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Page 4648, results 116176 - 116200

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The metal oxide fraction of pelagic sediment in the equatorial North Pacific Ocean: A source of metals in ferromanganese nodules
D.Z. Piper
1988, Geochimica et Cosmochimica Acta (52) 2127-2145
Pelagic sediment recovered at DOMES Site A in the equatorial North Pacific (151°W, 9° 15′N) consists of a surface homogeneous layer, approximately 10 cm thick, overlying a strongly mottled layer that is lighter in color. The radiolarian composition of both units is Quaternary. In areas where this sediment was only...
Sr and Nd isotopic variations in ferromanganese crusts from the Central Pacific: Implications for age and source provenance
K. Futa, Z. E. Peterman, J.R. Hein
1988, Geochimica et Cosmochimica Acta (52) 2229-2233
Isotopic analyses of two hydrogenetic ferromanganese (Fe-Mn) crusts from volcanic edifices in the central Pacific Ocean reveal systematic variations in 87Sr86Sr">87Sr86Sr and 143Nd144Nd">143Nd144Nd, with both ratios decreasing as a function of depth into the Fe-Mn crusts. Leaching experiments suggest that Sr...
Effects of kelp forest removal on associated fish assemblages in central California
James L. Bodkin
1988, Journal of Experimental Marine Biology and Ecology (117) 227-238
Visual surveys along subtidal belt transects were used to compare fish assemblages on an experimental and a control site before and after the removal of a canopy-forming kelp forest. The giant kelp Macrocystis pyrifera (L.) C.A. Agardh was removed at the holdfast from ≈ 1 ha of high relief structurally complex rock...
Hydrologic conditions at the Idaho National Engineering Laboratory, 1982 to 1985
J. R. Pittman, P. R. Fischer, R. G. Jensen
1988, Water-Resources Investigations Report 89-4008
Aqueous chemical and radioactive wastes discharged since 1952 to unlined ponds and wells at the INEL (Idaho National Engineering Laboratory) have affected water quality in perched groundwater zones and in the Snake River Plain Aquifer. Routine waste water disposal was changed from deep injection wells to ponds at the ICPP...
Global color and albedo variations on Io
A. S. McEwen
1988, Icarus (73) 385-426
Three multispectral mosaics of Io have been produced from Voyager imaging data: a global mosaic from each of the Voyager 1 and Voyager 2 data sets and a high-resolution mosaic of the region surrounding the volcano Ra Patera. The mosaics are...
The stress heat-flow paradox and thermal results from Cajon Pass
A.H. Lachenbruch, J.H. Sass
1988, Geophysical Research Letters (15) 981-984
Conventional friction models predict a substantial thermal anomaly associated with active traces of strike-slip faults, but no such anomaly is observed from over 100 heat-flow determinations along 1,000 km of the San Andreas fault. The Cajon Pass well is being drilled to bring deep heat-flow and...
Assessing the earthquake hazards in urban areas
W. W. Hays, P. L. Gori, W. J. Kockelman
1988, Earthquakes & Volcanoes (USGS) (20) 208-212
Major urban areas in widely scattered geographic locations across the United States are a t varying degrees of risk from earthquakes. the locations of these urban areas include Charleston, South Carolina; Memphis Tennessee; St.Louis, Missouri; Salt Lake City, Utah; Seattle-Tacoma, Washington; Portland, Oregon; and Anchorage, Alaska; even Boston, Massachusetts, and...
Sandstone porosity as a function of thermal maturity
J. W. Schmoker, D. L. Gautier
1988, Geology (16) 1007-1010
Sandstone porosity decreases in the subsurface as a power function of thermal maturity: ϕ = A(M)B, where ϕ is porosity and M is a measure of thermal maturity representing integrated time-temperature history; A and B are constants for a given sandstone of homogeneous properties but...
Determining transit losses for water deliveries by use of stream-aquifer models
Russell K. Livingston
1988, Conference Paper
Hydrologic modeling of stream-aquifer interaction commonly has been used to quantify transit losses associated with water deliveries, such as those from reservoir storage. This technique requires estimation of model parameters that include stage-discharge relations, channel-storage coefficient, aquifer transmissivity, and aquifer-storage coefficient. Because data to reliably estimate or calibrate these parameters...
Stochastic system identification in structural dynamics
Erdal Safak
1988, Conference Paper
Recently, new identification methods have been developed by using the concept of optimal-recursive filtering and stochastic approximation. These methods, known as stochastic identification, are based on the statistical properties of the signal and noise, and do not require the assumptions of current methods. The criterion for stochastic system identification is...
Acetylene as a substrate in the development of primordial bacterial communities
C.W. Culbertson, F.E. Strohmaier, R.S. Oremland
1988, Origins of Life and Evolution of the Biosphere (18) 397-407
The fermentation of atmospheric acetylene by anaerobic bacteria is proposed as the basis of a primordial heterotrophic food chain. The accumulation of fermentation products (acetaldehyde, ethanol, acetate and hydrogen) would create niches for sulfate-respiring bacteria as well as methanogens. Formation of acetylene-free environments in soils and sediments would also alter...
Crustal velocities near Coalinga, California, modeled from a combined earthquake/explosion refraction profile
N. Macgregor-Scott, A. Walter
1988, Bulletin of the Seismological Society of America (78) 1475-1490
Crustal velocity structure for the region near Coalinga, California, has been derived from both earthquake and explosion seismic phase data recorded along a NW-SE seismic-refraction profile on the western flank of the Great Valley east of the Diablo Range. Comparison of the two data sets reveals P-wave phases in common...
Differences in visible and near-IR responses, and derived vegetation indices, for the NOAA-9 and NOAA-10 AVHRRs: a case study
Kevin P. Gallo, Jeffery C. Eidenshink
1988, Photogrammetric Engineering and Remote Sensing (54) 485-490
This study evaluates the differences in the visible and near-IR responses of the Advanced Very High Resolution Radiometers (AVHRR) of the National Oceanic and Atmospheric Administration (NOAA)-9 and -10 satellites for coincident sample locations. The study also evaluates the differences in vegetation indices computed from those data. Data were acquired...
Seismic stratigraphy and late Quaternary shelf history, south-central Monterey Bay, California
J. L. Chin, H.E. Clifton, H.T. Mullins
1988, Marine Geology (81) 137-157
The south-central Monterey Bay shelf is a high-energy, wave-dominated, tectonically active coastal region on the central California continental margin. A prominent feature of this shelf is a sediment lobe off the mouth of the Salinas River that has surface expression.High-resolution seismic-reflection profiles reveal that an angular...
Acute aspergillosis in mallards at Oahe seep near Pierre, South Dakota
W.C. Bair, S. Gay Simpson, R. M. Windingstad
1988, Prairie Naturalist (20) 153-156
Aspergillosis was diagnosed at the cause of death of 158 mallards (Anas platyrhynchos) in January and February 1985 and 11 mallards in December 1985 near Pierre, SD. Isolation of Aspergillus fumigatus from carcass tissues confirmed the diagnosis. The sex ratio of mallards dead from aspergillosis in January and February 1985...
An outbreak of type E botulism among common loons (Gavia immer) in Michigan's Upper Peninsula
Christopher J. Brand, Stephen Schmitt, Ruth M. Duncan, Thomas M. Cooley
1988, Journal of Wildlife Diseases (24) 471-476
An epizootic of type E botulism (Clostridium botulinum) occurred among common loons (Gavia immer) along the Lake Michigan shore of Michigan's Upper Peninsula (USA) during October and November 1983. An estimated 592 dead loons washed ashore along the Garden Peninsula. Type E botulinal toxin was demonstrated in blood samples and...
Depositional models for two Tertiary coal-bearing sequences in the Powder River Basin, Wyoming, USA
Peter D. Warwick, Ronald W. Stanton
1988, Journal of the Geological Society (145) 613-620
Depositional controls on peat-forming environments which produce thick (>10m) coal beds can be inferred from relationships between coal bed geometry, maceral composition and associated lithologies. Study of these relationships within sedimentary sequences associated with the Wyodak-Anderson (Palaeocene) and the Felix (Eocene) sub-bituminous coal beds in the Powder River Basin,...
Assessment of ground-water contamination near Lantana landfill, Southeast Florida
G.M. Russell, A.L. Higer
1988, Groundwater (26) 156-164
The Lantana landfill located in Palm Beach County rises 40 to 50 feet above normal ground level and consists of about 250 acres of compacted garbage and trash, some below the water table. Surface-resistivity measurements and water-quality analyses indicate a contaminant plume along the eastern...