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Filters: Tags: California (X) > Date Range: {"choice":"year"} (X) > Categories: Image (X) > partyWithName: Huber, N. King (X)

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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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Yosemite National Park, California. Rockfall of blocks the size of small houses temporarily closed the El Portal Road east of Arch Rock Entrance Station in 1982 until a way could be blasted through the debris. Figure 49, U.S. Geological Survey Bulletin 1595.
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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.
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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.