Conference Papers
Science Quality and Integrity
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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
Secondary minerals record past percolation flux at Yucca Mountain, Nevada
No abstract available.
Authors
Brian D. Marshall, James B. Paces, Leonid A. Neymark, J. F. Whelan, Zell E. Peterman
Late Quaternary history of Fortymile Wash in the area near the H-road crossing
No abstract available.
Authors
Scott C. Lundstrom, James B. Paces, Shannon A. Mahan
Geochronologic and isotope studies of calcite and silica constraining Quaternary unsaturated- and saturated zone hydrologic flux at Yucca Mountain, Nevada, USA
Both unsaturated- and saturated-zone aqueous solutions are capable of precipitating secondary mineral deposits that document the history and origins of past water flux. Calcite and opal occur as thin coatings on open fractures and cavity floors within the thick unsaturated zone at Yucca Mountain. Outermost surfaces of calcite have 14C ages of between 44,000 and 16,000 radiocarbon years; however, t
Authors
James B. Paces, Zell E. Peterman, Leonid A. Neymark, Joseph F. Whelan, Brian D. Marshall
Evaluation of geologic radon potential in two regions in southwestern and southern Poland
No abstract available.
Authors
Ryszard Strzelecki, Stanislaw Wolkowicz, Wojciech Wolkowicz, Kalina Mamont-Ciesa, D.G. Mose, Zoltan Szabo, Tamara I. Ivahnenko, G.W. Mushrush
Mapping hydraulically permeable fractures using directional borehole radar and hole-to-hole tomography with a saline tracer
Reflection-mode borehole radar and transmission-mode radar tomograms image heterogeneity in the electromagnetic properties of rock. Heterogeneity may be produced by interfaces between different rock types, foliation, and fracturing. In crystalline rock, hydraulic flow is primarily through fracture networks rather than through the rock matrix. Borehole radar methods have been applied to help map fl
Authors
David L. Wright, John W. Lane
Use of multi-offset borehole-radar reflection method in fractured crystalline bedrock at Mirror Lake, Grafton County, New Hampshire
Multi-offset, single-hole, borehole-radar reflection surveys were conducted at the U.S. Geological Survey Fractured Rock Research Site at Mirror Lake, in Grafton County, New Hampshire. The study was conducted to evaluate the benefits of applying multi-offset seismic processing techniques to borehole-radar reflection surveys in fractured rock.The multi-offset reflection surveys were conducted in co
Authors
John W. Lane, F. P. Haeni, Roelof J. Versteeg
Use of time-lapse attenuation-difference radar tomography methods to monitor saline tracer transport in fractured crystalline bedrock
No abstract available.
Authors
John W. Lane, F. P. Haeni, Frederick D. Day-Lewis
Assessing groundwater vulnerability using logistic regression
Determining the likelihood that groundwater contains elevated concentrations of contaminants can help water resource managers protect drinking water supplies. For example, this information is useful for selecting new sites for drinking water sources and designing more cost-effective monitoring strategies for existing sources. Groundwater vulnerability has typically been assessed using largely qual
Authors
Anthony J. Tesoriero, E. L. Inkpen, Frank D. Voss
Both contaminants and habitat limit Neosho madtom (Noturus Placidus) numbers in the Spring River, a midwestern warmwater stream effected by runoff from historic zinc and lead mining
No abstract available.
Authors
Mark L. Wildhaber, Ann L. Allert, Christopher J. Schmitt
Character of the middle Nonlithophysal Zone of the Topopah Spring Tuff at Yucca Mountain
No abstract available.
Authors
David C. Buesch, R.W. Spengler
Detailed correlation of lithostratigraphic and borehole geophysical log data for identifying contacts at Yucca Mountain
No abstract available.
Authors
David C. Buesch, R.W. Spengler
Development of a technically consistent, qualified lithostratigraphic data base for the Yucca Mountain Project
Studies of Yucca Mountain, Nevada, as a potential geologic nuclear-waste repository began in the late 1970s and continued to 1988 when the U. S. Nuclear Regulatory Commission determined that the quality assurance (QA) programs in place were not adequate and demanded restructuring to a new QA program. The new QA program was accepted in 1989, but many activities did not resume until new procedures w
Authors
David C. Buesch, R.W. Spengler, M.S. Witkowski, S.M. Keller