Filters: Tags: Shenandoah National Park (X) > partyWithName: Reed, John Calvin , Jr. (X)
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Shenandoah National Park, Virginia. Mud-lump breccia in the outcrop along the Appalachian Trail at the north end of the base of Little Stony Man Cliffs. Lumps of hard red argillite stand out as knots on the weathered surface. Light-gray streaks are irregular wisps of silvery phyllite. Matrix is fine- grained schistose greenstone. Figure 13, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
photo print
Shenandoah National Park, Virginia. Blue Ridge, viewed from the west. The flat fertile valley floor (foreground) is underlain by limestone of the Paleozoic age capped by terrace gravel. The low wooded foothills (middle distance) are underlain by steeply dipping quartzite and shale of the Chilhowee Group. The main mass of the Blue Ridge is composed of granitic basement rocks, but the highest part of the ridge is capped by greenstone of the Catoctin Formation. Photo by U.S. National Park Service. Figure 1, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Virginia,
Shenandoah National Park, Virginia. Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Here, a zone of breccia and schistose greenstone marks the boundary between the second and third flows above the base of the Catoctin Formation. The outcrop is approximately 3 feet high. Figure 7, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Shenandoah National Park, Virginia,
Shenandoah National Park, Virginia. Columnar jointing in greenstone. Large column along the Appalachian Trail about 200 feet south of Little Stony Man parking area. The column is cut by cleavage which dips east, away from the observer. The segment of the coluiai above each cleavage plane is offset westward from the segment beneath as a result of movement during formation of the cleavage. Column is approximately 2 feet in diameter. Figure 9 (right), U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Formations,
National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike on Ridge Trail, Old Rag Mountain, about O.4 mile northeast of the summit. Wallrock is Old Rag Granite of Furcron (1934). Figure 15 (left), U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Page County, Virginia,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Shenandoah National Park, Virginia. Columnar jointing in greenstone. Small wavy columns at the top of the cliff above the Appalachian Trail about 0.15 mile north of Hawksbill Gap. Figure 9 (left), U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
photo print
Shenandoah National Park, Virginia. Sandstone dikes in greenstone. Outcrop is on the north side of Skyline Drive at mile 47.3 on the south side of Hawksbill Mountain. Sandstone (light gray) displays faint subhorizontal bedding. Greenstone (darker gray) displays a dark chloritic border at the edge of the dike. The knife is about 3 inches long. Figure 11, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
photo print
Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike at the west side of the north portal of Marys Rock Tunnel, mile 32.1, Skyline Drive. Wallrock is granodiorite. Figure 15 (right), U.S, Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: National Parks,
Page County, Virginia,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Shenandoah National Park, Virginia. Sawed slab of porphyritic greenstone. Slab is from the outcrop on the south side of Skyline Drive at mile 80.9, about 100 yards east of Big Run Overlook in the southern section of the park. Angular to slightly rounded phenocrysts of plagioclase (now albite) occur in the matrix of finer grained albite, chlorite, and epidote displaying relict basaltic fabric. The phenocrysts in this specimen are somewhat larger than those in the porphyritic flows in the Big Meadows-Stony Man Area, but the texture is typical. Specimen collected by Professor Ernst Cloos, The Johns Hopkins University. Photo by J.P. Owens. Figure 14, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Tags: Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
Specimens,
photo print
Shenandoah National Park, Virginia. Franklin Cliffs, viewed from Big Meadows Campground, showing the prominent cliffs marking the outcrops of the second and third flows above the base of the Catoctin Formation. Note the change in attitude of flows near the fault. Figure 5, U.S. Geological Survey Bulletin 1265.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Formations,
National Parks,
Photographers,
Reed, J.C. Collection,
Shenandoah National Park,
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