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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Using tsunami deposits to improve assessment of tsunami risk Using tsunami deposits to improve assessment of tsunami risk
In many places in the world the written record of tsunamis is too short to accurately assess the risk of tsunamis. Sedimentary deposits left by tsunamis can be used to extend the record of tsunamis to improve risk assessment. The two primary factors in tsunami risk, tsunami frequency and magnitude, can be addressed through field and modeling studies of tsunami deposits. Recent advances...
Authors
B. E. Jaffe, G. Gelfenbaum
Variability of suspended-sediment concentration at tidal to annual time scales in San Francisco Bay, USA Variability of suspended-sediment concentration at tidal to annual time scales in San Francisco Bay, USA
Singular spectrum analysis for time series with missing data (SSAM) was used to reconstruct components of a 6-yr time series of suspended-sediment concentration (SSC) from San Francisco Bay. Data were collected every 15 min and the time series contained missing values that primarily were due to sensor fouling. SSAM was applied in a sequential manner to calculate reconstructed components...
Authors
D. H. Schoellhamer
Velocity and Sediment Concentration Measurements over Bedforms in Sand-Bed Rivers Velocity and Sediment Concentration Measurements over Bedforms in Sand-Bed Rivers
Bedforms often are present on the bed of alluvial sand-bed rivers. Bedforms, such as dunes, impact the flow field. In this field study, velocity and suspended-sediment concentration measurements were made longitudinally along a dune field in large (5-15 meters deep) alluvial sand-bed rivers. The velocity and suspended-sediment concentration data was collected using an acoustic Doppler...
Authors
Robert R. Holmes, M.H. Garcia
X-ray Computed Tomography Observation of Methane Hydrate Dissociation X-ray Computed Tomography Observation of Methane Hydrate Dissociation
Deposits of naturally occurring methane hydrate have been identified in permafrost and deep oceanic environments with global reserves estimated to be twice the total amount of energy stored in fossil fuels. The fundamental behavior of methane hydrate in natural formations, while poorly understood, is of critical importance if the economic recovery of methane from hydrates is to be...
Authors
L. Tomutsa, B. Freifeld, T.J. Kneafsey, L.A. Stern
Age constraints on fluid inclusions in calcite at Yucca Mountain Age constraints on fluid inclusions in calcite at Yucca Mountain
No abstract available.
Authors
Leonid A. Neymark, Yuri V. Amelin, James B. Paces, Zell E. Peterman, Joseph F. Whelan
Changes in density and height of the shrub baccharis halimifolia following burning in coastal tallgrass prairie Changes in density and height of the shrub baccharis halimifolia following burning in coastal tallgrass prairie
No abstract available.
Authors
Larry K. Allain, James B. Grace
Evidence for Mississippi Valley-type lead-zinc mineralization in the Cevennes region, Southern France, during Pyrenees orogeny Evidence for Mississippi Valley-type lead-zinc mineralization in the Cevennes region, Southern France, during Pyrenees orogeny
No abstract available.
Authors
D. Leach, Wayne R. Premo, M. Lewchuk, H. Rouvier, J.-C. Macquar, J. Thibieroz, B. Henry, M. Le Goff
Prairie Cajuns and the Cajun Prairie: A history Prairie Cajuns and the Cajun Prairie: A history
No abstract available.
Authors
Malcolm Vidrine, William R. Pontenot, Charles Allen, Bruno Borsari, Larry K. Allain
Lepidopteran and odonate communities in the Cajun Prairie ecosystem in southwestern Louisiana Lepidopteran and odonate communities in the Cajun Prairie ecosystem in southwestern Louisiana
No abstract available.
Authors
Malcolm Vidrine, Charles Allen, Bruno Borsari, Larry K. Allain
Road log and stop descriptions; Day 1, Stop 1; Delaware Water Gap; geologic overview, stratigraphy, structure, formation of the gap, and glacial geology Road log and stop descriptions; Day 1, Stop 1; Delaware Water Gap; geologic overview, stratigraphy, structure, formation of the gap, and glacial geology
No abstract available.
Authors
Jack B. Epstein
Structural relations along the Taconic unconformity between New York, New Jersey, and Pennsylvania Structural relations along the Taconic unconformity between New York, New Jersey, and Pennsylvania
No abstract available.
Authors
Jack B. Epstein, Peter T. Lyttle
Structural geology of the Delaware Water Gap National Recreation Area Structural geology of the Delaware Water Gap National Recreation Area
No abstract available.
Authors
Jack B. Epstein