Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5346
Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico
No abstract available.
Authors
Jesus Rodriguez-Martinez, R.T. Richards
The implication of a perched-water system based on USW WT-24 hydrochemistry
No abstract available.
Authors
Gary L. Patterson, Zell E. Peterman, James B. Paces
Anomalous groundwater 234U/238U beneath Yucca Mountain: Evidence for local recharge?
No abstract available.
Authors
James B. Paces, K. R. Ludwig, Zell E. Peterman, Leonid A. Neymark, J. M. Kenneally
Inferences for Yucca Mountain unsaturated-zone hydrology from secondary minerals
No abstract available.
Authors
James B. Paces, Leonid A. Neymark, Brian D. Marshall, J. F. Whelan, Zell E. Peterman
The collection of clear-water contraction and abutment scour data at selected bridge sites in the coastal plain and piedmont of South Carolina
Clear-water contraction and abutment scour data were collected at 128 bridge sites in South Carolina. In the sandy soils of the Coastal Plain, clear-water-scour data were collected at 63 sites (scour depths ranged from 0.4 to 7.2 meters.) In the clayey soils of the Piedmont, clear-water-scour data were collected at 47 sites (scour depths ranged from 0 to 1.4 meters.) In the sandy, clayey soils of
Authors
Stephen T. Benedict, Andy W. Caldwell
Effects of flooding regime, mycorrhizal inoculation and seedling treatment type on first-year survival of Nuttal Oak (Quercus nuttallii Palmer)
Three different types of Nuttall oak (Quercus nuttallii Palmer) seedlings were planted on floodprone, former cropland in Mississippi, Louisiana, and Texas. The three types of 1+0 seedlings planted at each site in January and February of 1995 were bareroot seedlings, seedlings grown in 164 square centimeters plastic containers, and container grown seedlings inoculated with vegetative mycelia of Pis
Authors
Virginia Burkett, Hans Williams
Phreatophyte influence on reductive dechlorination in a shallow aquifer containing TCE
No abstract available.
Authors
Roger W. Lee, Sonya A. Jones, Eve L. Kuniansky, Gregory J. Harvey, Sandra M. Eberts
2,3,6-/3,4,5-Trimethyl substituted diaryl carotenoid derivatives (Chlorobiaceae) in petroleums of the Belarussian Pripyat River Basin
Degradation products of the 2,3,6-/3,4,5-trimethyl substituted analog of isorenieratene were characterized in Belarussian petroleums. Devonian oils of low maturity were found to contain high concentrations (e.g., 35 mg/g) of C40 diaryl isoprenoids (2,3,6-/3,4,5-trimethyl substitution) along with an abundance of maturation-related compounds. A maturation scheme for diaryl carotenoid (2,3,6-/3,4,5-t
Authors
D.J. Clifford, J. L. Clayton, Damste J.S. Sinninghe
A nowcast model for tides and tidal currents in San Francisco Bay, California
National Oceanographic and Atmospheric Administration (NOAA) installed Physical Oceanographic Real-Time System (PORTS) in San Francisco Bay, California to provide observations of tides, tidal currents, and meteorological conditions. PORTS data are used for optimizing vessel operations, increasing margin of safety for navigation, and guiding hazardous material spill prevention and response. Because
Authors
Ralph T. Cheng, Richard E. Smith
A refined succession of Changhsingian and Griesbachian neogondolellid conodonts from the Meishan section, candidate of the global stratotype section and point of the Permian-Triassic boundary
A detailed study of new conodont collections from the Changxing Formation at the Meishan section has resulted in taxonomic refinement of several important neogondolellid species. Most of the previously erected species are much more strictly redefined, mainly based on the denticulation of the holotypes, and the stratigraphic ranges attributed to key conodont taxa are modified. Three new species and
Authors
S. Mei, K. Zhang, B. R. Wardlaw
An application of well data in oil and gas assessment-arctic national wildlife refuge
A current assessment of oil and gas resources in the Arctic National Wildlife Refuge (ANWR) 1002 Area by the U.S. Geological Survey relies upon seismic data, geological mapping of exposures south and west of the assessment area, and exploratory wells. Information obtained from wells up to 50 km west and north of ANWR is presented. It is emphasized that the synthesis of well data with other geologi
Authors
P. H. Nelson, Christopher J. Schenk, K. J. Bird