins, viewed from Upper Quarter Dome. Mount Watkins is a gigantic monolith of Half Dome Granite, exposed by the excavation of Tenaya Canyon to a height of 3,000 feet. It constitutes another El Capitan. Its back forms one of the smoothly rounded rock waves of the billowy upland. Circa 1913.
Yosemite National Park, California. Edge of Vernal Fall precipice. A thick rock sheet is about to detach itself; several fragments of sheets are wedged in the crevice. Circa 1913.
Yosemite National Park, California. Glacial moraines in Yosemite Valley. Tioga-age recessional moraine exposed in a road cut below Cathedral Rock. Large boulder in the center is Cathedral Peak Granodiorite. Figure 74-B, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. Tenaya Lake and Tenaya Dome. The rock is granite. Circa 1907.
Yosemite National Park, California. The curving back of Half Dome is enveloped largely by a single, enormous shell. Its surface is not only striped with lichens, as are most cliffs in the Yosemite region, but it is fluted in places. The rock grains washed down from the summit have worn furrows in it several feet in depth. At the base are several imperfect arches produced by dropping off parts of shells. Circa 1913. Plate 50-A, U.S. Geological Survey Professional paper 160.
Yosemite National Park, California. Metamorphic rocks with relict sedimentary bedding. Highly contorted, as near Spotted Lakes. Photo by J.P. Lockwood. Figure 24-B, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: Huber, N.K. Collection,
Mariposa County, California,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. End of the spur between McClure Glacier and the next cirque north. The rock is massive granite. The terrace and cliff contouring the spur are the results of glacial erosion. In the foreground is a rock-basin lake. Beyond the spur are moraines built by the glacier formerly occupying the cirque. 1903.
Categories: Image;
Tags: California,
Glaciers,
McClure glacier,
National parks,
Yosemite National Park,
Yosemite National Park, California. El Capitan Granite, freshly broken rock surface. Figure 10-A, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. Tuolumne Canyon. The view is northwest and downstream. The camera stands on glaciated rock above an abrupt descent. In middle ground is the sill of a second leap; just beyond it on the right, the tributary canyon of Return Creek. 1903.
Yosemite National Park, California. Imprints on the rock left by passing debris-laden ice. Glacial polish and striation (lower right). Crescentric gouges or percussion marks are visible in the center; horns of the crescents point up-glacier. Chatter marks consist of a group of crescent shaped cracks pointing down-glacier, but generally they do not form gouges. Figure 55-A, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. Feldspar crystal (center) in granite, retaining glacial polish and striae, on Tuolumne-Merced Divide at an altitude of 9,900 feet, 1.5 miles northwest of Cathedral Peak..
These snag (dead tree) fall data were collected as part of long term forest dynamics data. Tree fall data were collected non-systematically as text comments until 2013, after which explicit snag fall data were collected on an annual basis. This particular dataset includes data from 23 plots in old-growth mixed conifer and montane conifer forests in Sequoia-Kings Canyon and Yosemite National Parks. The plots range in size from 0.9 ha to 2.5 ha and were established from 1982 to 2001. We used demography plot data through 2021 (collected before the extensive KNP Complex wildfire burned many of the plots). Before 2021, four of the 23 plots had experienced relatively recent prescribed burns or wildfires. When established,...
Categories: Data;
Tags: California,
Forestry,
Sequoia National Park,
Sierra Nevada,
USGS Science Data Catalog (SDC),
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