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

185169 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 3903, results 97551 - 97575

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Evolution of tholeiitic diabase sheet systems in the eastern United States: examples from the Culpeper Basin, Virginia-Maryland, and the Gettysburg Basin, Pennsylvania
Laurel G. Woodruff, A.J. Froelich, Harvey E. Belkin, D. Gottfried
1995, Journal of Volcanology and Geothermal Research (64) 143-169
High-TiO2, quartz-normative (HTQ) tholeiite sheets of Early Jurassic age have intruded mainly Late Triassic sedimentary rocks in several early Mesozoic basins in the eastern US. Field observations, petrographic study, geochemical analyses and stable isotope data from three HTQ sheet systems were used to develop a general model of magmatic differentiation...
Flooding in southeastern United States from tropical storm Alberto, July 1994
Timothy W. Hale, Timothy C. Stamey
Espey William H.Combs Phil G., editor(s)
1995, Conference Paper, International Water Resources Engineering Conference - Proceedings
In July 1994, parts of Georgia, Alabama and Florida were devastated by floods resulting from rainfall produced by Tropical Storm Alberto. The flooding resulted in 33 human deaths in towns and small communities or near swollen streams. Total damages to public and private property were estimated at nearly $1 billion...
Off-site movement of pesticide-contaminated fill from agrichemical facilities during the 1993 flooding in Illinois
William R. Roy, Sheng-Fu J. Chou, I.G. Krapac
1995, Journal of Environmental Quality (24) 1034-1038
Twenty retail agrichemical facilities were flooded. There was a concern that pesticide-contaminated road fill at these facilities had been transported into residential areas by the flooding. Forty fill and flood-related sediment samples were collected at six facilities. No significant accumulation of sediments was present at any...
Morphological differences in Pacific Coast populations of greater white-fronted geese
D.L. Orthmeyer, John Y. Takekawa, Craig R. Ely, M. Wege, W.E. Newton
1995, Condor (97) 123-132
We examined morphological relationships of three Pacific coast populations of Greater White-fronted Geese (Anser albifrons). Adult geese were captured and measured at three breeding areas in Alaska and two wintering areas in California, 1980-1991. A two-step discriminant function analysis examined morphological differences among the three populations. Stepwise discriminant function procedures...
Using known populations of pronghorn to evaluate sampling plans and estimators
Kathy M. Kraft, Douglas H. Johnson, Jack M. Samuelson, Stephen H. Allen
1995, Journal of Wildlife Management (59) 129-137
Although sampling plans and estimators of abundance have good theoretical properties, their performance in real situations is rarely assessed because true population sizes are unknown. We evaluated widely used sampling plans and estimators of population size on 3 known clustered distributions of pronghorn (Antilocapra americana). Our criteria were accuracy of...
How much habitat management is needed to meet mallard production objectives?
L.M. Cowardin, T.L. Shaffer, K.M. Kraft
1995, Wildlife Society Bulletin (23) 48-55
We used results from simulation models to demonstrate the benefit-cost ratios of habitat management to increase the number of mallard (Anas platyrhynchos) recruits produced. The models were applied to hypothetical 2-habitat landscapes comprised of managed and unmanaged habitat. Managed habitats were predator barrier fencing and CRP cover; unmanaged habitat was...
Modified transmitter attachment method for adult ducks
P.J. Pietz, D.A. Brandt, Gary L. Krapu, D. A. Buhl
1995, Journal of Field Ornithology (66) 408-417
The value of radio telemetry for waterfowl research depends on the availability of suitable methods of attaching transmitters. In previous studies, external transmitters attached to adult Mallards (Anas platyrhynchos) with sutures and glue did not stay on birds reliably. In an attempt to improve transmitter retention, a method of attachment...
Measured and predicted velocity and longitudinal dispersion at steady and unsteady flow, Colorado River, Glen Canyon Dam to lake mead
J.B. Graf
1995, Water Resources Bulletin (31) 265-281
The effect of unsteadiness or dam releases on velocity and longitudinal dispersion of flow was evaluated by injecting a fluorescent dye into the Colorado River below Glen Canyon Dam and sampling for dye concentration at selected sites downstream. In Glen Canyon, average flow velocity through the study reach increased directly...
Distribution of phytobenthos in the Yakima River basin, Washington, in relation to geology, land use, and other environmental factors
Harry V. Leland
1995, Canadian Journal of Fisheries and Aquatic Sciences (52) 1108-1129
Benthic-algal distributions in the Yakima River, Washington, basin were, examined in relation to geology, land use, water chemistry, and stream habitat using indicator-species classification (TWINSPAN) and canonical correspondence analysis (CCA). Algal assemblages identified byTWINSPAN were each associated with a narrow range of water-quality conditions. In the Cascade geologic province,...
Turtles
Jeffrey E. Lovich
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
Turtles have existed virtually unchanged for the last 200 million years. Unfortunately, some of the same traits that allowed them to survive the ages often predispose them to endangerment. Delayed maturity and low and variable annual reproductive success make turtles unusually susceptible to increased mortality through exploitation and habitat modifications...
Sidescan-sonar surveys of critical habitats in Long Island Sound, Connecticut
L. J. Poppe, R. S. Lewis, Roman Zajac, D.C. Twichell, H.J. Knebel
1995, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
The Long Island Sound estuary is located in the most densely populated region of the U.S.. Due to the enormous surrounding population, large inputs of anthropogenic wastes and toxic chemicals, benthic habitats were degraded. To address this environmental problem, sidescan-sonar mosaics are being developed within specific areas of critical concern....
Computational scheme for the prediction of metal ion binding by a soil fulvic acid
J.A. Marinsky, M.M. Reddy, J.H. Ephraim, A.S. Mathuthu
1995, Analytica Chimica Acta (302) 309-322
The dissociation and metal ion binding properties of a soil fulvic acid have been characterized. Information thus gained was used to compensate for salt and site heterogeneity effects in metal ion complexation by the fulvic acid. An earlier computational scheme has been modified by incorporating an additional step which improves...
Using GIS for verification of bathymetric data from Long Island sound
Muriel S. Grim, Barbara A. Seekins, Thomas E. Chase
1995, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
Accurate depiction of the topography of the seafloor in coastal areas is needed for modeling of ecosystems and processes, and also as a framework for analyzing and displaying information used in management decisions. Often, errors must be corrected before acquired digital data bases can be used. To create an acceptable...
High-pressure amphibolite facies dynamic metamorphism and the Mesozoic tectonic evolution of an ancient continental margin, east- central Alaska
Cynthia Dusel-Bacon, V. L. Hansen, J.A. Scala
1995, Journal of Metamorphic Geology (13) 9-24
Ductilely deformed amphibolite facies tectonites comprise two adjacent terranes in east-central Alaska: the northern, structurally higher Taylor Mountain terrane and the southern, structurally lower Lake George subterrane of the Yukon-Tanana terrane. The pressure, temperature, kinematic and age data are interpreted to indicate that the metamorphism of the Taylor Mountain terrane...
Biotic and abiotic processes controlling water chemistry during snowmelt at rabbit ears pass, Rocky Mountains, Colorado, U.S.A.
N.E. Peters, G.H. Leavesley
1995, Conference Paper, Water, Air, and Soil Pollution
The chemical composition of snowmelt, groundwater, and streamwater was monitored during the spring of 1991 and 1992 in a 200-ha subalpine catchment on the western flank of the Rocky Mountains near Steamboat Springs, Colorado. Most of the snowmelt occurred during a one-month period annually that began in mid-May 1991 and...
A survey of natural aggregate properties and characteristics important in remote sensing and airborne geophysics
D. H. Knepper Jr., W. H. Langer, S. Miller
1995, Nonrenewable Resources (4) 99-120
Natural aggregate is vital to the construction industry. Although natural aggregate is a high volume/low value commodity that is abundant, new sources are becoming increasingly difficult to find and develop because of rigid industry specifications, political considerations, development and transportation costs, and environmental concerns. There are two primary sources of...
Geohydrology and water quality of the North Platte River alluvial aquifer, Garden County, Western Nebraska
Gregory V. Steele, James C. Cannia
1995, Conference Paper, International Symposium on Groundwater Management - Proceedings
In 1993, a 3-year study was begun to describe the geohydrology and water quality of the North Platte River alluvial aquifer near Oshkosh, Garden County, Nebraska. The study's objectives are to evaluate the geohydrologic characteristics of the alluvial aquifer and to establish a network of observation wells for long-term monitoring...
San Andreas fault zone drilling project: scientific objectives and technological challenges
S.H. Hickman, L.W. Younker, Mark D. Zoback
1995, Journal of Energy Resources Technology (117) 263-270
We are leading a new international initiative to conduct scientific drilling within the San Andreas fault zone at depths of up to 10 km. This project is motivated by the need to understand the physical and chemical processes operating within the fault zone and to answer fundamental questions about earthquake...