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.
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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 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. Well data assembled for the 41 wells include: well logs, core descriptions and measurements, formation tops, biostratigraphic boundaries, drill-stem tests,
Authors
Philip H. Nelson, Christopher J. Schenk, Kenneth J. Bird
Biomarker generation from Type II-S kerogens in claystone and limestone during hydrous and anhydrous pyrolysis
A claystone and a limestone containing immature Type II-S kerogen were thermally matured in the presence and absence of water, to study the influence of water and clay minerals on the generation of biomarkers. In contrast to hydrous pyrolysis, anhydrous pyrolysis of the claystone did not generate biomarkers, which resulted in the loss of important information. Desulfurization of the polar fraction
Authors
M.P. Koopmans, F.C. Carson, Damste J.S. Sinninghe, M. D. Lewan
Channel stability of Turkey Creek, Nebraska
Channelization on Turkey Creek and its receiving stream, the South Fork Big Nemaha River, has disturbed the equilibrium of Turkey Creek and has led to channel-stability problems, such as degradation and channel widening, which pose a threat to bridges and land adjacent to the stream. As part of a multiagency study, the U.S. Geological Survey assessed channel stability at two bridge sites on upper
Authors
David L. Rus, Philip J. Soenksen
Characteristics of strippable Fort Union coals in the northern Rocky Mountains and Great Plains region
No abstract available.
Authors
Romeo M. Flores, L.R. Bader, V.V. Cavaroc, M.S. Ellis, G. Gunther, R. Johnson, C. W. Keighin, D. Likaresh, D. J. Nichols, A. Ochs, S. B. Roberts, G. D. Stricker, K. I. Takahashi, T. Taber, Peter D. Warwick, G. Govern, E.C. Murphy, E. Wilde
Comparative sequence stratigraphy of low-latitude versus high-latitude lacustrine rift basins: Seismic data examples from the East African and Baikal rifts
Lakes Baikal, Malawi and Tanganyika are the world's three largest rift valley lakes and are the classic modem examples of lacustrine rift basins. All the rift lakes are segmented into half-graben basins, and seismic reflection datasets reveal how this segmentation controls the filling of the rift basins through time. In the early stages of rifting, basins are fed primarily by flexural margin and a
Authors
C.A. Scholz, T.C. Moore, D. R. Hutchinson, A. Ja Golmshtok, Kim D. Klitgord, A.G. Kurotchkin
Comparison of erosion and channel characteristics
Erosion was observed at 33 percent of 22,495 bridge sites in nine States. Among sites with erosion, 56 percent were associated with skewed flows, curved channels, or a combination of these two conditions, and at 18 percent of the sites, channels were straight with steep bank angles. The remaining 26 percent are sites with observable erosion at piers or abutments on straight channels. Comparison of
Authors
Gene W. Parker
Consideration of measurement error when using commercial indoor radon determinations for selecting radon action levels
An examination of year-long, in-home radon measurement in Colorado from commercial companies applying typical methods indicates that considerable variation in precision exists. This variation can have a substantial impact on any mitigation decisions, either voluntary or mandated by law, especially regarding property sale or exchange. Both long-term exposure (nuclear track greater than 90 days), an
Authors
G. M. Reimer, S.L. Szarzi, Michael P. Dolan
Coral reefs and global change: Adaptation, acclimation, or extinction?
[No abstract available]
Authors
R. W. Buddemeier
Cotton herbicides in the surface waters of the Mississippi Alluvial Plain (the Delta)
The U.S. Geological Survey is conducting two studies to assess the environmental fate of herbicides used in cotton producing areas of the southeastern United States. The first study is evaluating surface-water quality on a regional basis and relating water quality to land use. The second study is examining the use of Best Management Practices to reduce off-site movement of agricultural chemicals i
Authors
R.H. Coupe, R.A. Rebich
Detailed scour measurements around a debris accumulation
Detailed scour measurements were made at Farm-Market 2004 over the Brazos River near Lake Jackson, Tex. during flooding in October 1994. Woody debris accumulations on bents 6, 7, and 8 obstructed flow through the bridge, causing scour of the streambed. Measurements at the site included three-dimensional velocities, channel bathymetry, water-surface elevations, water-surface slope, and discharge. C
Authors
David S. Mueller, Arthur C. Parola
Developing a habitat-driven approach to CWWT design
A habitat-driven approach to CWWT design is defined as designing the constructed wetland to maximize habitat values for a given site within the constraints of meeting specified treatment criteria. This is in contrast to the more typical approach of designing the CWWT to maximize treatment efficiency, and then, perhaps, adding wildlife habitat features. The habitat-driven approach is advocated for
Authors
James J. Sartoris, Joan S. Thullen
Ecological monitoring for the Northwest Forest Plan: A comparison to other major ecosystem initiatives
No abstract available.
Authors
D.E. Busch