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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.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park Collection,
Yosemite National Park, California. Perched erratic deposited on the ridge west of Upper Yosemite Fall during a pre-Tahoe glaciation. Pedestal height of 5 feet indicates the amount of rock weathered away since the boulder was dropped by the ice. Photo by U.S. National Park Service. Figure 66, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. Potholes angling up the side of Pothole Dome on the west side of Tuolumne Meadows. Bowl-shaped potholes are carved into the rock by the grinding action of stones whirled around and kept in motion by the force of a stream in a given spot. Here, the stream flowed into a tunnel beneath the ice that covered this area during the Tioga glaciation. Figure 71, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks On Isle Royale: pegmatite from the differentiated zone of the Greenstone Flow on the east end of Passage Island. This rock has a texture in which all of the minerals, especially the plagioclase, are larger when compared with those in most of the other rock types; the elongate plagioclase laths give the rock a matted appearance. Circa 1971. Figure 4-E, U.S. Geological Survey Professional paper 754-C; Figure 12-E, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
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Isle Royale National Park,
Keweenaw County, Michigan,
National Parks,
Photographers,
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.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park,
Yosemite National Park, California. Imprints on the rock left by passing debris-laden ice. Glacial polish and striations. Polished surface layer flakes off, and this evidence of glaciation gradually disappears. This excellent and accessible exposure is at the foot of Polly Dome along Tioga Road on the north side of Tenaya Lake. Figure 55-B, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park Collection,
Isle Royale National Park, Michigan. Zone of spheroidal weathering in a basalt lava flow. This zone of partly decomposed rock escaped removal by glacial erosion because of its protected location. Circa 1971. Figure 7, U.S. Geological Survey Professional paper 754-A.
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Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
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Isle Royale National Park,
Michigan,
National parks,
Photographers,
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: trap from the Minong Flow on the west end of Isle Royale. Circa 1971. Figure 4-F, U.S. Geological Survey Professional paper 754-C; Figure 12-F, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Huber, N.K. Collection,
Isle Royale National Park,
Keweenaw County, Michigan,
Photographers,
photo print
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: typical ophite, beach pebble from Mott Island. Circa 1971. Figure 4-A, U.S. Geological Survey Professional paper 754-C; Figure 12-A, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Huber, N.K. Collection,
Isle Royale National Park,
Keweenaw County, Michigan,
Photographers,
photo print
Yosemite National Park, California. Dike of light-colored, fine-grained aplite crosscutting granodiorite. Aplite is a silica-rich rock composed chiefly of quartz and potassium feldspar. Figure 13, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park Collection,
Yosemite National Park, California. El Capitan Granite. Rock surface chemically etched and stained to differentiate potassium feldspar (orange- yellow), plagioclase (red), and quartz (uncolored). Figure 10-B, U.S. Geological Survey Bulletin 1595.
Categories: Image;
Tags: California,
Huber, N.K. Collection,
National parks,
Photographers,
Yosemite National Park Collection,
Porphyritic texture in Cathedral Peak Granodiorite, with potassium feldspar phenocrysts much larger than the other minerals in the rock matrix. Yosemite National Park. California. n.d. Published as figure 14 in U.S. Geological Survey. Bulletin 1595. 1987.
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Tags: California,
Huber, N.K. Collection,
Photographers,
Yosemite National Park Collection,
color transparency (slides)
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,
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: fine-grained porphyrite from the Scoville Point Flow on the south side of North Government Island. This variety has small, blocky millimeter-sized plagioclase crystals rather uniformly distributed through the groundmass. Circa 1971. Figure 4-B, U.S. Geological Survey Professional paper 754-C; Figure 12-B, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Huber, N.K. Collection,
Isle Royale National Park,
Keweenaw County, Michigan,
Photographers,
photo print
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,
Characteristic textures of volcanic rocks on Isle Royale. Isle Royale National Park, Michigan. 1971.
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: coarse porphyrite from the Huginnin Flow on the shoreline just west of Huginnin Cove. This variety has larger, tabular-shaped crystals more sparsely distributed in the rock and commonly occurring in clots; the large crystals are often as much as 2 centimeters long. Circa 1971. Figure 4-D, U.S. Geological Survey Professional paper 754-C; Figure 12-D, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Huber, N.K. Collection,
Isle Royale National Park,
Keweenaw County, Michigan,
Photographers,
photo print
Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: fine-grained porphyrite, tending toward glomeroporphyrite, from the Tobin Harbor Flow on the south side of Porter Island. Circa 1971. Figure 4-C, U.S. Geological Survey Professional paper 754-C; Figure 12-C, U.S. Geological Survey Bulletin 1309.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Huber, N.K. Collection,
Isle Royale National Park,
Keweenaw County, Michigan,
Photographers,
photo print
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. 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,
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