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Apparatus of the U.S.G.S. Hydraulic Laboratory on the campus of the University of California. no date.
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Yosemite National Park, California. Yosemite Falls and surrounding cliffs, viewed from the valley floor. Only the head of Lower Yosemite Fall is visible through the trees. Dark zones of vegetation crossing the cliffs on the left reveal narrow terraces developed along zones of sheared rock. Sparseness of vegetation in the intermediate spaces is indicative of the absence of joints in the rock. Circa 1913.
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Yosemite National Park, California. Bold exposure of unjointed Half Dome Granodiorite (in sun) capped by mostly well-jointed tonalite (in shade) making up Glacier Point. The contact between the two rock types angles upward to the left. Figure 38, U.S. Geological Survey Bulletin 1595.
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Northeastward from Granite Dome. The rock-basin lake is in granite. The visible parts of the ridges beyond are of volcanic rock. California. 1905.
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Yosemite National Park, California. Three-quarters profile view of Royal Arches, showing the inclination of rock sheets and in-curving of partings under the edge of the rock terrace, a feature characteristic of exfoliation. Half Dome in the background. Circa 1913.
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Sequoia National Park, California. Glacier polish, striae, and grooves above the head of Kern Canyon. The rock is aplite, which weathers more slowly than the coarser granite and, therefore, holds its glacial markings longer. Since being glaciated, the aplite has been somewhat disrupted into angular blocks by repeated frost action. Circa 1935. Figure 23, U.S. Geological Survey Professional paper 504-A.
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Album caption: San Joaquin River, California. No index card.
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Yosemite National Park, California. Glaciated floor and side of upper Merced Canyon. All the rock features shown are smoothed and polished by the ice. In few places in the world is glacier polish more abundant than here. The row of stones in the foreground serves to mark the trail across the otherwise featureless rock floor. Circa 1914. Plate 36, U.S. Geological Survey Professional paper 160.
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Yosemite National Park, California. Exfoliating granite on Lower Quarter Dome. This rock mass originally had angular edges and a sharp point, but these are now largely transformed into smooth curves of exfoliation. Circa 1913. Plate 48-C, U.S. Geological Survey Professional paper 160.
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Yosemite National Park, California. Glaciated rock between Mono Pass and Parker Pass. The direction of ice motion was from the foreground on the right toward the distance on the left. An angular cavity, due to the plucking of a block separated by joint planes, was modified by subsequent abrasion. The hill beyond is a spur of Mount Gibbs. 1903.
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Album caption: Desert reservoir strength ended by growth of young cottonwoods. California. Handwritten notes on album caption: ca. 1905 No index card available. Notes: Panorama with mwc00618. Pubished as plate X-B in U.S. Geological Survey. Water-supply Paper 225. 1909.
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Yosemite National Park, California. Kolana Rock and Hetch Hetchy Lake. September 14, 1936.
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Flowing oil well and oil reservoir at Maricopa. Photo by G.R. Davis, topographer. Bakerfield Quadrangle. Kern County, California. 1908.
Categories: Image; Tags: California, photo print
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Yosemite National Park, California. Vernal Fall at low water, showing the massive character of the rock. There is not a single parting in the 300-foot cliff. No notch is cut by the stream. The cliff recedes by the scaling off of huge vertical rock sheets. In the lower right corner is a fragment of the last rock sheet that broke off. Circa 1913.
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Yosemite National Park, California. Vernal Fall precipice at low water. In the foreground are characteristic current scoops developed in the massive rock. Beyond, a dark line of moss and grass reveals an incipient parting, developing parallel to the cliff face. Circa 1913.
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Death Valley National Park, California. Volcanic rocks and sediments derived from them form the front of the Black Mountains at Artist Drive. Photo by J.R. Stacy, circa 1960.
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Death Valley National Park, California. West distributary of Salt Creek where it crosses the smooth silty rock to the flood plain in Cottonball Basin. This channel is 32 feet wide and 1 foot deep. Much of the efflorescence on the channel upstream from the pool is mirabilite, the hydrous sodium sulfate. Circa 1960.
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Sequoia National Park, California. Down the canyon across one of the Hamilton Lakes, viewed from near the source of Hamilton Creek. Massive granite forms the impressive cliffs on the right and the rock barrier across which the lake has its outlet. In the center, on the distant mountain, is a well-formed avalanche chute. Photo by W.L. Huber, circa 1935. Figure 35, U.S. Geological Survey Professional paper 504-A.
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Yosemite National Park, California. Up Hetch Hetchy Valley from the trail to Lake Eleanor. Kolana Rock on the right. North Dome on the left. Circa 1914.
map background search result map search result map Clam-shell dredge at work building levee. California. no date. Apparatus of the U.S.G.S. Hydraulic Laboratory on the campus of the University of California. no date. West distributary of Salt Creek. Death Valley National Park, California. 1960. Glacier polish, striae, and grooves above the head of Kern Canyon. Sequoia National Park, California. 1935. Panorama. Desert reservoir strengthened by growth of young cottonwoods. California. circa 1905. San Joaquin River, California. 1920. Glacier polish, striae, and grooves above the head of Kern Canyon. Sequoia National Park, California. 1935. West distributary of Salt Creek. Death Valley National Park, California. 1960. Clam-shell dredge at work building levee. California. no date. Apparatus of the U.S.G.S. Hydraulic Laboratory on the campus of the University of California. no date. Panorama. Desert reservoir strengthened by growth of young cottonwoods. California. circa 1905. San Joaquin River, California. 1920.