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.
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At-sea threats to Xantus' murrelets (Synthliborampus hypoleucus) in the Southern California Bight At-sea threats to Xantus' murrelets (Synthliborampus hypoleucus) in the Southern California Bight
No abstract available at this time
Authors
H.R. Carter, D.L. Whitworth, John Y. Takekawa, T.W. Keeney, P.R. Kelly
Atmosphere-water interaction of chloroform, toluene, and MTBE in small perennial urban streams Atmosphere-water interaction of chloroform, toluene, and MTBE in small perennial urban streams
No abstract available.
Authors
David A. Bender, John S. Zogorski, Wentai Luo, James F. Pankow, Michael S. Majewski, Ronald J. Baker
Attenuation-difference radar tomography: Results of a multiple-plane experiment at the U.S. Geological Survey Fractured-Rock Research Site, Mirror Lake, New Hampshire Attenuation-difference radar tomography: Results of a multiple-plane experiment at the U.S. Geological Survey Fractured-Rock Research Site, Mirror Lake, New Hampshire
Attenuation-difference, borehole-radar tomography was used to monitor a series of sodium chloride tracer injection tests conducted within the FSE, wellfield at the U.S. Geological Survey Fractured-Rock Hydrology Research Site in Grafton County, New Hampshire, USA. Borehole-radar tomography surveys were conducted using the sequential-scanning and injection method in three boreholes that...
Authors
J.W. Lane, F. D. Day-Lewis, J.M. Harris, F.P. Haeni, S.M. Gorelick
Beach and reef-flat sediments along the south shore of Molokai, Hawaii Beach and reef-flat sediments along the south shore of Molokai, Hawaii
As part of the U.S. Geological Survey's multi-disciplinary Coral Reef Project addressing the health and geological variability of coral reef systems, sediment components and their distribution along the fringing reef on the south shore of the Hawaiian island of Molokai are being examined. Particular interest is being paid to the types and origin of sediment found on the reef. The south...
Authors
R.S. Calhoun, M.E. Field
Beach profile variation on Hawaiian carbonate beaches Beach profile variation on Hawaiian carbonate beaches
Beach profiles from selected Oahu and Maui beaches quantitatively document beach volume variation and change between 1994 and 1999. Along exposed, high-energy beaches, large fluctuations in beach volume, characterized primarily by the formation and erosion of extensive berms, dominate the seasonal changes. Beaches along more protected stretches of coastline show much less variation in...
Authors
A. E. Gibbs, B. M. Richmond, C. H. Fletcher
Biotic and abiotic degradation of 1,1,2,2-tetrachloroethane in wetland sediments: Geochemical and microbial community analyses Biotic and abiotic degradation of 1,1,2,2-tetrachloroethane in wetland sediments: Geochemical and microbial community analyses
Additional microcosm experiments with the wetland sediment and groundwater at the Aberdeen Proving Ground, MD, site was presented to assist in elucidating the conditions under which these potentially competing biotic and abiotic degradation reactions for 1,1,2,2-tetrachloroethane (PCA) occur in the environment and to evaluate potential seasonal changes in degradation reactions. PCA...
Authors
M.M. Lorah, M.A. Voytek, J. Kirshtein
Block coals from Indiana: Inferences on changing depositional environment Block coals from Indiana: Inferences on changing depositional environment
Significant differences in coal petrography, palynology and coal quality were found between the Lower Block and Upper Block Coal Members (Brazil Formation, Pennsylvanian) in Daviess County, Indiana. The Lower Block Coal Member ranges in thickness from 51 to 74 cm and the Upper Block Coal Member ranges from 20 to 65 cm. Average sulfur content and ash yield of the Lower Block coal (0.98%...
Authors
Maria Mastalerz, P.L. Padgett, C.F. Eble
Blue tilapia, Orechromis aureus, predation on native fishes of the Muddy River, Nevada Blue tilapia, Orechromis aureus, predation on native fishes of the Muddy River, Nevada
No abstract available
Authors
G.G. Scoppettone, J.A. Salgado, M.B. Nielsen
Borehole-wall imaging with acoustic and optical televiewers for fractured-bedrock aquifer investigations Borehole-wall imaging with acoustic and optical televiewers for fractured-bedrock aquifer investigations
Imaging with acoustic and optical televiewers results in continuous and oriented 360 degree views of the borehole wall from which the character and orientation of lithologic and structural features can be defined for fractured-bedrock aquifer investigations. Fractures are more clearly defined under a wider range of conditions on acoustic images than on optical images including dark...
Authors
John Williams, Carole D. Johnson
Characterization and disinfection by-product formation potential of natural organic matter in surface and ground waters from Northern Florida Characterization and disinfection by-product formation potential of natural organic matter in surface and ground waters from Northern Florida
Streamwaters in northern Florida have large concentrations of natural organic matter (NOM), and commonly flow directly into the ground water system through karst features, such as sinkholes. In this study NOM from northern Florida stream and ground waters was fractionated, the fractions characterized by infrared (IR) and nuclear magnetic resonance (NMR), and then chlorinated to...
Authors
Colleen E. Rostad, Jerry A. Leenheer, Brian Katz, Barbara S. Martin, Ted I. Noyes
Charismatic megafauna or exotic pest? Interactions between popular perceptions of feral horses (Equus caballus) and their management and research Charismatic megafauna or exotic pest? Interactions between popular perceptions of feral horses (Equus caballus) and their management and research
No abstract available.
Authors
E.A. Beever, P. F. Brussard
Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain
No abstract available.
Authors
Peter D. Warwick, John R. SanFilipo, Jason C. Willett, Steven M. Podwysocki