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

185258 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 3780, results 94476 - 94500

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
The origin of the Bering Sea basalt province, western Alaska
E. J. Moll-Stalcup
1996, Geology of the Pacific Ocean (12) 671-689
Bering Sea basalt province consists of at least 15 late Cenozoic (less than 6 Ma) volcanic fields that occur on islands in the Bering Sea and along the adjacent west coast of Alaska. The fields are composed of widespread flows of tholeiitic and alkali olivine basalt and small cones, flows,...
Thermal conductivity of water-saturated rocks from the KTB pilot hole at temperatures of 25 to 300°C
D. Pribnow, C.F. Williams, J.H. Sass, R. Keating
1996, Geophysical Research Letters (23) 391-394
The conductivitites of selected gneiss (two) and amphibolite (one) core samples have been measured under conditions of elevated temperature and pressure with a needle‐probe. Water‐saturated thermal conductivity measurements spanning temperatures from 25 to 300°C and hydrostatic pressures of 0.1 and 34 MPa confirm the general decrease in conductivity with increasing...
Hydrogen isotope systematics of phase separation in submarine hydrothermal systems: Experimental calibration and theoretical models
M.E. Berndt, R.R. Seal II, Wayne C. Shanks III, W.E. Seyfried Jr.
1996, Geochimica et Cosmochimica Acta (60) 1595-1604
Hydrogen isotope fractionation factors were measured for coexisting brines and vapors formed by phase separation of NaCl/H2O fluids at temperatures ranging from 399-450??C and pressures from 277-397 bars. It was found that brines are depleted in D compared to coexisting vapors at all conditions studied. The magnitude of hydrogen isotope...
Controls on surface water chemistry in the upper Merced River basin, Yosemite National Park, California
D. W. Clow, M.A. Mast, K. Campbell
1996, Hydrological Processes (10) 727-746
Surface water draining granitic bedrock in Yosemite National Park exhibits considerable variability in chemical composition, despite the relative homogeneity of bedrock chemistry. Other geological factors, including the jointing and distribution of glacial till, appear to exert strong controls on water composition. Chemical data from...
Streamflow trends in Wisconsin's driftless area
W.A. Gebert, W.R. Krug
1996, Water Resources Bulletin (32) 733-744
Trends in streamflow characteristics were analyzed for streams in southwestern Wisconsin's Driftless Area by using data at selected gaging stations. The analyses indicate that annual low flows have increased significantly, whereas annual flood peaks have decreased. The same trends were not observed for forested areas of northern Wisconsin. Streamflow trends...
Removal of selenium from contaminated agricultural drainage water by nanofiltration membranes
Y.K. Kharaka, G. Ambats, T. S. Presser, R. A. Davis
1996, Applied Geochemistry (11) 797-802
Seleniferous agricultural drainage wastewater has become a new major source of pollution in the world. In the USA, large areas of farmland in 17 western states, generate contaminated salinized drainage with Se concentrations much higher than 5 ??g/l, the US Environmental Protection Agency water-quality criterion for the protection of aquatic...
The vascular plant flora of Hopewell Culture National Historical Park. Ross County, Ohio
J. P. Bennett, J.E. Course
1996, Rhodora (98) 146-167
HopewellCulture National Historical Park, a unit of the United States National Park Service located in Ross County in south central Ohio, was created to restore, protect, and interpret the legacy of the mound building Hopewell prehistoric peoples. The vascular flora of the park had been estimated to be only 20%...
Genesis of the Silsilah tin deposit, Kingdom of Saudi Arabia
Robert J. Kamilli, R.E. Criss
1996, Economic Geology (91) 1414-1434
The Silsilah tin deposit (lat 25 degrees 06' N, long 42 degrees 40' E) consists of a group of pervasively greisenized, flat-topped granite cupolas within a 12-km-diam ring complex. The greisens contain varying amounts of disseminated cassiterite and wolframite. Several types of quartz veins are peripheral to the greisens; some...
Discharges and yields of suspended sediment in the Ob' and Yenisey Rivers of Siberia
N.N. Bobrovitskaya, C. Zubkova, R.H. Meade
1996, IAHS-AISH Publication (236) 115-123
The northward-flowing rivers of Siberia deliver immense quantities of water but only relatively small quantities of sediment to the Arctic Ocean. The relatively low delivery of sediment to the ocean by these rivers is explained by the large areas of forest and swamp in their basins. In the Ob' River,...
Quality and petrographic characteristics of Paleocene coals from the Hanna basin, Wyoming
B.S. Pierce
1996, Conference Paper, Organic Geochemistry
Coal beds from the Ferris and Hanna Formations, in the Hanna basin, south-central Wyoming, exhibit distinct differences in ash yield, sulfur content, and petrographic and palynologic constituents. These differences are interpreted to be controlled by tectonic changes of the Hanna basin and adjoining uplifts during evolutionary development, which, in turn,...
The ratio method of estimating water resistivity and TDS from resistivity logs
D. G. Jorgensen
1996, Ground Water (34) 519-522
It is a general belief that useful estimates of total dissolved solids concentrations of ground water cannot be made from borehole geophysical logs. A case study of estimating total dissolved solids concentration of ground water in the local area using the ratio method yielded estimates with an average error of...
Rheology of water ices V and VI
W.B. Durham, L.A. Stern, S. H. Kirby
1996, Journal of Geophysical Research B: Solid Earth (101) 2989-3001
We have measured the mechanical strength (σ) of pure water ices V and VI under steady state deformation conditions. Constant displacement rate compressional tests were conducted in a gas apparatus at confining pressures from 400 < P < 800 MPa, temperatures from 209 < T < 270 K, and strain rates 7 × 10−7 < <img...
Shorebird use of South Carolina managed and natural coastal wetlands
Louise M. Weber, Susan M. Haig
1996, Journal of Wildlife Management (60) 73-82
While many migrating and wintering shorebird (Charadriiformes) species face declines in quality and quantity of natural stopover sites, diked wetlands managed for shorebirds may provide supplemental habitat. We describe an integrative shorebird-waterfowl management strategy used at Tom Yawkey Wildlife Center on South Island, South Carolina, during 3 winter-spring seasons (1991-93)....
Element concentrations on Hypogymnia physodes (L.) Nyl. after three years of transplanting along Lake Michigan
James P. Bennett, M. J. Dibben, K. J. Lyman
1996, Environmental and Experimental Botany (36) 255-259
Improvements in air quality in air polluted areas are often followed by recolonization of habitats by sensitive lichens that had died out when air quality was worse. To test the hypothesis that air quality at Indiana Dunes National Lakeshore has improved such that lichens could recolonize the area, samples of...
Microenvironments and microscale productivity of cyanobacterial desert crusts
F. Garcia-Pichel, Jayne Belnap
1996, Journal of Phycology (32) 774-782
We used microsensors to characterize physicochemical microenvironments and photosynthesis occurring immediately after water saturation in two desert soil crusts from southeastern Utah, which were formed by the cyanobacteria Microcoleus vaginatus Gomont, Nostoc spp., and Scytonema sp. The light fields within the crusts presented steep vertical gradients in magnitude and spectral...
Floristic summary of plant species in the air pollution literature
J. P. Bennett
1996, Environmental Pollution (92) 253-256
A floristic summary and analysis was performed on a list of the plant species that have been studied for the effects of gaseous and chemical air pollutants on vegetation in order to compare the species with the flora of North America north of Mexico. The scientific names of 2081 vascular...