Publications
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USGS Publications Warehouse
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Sound Waves Newsletter
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Filter Total Items: 1741
Morphology and stratal geometry of the Antarctic continental shelf: Insights from models Morphology and stratal geometry of the Antarctic continental shelf: Insights from models
Reconstruction of past ice-sheet fluctuations from the stratigraphy of glaciated continental shelves requires understanding of the relationships among the stratal geometry, glacial and marine sedimentary processes, and ice dynamics. We investigate the formation of the morphology and the broad stratal geometry of topsets on the Antarctic continental shelf with numerical models. Our models...
Authors
Alan K. Cooper, Peter F. Barker, Giuliano Brancolini
Modeling waves and circulation in Lake Pontchartrain, Louisiana Modeling waves and circulation in Lake Pontchartrain, Louisiana
The U.S. Geological Survey is conducting a study of storm-driven sediment resuspension and transport in Lake Pontchartrain, Louisiana. Two critical processes related to sediment transport in the lake are (1) the resuspension of sediments due to wind-generated storm waves and (2) the movement of resuspended material by lake currents during storm wind events. The potential for sediment...
Authors
Richard P. Signell, Jeffrey H. List
Lateral trapping of sediment in partially mixed estuary Lateral trapping of sediment in partially mixed estuary
No abstract available.
Authors
W. R. Geyer, R. P. Signell, G. C. Kineke
Reply to comment by R. Anderson on "Uranium-series disequilibrium, sedimentation, diatom frustules, and paleoclimate change in Lake Baikal" Reply to comment by R. Anderson on "Uranium-series disequilibrium, sedimentation, diatom frustules, and paleoclimate change in Lake Baikal"
No abstract available.
Authors
D. N. Edgington, J. A. Robbins, S.M. Colman, K. A. Orlandini, M. P. Gustin, J. V. Klump, L. Z. Granina
Roadblocks on the kill curve: Testing the Raup hypothesis Roadblocks on the kill curve: Testing the Raup hypothesis
The documented presence of two large (~100-km diameter), possibly coeval impact craters of late Eocene age, requires modification of the impact-kill curve proposed by David M. Raup. Though the estimated meteorite size for each crater alone is large enough to have produced considerable global environmental stress, no horizons of mass mortality or pulsed extinction are known to be...
Authors
C. W. Poag
A preliminary investigation of siliceous microfossil succession in late quaternary sediments from Lake Baikal, Siberia A preliminary investigation of siliceous microfossil succession in late quaternary sediments from Lake Baikal, Siberia
Siliceous microfossil assemblage succession was analyzed in a 100 m sediment core from Lake Baikal, Siberia. The core was recovered from the lake's central basin at a water depth of 365 m. Microfossil abundance varied greatly within the intervals sampled, ranging from samples devoid of siliceous microfossils to samples with up to 3.49 x 1011 microfossils g-1 sediment. Fluctuations in...
Authors
M. L. Julius, E. F. Stoermer, S.M. Colman, T. C. Moore
Bathymetric comparisons adjacent to the Louisiana barrier islands: Processes of large-scale change Bathymetric comparisons adjacent to the Louisiana barrier islands: Processes of large-scale change
This paper summarizes the results of a comparative bathymetric study encompassing 150 km of the Louisiana barrier-island coast. Bathymetric data surrounding the islands and extending to 12 m water depth were processed from three survey periods: the 1880s, the 1930s, and the 1980s. Digital comparisons between surveys show large-scale, coherent patterns of sea-floor erosion and accretion...
Authors
J. H. List, B. E. Jaffe, A. H. Sallenger, M. E. Hansen
Physical processes affecting the sedimentary environments of Long Island Sound Physical processes affecting the sedimentary environments of Long Island Sound
A modeling study was undertaken to simulate the bottom tidal-, wave-, and wind-driven currents in Long Island Sound in order to provide a general physical oceanographic framework for understanding the characteristics and distribution of seafloor sedimentary environments. Tidal currents are important in the funnel-shaped eastern part of the Sound, where a strong gradient of tidal-current...
Authors
R. P. Signell, H.J. Knebel, J. H. List, A.S. Farris
Mapping the sea floor geology offshore of the New York-New Jersey metropolitan area using sidescan-sonar: Preliminary report Mapping the sea floor geology offshore of the New York-New Jersey metropolitan area using sidescan-sonar: Preliminary report
No abstract available.
Authors
William C. Schwab, W. Corso, M. A. Allison, B. Butman, J. F. Denny, L. Lotto, W. W. Danforth, D.S. Foster, T.F. O’Brien, D. A. Nichols, B.J. Irwin, K. F. Parolski
The wind-forced response on a buoyant coastal current: Observations of the western Gulf of Maine plume The wind-forced response on a buoyant coastal current: Observations of the western Gulf of Maine plume
The Freshwater plume in the western Gulf of Maine is being studied as part of an interdisciplinary investigation of the physical transport of a toxic alga. A field program was conducted in the springs of 1993 and 1994 to map the spatial and temporal patterns of salinity, currents and algal toxicity. The observations suggest that the plume's cross-shore structure varies markedly as a...
Authors
D.A. Fong, W.R. Geyer, R. P. Signell
The Chesapeake Bay bolide impact: A convulsive event in Atlantic Coastal Plain evolution The Chesapeake Bay bolide impact: A convulsive event in Atlantic Coastal Plain evolution
Until recently, Cenozoic evolution of the Atlantic Coastal Plain has been viewed as a subcyclical continuum of deposition and erosion. Marine transgressions alternated with regressions on a slowly subsiding passive continental margin, their orderly succession modified mainly by isostatic adjustments, occasional Appalachian tectonism, and paleoclimatic change. This passive scenario was...
Authors
C. Wylie Poag