Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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
Produced water and hydrocarbon releases at the Osage-Skiatook petroleum environmental research sites, Osage County, Oklahoma: Introduction and geologic setting
In February 2001, the USGS started studies of the impacts of produced water and hydrocarbon releases at 2 research sites adjacent to Skiatook Lake in southeastern Osage County near Tulsa, Oklahoma. Both sites are in a dissected area of modest relief underlain by interbedded shale, siltstone, and sandstone. Thicker resistant sandstone units typically form the hill crests. Hillslopes are underlain b
Authors
James K. Otton, Robert A. Zielinski
Two‐step processing for 3D magnetic source locations and structural indices using extended Euler or analytic signal methods
No abstract available.
Authors
Jeffrey Phillips
The role of C3 and C4 grasses to interannual variability in remotely sensed ecosystem performance over the US Great Plains
No abstract available.
Authors
C. Ricotta, B. C. Reed, L.T. Tieszen
Acoustic, pore pressure, and strength properties of sediment containing gas hydrate
No abstract available.
Authors
William J. Winters, William P. Dillon, Deborah R. Hutchinson
A compact high-resolution 3-D imaging spectrometer for discovering Oases on Mars
A new design for a very lightweight, very high throughput reflectance sectrometer enabled by two new technologies being developed is presented. These new technologies include integral field unit optics to enable simultaneous imaging and spectroscopy at high spatial resolution with an infrared (IR) array, and silicon grisms to enable compact and high-resolution spectroscopy.
Authors
J. Ge, D. Ren, J. I. Lunine, R. H. Brown, R.V. Yelle, L. A. Soderblom
A Geothermal GIS for Nevada: Defining Regional Controls and Favorable Exploration Terrains for Extensional Geothermal Systems
Spatial analysis with a GIS was used to evaluate geothermal systems in Nevada using digital maps of geology, heat flow, young faults, young volcanism, depth to groundwater, groundwater geochemistry, earthquakes, and gravity. High-temperature (>160??C) extensional geothermal systems are preferentially associated with northeast-striking late Pleistocene and younger faults, caused by crustal extensio
Authors
M.F. Coolbaugh, J. V. Taranik, G. L. Raines, L.A. Shevenell, D. L. Sawatzky, R. Bedell, T.B. Minor
A preliminary evaluation of near-transducer velocities collected with low-blank acoustic Doppler current profiler
Many streams and rivers for which the US Geological Survey must provide discharge measurements are too shallow to apply existing acoustic Doppler current profiler techniques for flow measurements of satisfactory quality. Because the same transducer is used for both transmitting and receiving acoustic signals in most Doppler current profilers, some small time delay is required for acoustic "ringing
Authors
J. W. Gartner, N. K. Ganju
Absolute irradiance of the Moon for on-orbit calibration
The recognized need for on-orbit calibration of remote sensing imaging instruments drives the ROLO project effort to characterize the Moon for use as an absolute radiance source. For over 5 years the ground-based ROLO telescopes have acquired spatially-resolved lunar images in 23 VNIR (Moon diameter ???500 pixels) and 9 SWIR (???250 pixels) passbands at phase angles within ??90 degrees. A numerica
Authors
T.C. Stone, H. H. Kieffer
Accurate mass analysis of ethanesulfonic acid degradates of acetochlor and alachlor using high-performance liquid chromatography and time-of-flight mass spectrometry
Degradates of acetochlor and alachlor (ethanesulfonic acids, ESAs) were analyzed in both standards and in a groundwater sample using high-performance liquid chromatography-time-of-flight mass spectrometry with electrospray ionization. The negative pseudomolecular ion of the secondary amide of acetochlor ESA and alachlor ESA gave average masses of 256.0750??0.0049 amu and 270.0786??0.0064 amu respe
Authors
E.M. Thurman, I. Ferrer, R. Parry
Advances in directional borehole radar data analysis and visualization
The U.S. Geological Survey is developing a directional borehole radar (DBOR) tool for mapping fractures, lithologic changes, and underground utility and void detection. An important part of the development of the DBOR tool is data analysis and visualization, with the aim of making the software graphical user interface (GUI) intuitive and easy to use. The DBOR software system consists of a suite of
Authors
D.V.G. Smith, P.J. Brown
Alkylcyclohexanes in environmental geochemistry
Two case studies of oil spills that demonstrate the changing distribution patterns resulting from long-term anaerobic microbial degradation were presented. These spills were the 1979 crude-oil spill in Bemidji, MN, and a chronic diesel-fuel spillage from 1953-1991 at Mandan, ND. The alkylcyclohexanes in both spilled oil products were affected by similar biodegradative processes in which the compou
Authors
F. D. Hostettler, K. A. Kvenvolden