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Section along Cajon Creek, near junction with Lone Pine Canyon, near south 1/4 corner sec. 12, T. 2 N., R. 6 W., showing contact between old alluvium and underlying metamorphic rocks. San Bernardino County, California. October 18, 1919.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Photographers,
San Bernardino County, California,
Thompson, D.G. Collection,
photo print
The Castle Rock in Boulder Canyon. The canyon is about 17 miles in length, cutting deep down through the metamorphic rocks of the foothills, so that in some places the sides of the canyon rise up nearly 3,000 feet above its bed. Boulder County, Colorado. 1873.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Boulder County, Colorado,
Four Great Surveys of the West,
Jackson, W.H. Collection,
Photographers,
photo print
Colorado National Monument, Colorado. Ladder Creek Monocline and Redlands Fault. View is northwest from a point near Little Park Road east of the monument. No Thoroughfare Canyon in the foreground, which is bordered on the left by northeastward-dipping beds of Wingate Sandstone at the northwest end of Ladder Creek Monocline. Old Serpents Trail, the lower part of which is barely visible, ascends this dipping block of rock. The dark Proterozoic rocks form the flat-topped bluff on the right and are exposed by the Redlands Fault which lies just above the sharply upturned remnants of the Wingate Sandstone. 1976. Figure 29, U.S. Geological Survey Bulletin 1508.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Colorado,
Colorado National Monument,
Lohman, S.W. Collection,
National Parks,
Photographers,
Eight extinguishing powders KC1, were tested on five types of diffusion flames. The effect of flame temperature on the inhibition efficiency was investigated by varying the oxygen index of the flame supporting atmosphere. In addition a spectrographic investigation of powder - flame dissociation products was carried out on the methane /air /ABC (NH4H2PO4) flame. Dissociation products for this flame included PO, PH, NH, and Na. It is concluded that the main factor to be considered in the efficiency of the powder is the flame temperature. Purple K (KHCO3) was typically inefficient in low temperature flames and very efficient in high temperature flames. On the other hand, ABC . (NH4H2PO4) was found to lose its efficiency...
Tags: Coal
As part of a cooperative project during 1986 and 1987, personnel from the U.S. Bureau of Mines and State of Alaska Division of Geological and Geophysical Surveys studied the mineral development potential of the Chilkat Peninsula and Islands, Alaska, as part of the larger Juneau Mining District study. About 4/5 of the area is within the Alaska State Chilkat and Chilkat Islands State Parks and not open to mineral entry. This study located four new (or previously unreported) gold- copper prospects. One of these, the Road Cut prospect, was examined by trenching, drilling and geophysics. While sufficient grades and tonnages were not delineated by this work to constitute an economic deposit, they are sufficient to encourage...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Chilkat Peninsula & Islands, Alaska,
Copper,
Gold
Uniaxial testing was performed on coal specimens to determine the time - dependent response. The testing was carried out on coal from six mine sites throughout the Western United States and Pennsylvania. Testing configurations were varied to allow analysis of moisture dependency, stress level and specimen orientation. Several theories were presented for the behavior of coal due to moisture diffusion. Experimental results showed the correlation between the theories and the actual material response. Coal deformation was found to be highly dependent on the moisture level of the testing environment. Moisture migration causes drying and shrinkage which lead to progressive degradation of the material. The coal tested...
Tags: Coal
Hosselkus limestone at top of Brock Mountain. Shasta County, California. 1902.
Head of east fork of Rock Creek. Alaska. 1913.
An environmental assessment or impact statement for onshore waste disposal under the National Environmental Policy Act is expected to occur with the development of commercial deep seabed 1 mining. An environmental assessment was conducted in order that testing and refinement of nodule waste disposal techniques can be completed prior to 1988, when commercial seabed mining can begin under U.S. legislation. Within this study three classes of process and four classes of waste i disposal technique were 1 identified, and five sites were selected as representative of first -generation nodule operations. Each realistic site /process /disposal technique combination was compared against potential effects to determine important...
Tags: Manganese
The mechanical properties of coal are often represented by the orthotropic material model, which consists of nine elastic constants. I. The material symmetries involved are found in coal primarily because of the natural process by which it was formed. . In this thesis the material properties of five U.S. coals, as obtained from cubical testing, are examined, using as a basis for comparison the assumption of the orthotropic material model. An analysis is performed on each set of coal .material data in order to examine its conformability.to other, less complex material models, these being the transversely isotropic model consisting of five elastic constants and the isotropic model consisting of two elastic constants....
Tags: Coal
Cores of coal measure rocks from five mines across the U.S. were tested for mechanical, index and mineralogic properties. About 600 samples were tested to determine 15 mechanical property parameters, 7 index parameters and 30 geologic parameters. The results were analyzed for their statistical distributions, and bivariate and multivariate, linear and non -linear correlations were attempted for these groups of parameters. Significant correlations were found for some of the parameters. On the basis of these statistics, predictive models are postulated for the mechanical properties on the basis of index and geologic parameters.
Tags: Coal
Album caption: Devils Gate Bridge. The most attractive feature of the canyon is the roar of the waters of the Weber as they roll over the immense masses of rock in its bed, with the rush and tumult of a mountain torrent. For 4 miles we are enclosed with nearly perpendicular walls of gneiss, 2,000 feet in height, forming the central portion of the Wasatch Mountains; the river rushing through it at right angles. The rocks are beautifully banded everywhere. There are also coarse aggregations of quartz and feldspar all along the sides of this channel; and high up on the steep mountain flanks are vast deposits of boulders and fine sand. Weber County, Utah. 1869. Handwritten notes on album caption: None Index card:...
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Four Great Surveys of the West,
Jackson, W.H. Collection,
Photographers,
Weber County, Utah,
photo print
Peru Earthquake May 31, 1970. Field west of the Rio Shacsha that was pockmarked by boulders hurled cross the Rio Shacsha valley. Most of the rocks are projectiles derived from the Huascaran debris avalanche. June-July 1970.
Lake beds of tuffaceous sandstone (Humboldt formation, Pliocene), Knoll Creek area, looking north-northeast, nearly up the valley; H.D. Range, chiefly Paleozoic sedimentary rocks, in right background. Elko County, Nevada. 1910. Plate 16-B in U.S. Geological Survey. Bulletin 497. 1912.
U.S. Geological Survey river boat moored in eddy on east side of upper entrance to Fort Hamlin-Rampart Canyon. Note rock outcrops of "Lower Mississippian Rampart Group" on west bank. Rock is diabase, chert, and serpentine-rich rocks. Yukon Flats district, Yukon region, Alaska. September 6, 1949.
Categories: Image;
Tags: Lower Mississippian Rampart Group,
Yukon Flats district, Yukon region, Alaska,
photo print
Typed information accompanying contact prints: Roll #7 June 7, 1980 -- Afternoon Frame A# 10. South Fork Toutle River L:W. Steep flow scan in foreground 11. West Ridge survey point at CP. L:E 12. West Ridge survey point at L:NE 13. South fork Toutle and saddle to Castle Creek, L:NW 14. Cliffs at northeast end of Johnston amphitheatre, L:SE 15. Looking south at the crater rampart 16. Erosion near the head of the South Fork Toutle River 17. Erosion near the head of South Fork Toutle River 18. Erosion near the head of South Fork Toutle River Photos of Mount St. Helens area, June 4 to 11,1980 taken by Hugh H. Kieffer, many from helicopter using Honeywell Pentax 6X7 (70 mm film), 105 mm lense. Abbreviations...
Categories: Image;
Tags: Kieffer, H.H. Collection,
Mount St. Helens Collection,
Photographers,
Volcanoes,
Washington (WA),
Colorado National Monument, Colorado. Fruita Canyon, looking northeast from a point on Rim Rock Drive above the head of the canyon. Dark Proterozoic rocks floor the canyon, above which are the slopes of the red Chinle Formation and the cliffs of Wingate Sandstone capped by the lower resistant beds of the Kayenta Formation. Beyond the Grand Valley are the dark Book Cliffs and the more distant, light-colored Roan Cliffs. May 28, 1970. Figure 45, U.S. Geological Survey Bulletin 1508.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Colorado,
Colorado National Monument,
Lohman, S.W. Collection,
National Parks,
Photographers,
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