Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

184582 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 5138, results 128426 - 128450

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Dietary changes and poor reproductive performance in Glaucous-winged Gulls
Edward C. Murphy, Robert H. Day, Karen L. Oakley, A. Anne Hoover
1984, The Auk (101) 532-541
The breeding phenology of Glaucous-winged Gulls (Larus glaucescens) on Squab Island, Aialik Bay, Alaska in 1979 was identical to that in 1980, but clutch sizes and later reproductive performance differed markedly. In 1979, clutch sizes were small, but chick growth rates and survivorship were high. In contrast, clutch sizes were...
Spilled oil and infaunal activity - Modification of burrowing behavior and redistribution of oil
H.E. Clifton, K.A. Kvenvolden, J. B. Rapp
1984, Marine Environmental Research (11) 111-136
A series of experiments in Willapa Bay, Washington, indicates the degree to which the presence of spilled oil modifies the burrowing behavior of infauna and the extent to which the animals redistribute oil into intertidal sediment. Small amounts of North Slope crude oil introduced at low tide directly into burrow...
Evolution of the yardangs at Rogers Lake, California
A. W. Ward, R. Greeley
1984, Geological Society of America Bulletin (95) 829-837
Yardangs are streamlined, wind-eroded hills common to most deserts. Yardangs at Rogers Lake, Mojave Desert, California, have streamlined forms characteristic of objects eroded by moving fluids, a teardrop shape that approaches an ideal 1:4 width-to-length ratio. In wind-tunnel simulations, miniature forms of various...
Geochemistry of tholeiitic and alkalic lavas from the Koolau Range, Oahu, Hawaii: Implications for Hawaiian volcanism
M.F. Roden, F.A. Frey, D.A. Clague
1984, Earth and Planetary Science Letters (69) 141-158
Lavas of the post-erosional, alkalic Honolulu Volcanics have significantly lower 87Sr/86Sr and higher 143Nd/144Nd than the older and underlying Koolau tholeiites which form the Koolau shield of eastern Oahu, Hawaii. Despite significant compositional variation within lavas forming the Honolulu Volcanics, these lavas are isotopically...
Determination of uranium concentration in water by liquid anion exchange-delayed neutron analysis
R. A. Zielinski, D. M. McKown
1984, Journal of Radioanalytical and Nuclear Chemistry (84) 207-212
Dissolved uranium is selectively removed from 11 of filtered, acidified water using a liquid anion exchange resin (Amberlite LA-1) dissolved in 10 ml of purified kerosene. The organic phase is then analyzed by a standard delayed neutron counting technique. Yields of removed uranium are consistently greater than 90 percent over...
PREDICTING GROUND-WATER DRAINAGE TO SURFACE MINES.
Linda S. Weiss, Devin L. Galloway
Schreiber David L., editor(s)
1984, Conference Paper
A two-dimensional, finite-difference numerical model is used to simulate the drainage of ground water into a surface coal mine. Graphs of dimensionless head as a function of dimensionless distance, and dimensionless seepage flux as a function of dimensionless time are developed from results of the numerical modeling. Changes in seepage...
Transport of clays in the eastern part of santa barbara channel, California
R.L. Kolpack, D.E. Drake
1984, Geo-Marine Letters (4) 191-196
A record discharge of about 54 ?? 106 metric tons of predominantly fine-grained detrital sediment was introduced during 1969 into the eastern part of Santa Barbara Channel from the Santa Clara and Ventura Rivers. The clay-size fraction from bottom samples collected during a time-series of about 18 months revealed movement...
Landslides caused by earthquakes
D. K. Keefer
1984, Geological Society of America Bulletin (95) 406-421
Data from 40 historical world-wide earthquakes were studied to determine the characteristics, geologic environments, and hazards of landslides caused by seismic events. This sample of 40 events was supplemented with intensity data from several hundred United States earthquakes to study relations between landslide...
Heat capacity and entropy of Ni2SiO4-olivine from 5 to 1000 K and heat capacity of Co2SiO4 from 360 to 1000 K.
R. A. Robie, B. S. Hemingway, J. Ito, K. M. Krupka
1984, American Mineralogist (69) 1096-1101
The heat capacity of Ni2SiO4-olivine has been measured between 5 and 387 K by cryogenic adiabatic-shield calorimetry and between 360 and 1000 K by differential scanning calorimetry. The heat capacity of Co2SiO4-olivine was measured between 360 and 1000 K by differential scanning calorimetry.-J.A.Z....
Laboratory studies of volcanic jets
S. W. Kieffer, B. Sturtevant
1984, Journal of Geophysical Research Solid Earth (89) 8253-8268
The study of the fluid dynamics of violent volcanic eruptions by laboratory experiment is described, and the important fluid-dynamic processes that can be examined in laboratory models are discussed in detail. In preliminary experiments, pure gases are erupted from small reservoirs. The gases used are Freon 12 and Freon 22,...
Evaporation from flowing channels
J.M. Fulford, T.W. Sturm
1984, Journal of Energy Engineering - ASCE (110) 1-9
Stability‐dependent and Dalton‐type mass transfer formulas are determined from experimental evaporation data in ambient and heated channels and are shown to have similar performance in prediction of evaporation. The formulas developed are compared with those proposed by other investigators for lakes and flowing channels. The evaporation data were obtained from...
EFFECTS OF LOCALIZED AQUIFER BOILING ON FLUID PRODUCTION AT CERRO PRIETO.
Alfred H. Truesdell, Franco D’Amore, David Nieva
1984, Conference Paper, Transactions - Geothermal Resources Council
Localized aquifer boiling in the shallow two-phase reservoir of Cerro Prieto has produced excess steam and increased electrical output. Unfortunately it has also caused near-well mineral deposition that has decreased permeability and fluid flow. Inflow of cold water has limited the extent of aquifer boiling and permeability loss. The deeper...
Thermal conductivity determinations on solid rock - a comparison between a steady-state divided-bar apparatus and a commercial transient line-source device
J.H. Sass, C. Stone, R. J. Munroe
1984, Journal of Volcanology and Geothermal Research (20) 145-153
Two apparatuses were used to measure thermal conductivities on pairs of contiguous samples from 17 specimens of solid rock: the USGS divided-bar apparatus, a steadystate comparative method, and the Shotherm "Quick Thermal Meter" (QTM), which employs a transient strip heat source. Both devices were calibrated relative to fused silica. Both...
EVALUATION OF LOW-SUN ILLUMINATED LANDSAT-4 THEMATIC MAPPER DATA FOR MAPPING HYDROTHERMALLY ALTERED ROCKS IN SOUTHERN NEVADA.
Melvin H. Podwysocki, Marty S. Power, Jack Salisbury, O. D. Jones
1984, Conference Paper
Landsat-4 Thematic Mapper (TM) data of southern Nevada collected under conditions of low-angle solar illumination were digitally processed to identify hydroxyl-bearing minerals commonly associated with hydrothermal alteration in volcanic terrains. Digital masking procedures were used to exclude shadow areas and vegetation and thus to produce a CRC image suitable for...
Deformation, geochemistry, and origin of massive sulfide deposits, Gossan lead district, Virginia
J. E. Gair, J. F. Slack
1984, Economic Geology (79) 1483-1520
The Gossan Lead district is a 28-km-long, northeast-trending belt of discontinuous massive sulfide deposits in the Blue Ridge province of southwestern Virginia. The deposits, hosted by the Ashe Formation of late Proterozoic age, consist of strata-bound lenses and layers of massive pyrrhotite, minor chalcopyrite, sphalerite, and pyrite, and rare arsenopyrite...
A standard-reference water-suspended sediment sample for total recoverable metals
Marvin J. Fishman, Bernard A. Malo, Delora K. Boyle
1984, Journal of Testing and Evaluation (12) 182-186
The U.S. Geological Survey has been preparing and maintaining a library of standard-reference water samples for dissolved inorganic constituents for 19 years. Recently, the reference-sample program was expanded to include a water-suspended sediment mixture for the determination of total recoverable metals. An interlaboratory round-robin study was conducted. Digestion procedures used...
Heating of a fully saturated Darcian half-space: Pressure generation, fluid expulsion, and phase change
P. Delaney
1984, International Journal of Heat and Mass Transfer (27) 1327-1335
Analytical solutions are developed for the pressurization, expansion, and flow of one- and two-phase liquids during heating of fully saturated and hydraulically open Darcian half-spaces subjected to a step rise in temperature at its surface. For silicate materials, advective transfer is commonly unimportant in the liquid region; this is not...
The solubility of strontianite (SrCO3) in CO2-H2O solutions between 2 and 91°C, the association constants of SrHCO+3(aq) and SrCO03(aq) between 5 and 80°C, and an evaluation of the thermodynamic properties of Sr2+(aq) and SrCO3(cr) at 25°C and 1 atm total pressure
Eurybiades Busenberg, Niel Plummer, Vivian B. Parker
1984, Geochimica et Cosmochimica Acta (48) 2021-2035
Seventy new measurements (SrT-Pco2 of the solubility of strontianite were used to evaluate the equilibrium constant for the reaction SrCO3(cr) = Sr2+(aq) + CO2−3(aq) between 2 and 91 °C. The temperature dependence of the equilibrium constant is given by the expression Log K = 155.0305 − 7239.594/T − 56.58638 log T where T is in degrees Kelvin. The log K of strontianite,...
Middle Cambrian fossils from the Doonerak anticlinorium, central Brooks Range, Alaska
J.T. Dutro Jr., A. R. Palmer, J.E. Repetski, W. P. Brosge
1984, Journal of Paleontology (58) 1364-1371
Middle Cambrian fossils collected near Wolf Creek in the Wiseman quadrangle, northern Alaska, include trilobites and paraconodonts. Trilobites date the strata as early Middle Cambrian, correlative with the Amgan Stage of Siberia. The assemblage includes: Kootenia cf. K. anabarensis Lermontova, cf. 'Parehmania' lata Chernysheva and Pagetia sp. Specimens of the...
Sedimentary structures formed in sand by surface tension on melting hailstones
D. M. Rubin, R. E. Hunter
1984, Journal of Sedimentary Petrology (54) 581-582
Craters form when hailstones impact sand. When a hailstone melts, wet but unsaturated sand within the crater is attracted to the hailstone surface by surface tension. Shrinkage of the melting hailstone then produces one or more rings of sand within the impact crater.--Modified...