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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Continental margins. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (559 pages)
    Edition: 1st ed.
    ISBN: 9780470766361
    Series Statement: International Association of Sedimentologists Series ; v.25
    DDC: 551.3/53
    Language: English
    Note: Intro -- Preface -- Writing a Rosetta stone: insights into continental-margin sedimentary processes and strata -- CHARLES A. NITTROUER*, JAMES A. AUSTIN JR†, MICHAEL E. FIELD‡, JOSEPH H. KRAVITZ, JAMES P.M. SYVITSKI¶ and PATRICIA L. WIBERG** -- INTRODUCTION -- THE BOUNDARY CONDITIONS -- THE COMMON THREADS -- Eel River (California) continental margin -- New Jersey continental margin -- SEDIMENT DELIVERY -- General considerations -- Delivery of Eel margin sediment -- SEDIMENT ALTERATION -- General considerations -- Alteration of Eel margin sediment -- SEDIMENT DISPERSAL SYSTEM -- General considerations -- Eel margin sediment dispersal system -- SEABED FAILURE -- General considerations -- Eel margin failure -- GRAVITY FLOWS -- General considerations -- MARGIN MORPHOLOGY -- General considerations -- New Jersey margin morphology -- Eel margin morphology -- MARGIN STRATIGRAPHY -- General considerations -- New Jersey margin stratigraphy -- Eel margin stratigraphy -- CONCLUSIONS -- ACKNOWLEDGEMENTS -- REFERENCES -- Sediment delivery to the seabed on continental margins -- PAUL S. HILL*, JASON M. FOX*, JOHN S. CROCKETT†, KRISTIAN J. CURRAN*, CARL T. FRIEDRICHS‡, W. ROCKWELL GEYER, TIMOTHY G. MILLIGAN¶, ANDREA S. OGSTON†, PERE PUIG**, MALCOLM E. SCULLY‡, PETER A. TRAYKOVSKI and ROBERT A. WHEATCROFT†† -- INTRODUCTION -- REVIEW OF PREVIOUS WORK -- Early conceptual models -- Sediment loss from discharge plumes -- Advective transport in river plumes -- Bottom-boundary-layer transport of flood sediment -- Summary of past research -- SEDIMENT DELIVERY TO THE EEL MARGIN -- Site description -- Observational programme -- Results -- Fate of missing sediment -- SUMMARY AND CONCLUSION -- Summary of STRATAFORM sediment delivery -- Questions for future research -- ACKNOWLEDGEMENTS -- NOMENCLATURE -- REFERENCES. , Post-depositional alteration and preservation of sedimentary strata -- ROBERT A. WHEATCROFT*, PATRICIA L. WIBERG†, CLARK R. ALEXANDER‡, SAMUEL J. BENTLEY, DAVID E. DRAKE¶, COURTNEY K. HARRIS** and ANDREA S. OGSTON†† -- INTRODUCTION AND SCOPE -- CONSOLIDATION -- Theoretical framework -- Observations -- PHYSICAL ALTERATION -- Fluid forcing -- Bed properties -- Deposition -- BIOLOGICAL ALTERATION -- Alteration of key dynamical bed properties -- Bioturbation -- Biogenic sedimentary structures -- PRESERVATION -- Controlling parameters -- Dissipation times -- The key role of episodic sedimentation -- SUMMARY -- ACKNOWLEDGEMENTS -- NOMENCLATURE -- REFERENCES -- Oceanic dispersal and accumulation of river sediment -- CHRISTOPHER K. SOMMERFIELD*, ANDREA S. OGSTON†, BETH L. MULLENBACH‡, DAVID E. DRAKE, CLARK R. ALEXANDER¶, CHARLES A. NITTROUER†, JEFFRY C. BORGELD**, ROBERT A. WHEATCROFT†† and ELANA L. LEITHOLD‡‡ -- INTRODUCTION -- Margin sediment dispersal systems: a Holocene perspective -- Research background -- QUANTIFYING SEDIMENTARY PROCESSES -- Suspended-sediment transport -- Sediment deposition and accumulation -- THE NORTHERN CALIFORNIA MARGIN -- Previous work and insight -- SEDIMENT PRODUCTION AND COASTAL DELIVERY -- Tectonics and sediment yield -- Hydroclimatology and recorded streamflow -- Floods, land use and sediment delivery -- Coastal ocean circulation -- SEDIMENT TRANSPORT AND ACCUMULATION -- Mechanisms of sediment transport -- Dynamic trapping mechanisms -- Static trapping mechanisms -- SEDIMENTATION PATTERNS AND RATES -- Sedimentary event deposition -- Centennial to millennial accumulation -- Latest Holocene sedimentary record -- Accumulation rates and stratigraphic completeness -- SEDIMENT BUDGETS OF DISPERSAL SYSTEMS -- Development of sediment budgets -- Eel margin sediment budget -- CONCLUSIONS -- ACKNOWLEDGEMENTS -- NOMENCLATURE. , REFERENCES -- Submarine mass movements on continental margins -- HOMA J. LEE*, JACQUES LOCAT†, PRISCILLA DESGAGNÉS†, JEFFREY D. PARSONS‡, BRIAN G. McADOO, DANIEL L. ORANGE¶, PERE PUIG**, FLORENCE L. WONG*, PETER DARTNELL* and ERIC BOULANGER† -- INTRODUCTION -- HISTORIC DEVELOPMENT OF UNDERSTANDING -- CLASSIFICATION -- ENVIRONMENTS -- Fjords -- Active river deltas on the continental shelf -- Submarine canyon-fan systems -- The open continental slope -- STATISTICS OF SUBMARINE LANDSLIDES -- MECHANICS OF SLOPE FAILURE -- Driving stress -- Resisting stress (strength) -- Slope stability analysis -- PORE-WATER PRESSURE -- SEDIMENT MOBILIZATION AND STRENGTH LOSS -- TRIGGERS -- Sediment accumulation -- Erosion -- Earthquakes -- Volcanoes -- Waves -- Gas and gas hydrates -- Groundwater seepage -- Diapirism -- Human activity -- CONTRIBUTIONS TO SUBMARINE LANDSLIDE RESEARCH FROM THE STRATAFORM PROJECT -- 'Humboldt Slide' controversy -- Liquefaction failures in Eel Canyon -- Gas charging and pore pressures -- Development of shear strength and rheology in marine sediment -- Submarine landslide geomorphology -- Regional mapping of landslide susceptibility -- SUMMARY -- Overall occurrence and triggers -- Controversies -- Importance of the liquidity index -- Pore pressures and the development of anomalously weak sediment -- Development of anomalously high strength -- Slope stability analysis and regional assessment of landslide susceptibility -- An important contribution -- ACKNOWLEDGEMENTS -- NOMENCLATURE -- REFERENCES -- The mechanics of marine sediment gravity flows -- JEFFREY D. PARSONS*, CARL T. FRIEDRICHS†, PETER A. TRAYKOVSKI‡, DAVID MOHRIG, JASIM IMRAN¶, JAMES P.M. SYVITSKI**, GARY PARKER††, PERE PUIG‡‡, JAMES L. BUTTLES and MARCELO H. GARCÍA†† -- INTRODUCTION -- TURBIDITY CURRENTS -- Basic mechanics -- Frontal dynamics -- Turbidity-current fans. , Channelization and channel processes -- Observations of turbidity currents -- DEBRIS FLOWS -- Basic mechanics -- Hydroplaning -- Advances in analytical and numerical solutions -- Observations of submarine debris flows -- WAVE-SUPPORTED SEDIMENT GRAVITY FLOWS -- Wave-boundary-layer mechanics -- Wave-supported sediment gravity flows and the role of buoyancy -- Vertical distribution of momentum and sediment concentration -- Observations of wave-supported sediment gravity flows -- ORIGIN AND TRANSFORMATION OF SEDIMENT GRAVITY FLOWS -- Failure-induced formation -- Wave/tide-induced formation -- Direct formation from river loading -- Linkages between phenomena -- CONCLUSIONS -- ACKNOWLEDGEMENTS -- NOMENCLATURE -- REFERENCES -- Seascape evolution on clastic continental shelves and slopes -- LINCOLN F. PRATSON*, CHARLES A. NITTROUER†, PATRICIA L. WIBERG‡, MICHAEL S. STECKLER, JOHN B. SWENSON¶, DAVID A. CACCHIONE**, JEFFERY A. KARSON*, A. BRADLEY MURRAY*, MATTHEW A. WOLINSKY*, THOMAS P. GERBER*, BETH L. MULLENBACH††, GLENN A. SPINELLI‡‡, CRAIG -- INTRODUCTION -- From bathymetry to seascape evolution -- Scope of paper -- BACKGROUND -- Physiographical definitions -- Historical interest in and importance of the continental shelf and slope -- PROCESSES GOVERNING SHELF WIDTH AND SLOPE RELIEF -- Plate tectonics and the stair-step shape of continental margins -- First-order effects of thermal subsidence and tectonic uplift -- Second-order effects of isostasy, compaction and faulting -- Added effects of faulting -- PROCESSES THAT FORM THE SHELF PROFILE -- Rivers, deltas and growth of the coastal plain -- Bedload deposition, sediment plumes and clinoforms -- The impacts of waves and currents on the shelf and shoreface profile -- Subaqueous deltas and wave-supported sediment gravity flows -- Independent movements of the shoreline and shelf break. , Shelf evolution during sea-level change -- PROCESSES THAT ACT TO LIMIT THE SLOPE OF THE CONTINENTAL SLOPE -- Seafloor failure and submarine groundwater flow -- Bottom shear from internal waves -- Turbidity-current erosion and deposition -- PROCESSES THAT CREATE SUBMARINE CANYONS AND SLOPE GULLIES -- Turbidity currents versus seafloor failure in forming submarine canyons -- Turbidity currents versus seafloor failure in forming slope gullies -- FUTURE RESEARCH -- ACKNOWLEDGEMENTS -- REFERENCES -- The long-term stratigraphic record on continental margins -- GREGORY S. MOUNTAIN*, ROBERT L. BURGER†, HEIKE DELIUS‡, CRAIG S. FULTHORPE, JAMIE A. AUSTIN, DAVID S. GOLDBERG¶, MICHAEL S. STECKLER¶, CECILIA M. McHUGH**, KENNETH G. MILLER*, DONALD H. MONTEVERDE*, DANIEL L. ORANGE†† and LINCOLN F. PRATSON‡‡ -- INTRODUCTION -- Distinguishing time-scales -- The importance of the long-term record -- Long-term geochronology: dating continental-margin records -- ANALYSING THE LONG-TERM RECORD -- Basin-wide surfaces and long-term processes -- Tools for accessing the long-term record -- THE EEL RIVER BASIN -- Tectonism - a major control of sediment distribution and preservation -- Offshore stratigraphy - local variations of governing processes -- Stratigraphic modelling -- THE NEW JERSEY MARGIN -- Cenozoic sedimentation on a passive margin -- Pleistocene sequences -- The last eustatic cycle and its preserved record -- New Jersey submarine canyons -- Stratigraphic modelling -- SUMMARY -- The long-term record: its challenges and rewards -- The Eel River Basin: difficulties in recognizing eustatic control -- The New Jersey margin: eustatic imprint, with complications -- The long-term record - where next? -- ACKNOWLEDGEMENTS -- REFERENCES -- Prediction of margin stratigraphy. , JAMES P.M. SYVITSKI*, LINCOLN F. PRATSON†, PATRICIA L. WIBERG‡, MICHAEL S. STECKLER, MARCELO H. GARCÍA¶, W. ROCKWELL GEYER**, COURTNEY K. HARRIS††, ERIC W.H. HUTTON*, JASIM IMRAN‡‡, HOMA J. LEE, MARK D. MOREHEAD¶¶ and GARY PARKER***.
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  • 2
    Type of Medium: Book
    Pages: S. 1867 - 2112 , graph. Darst
    Series Statement: Continental shelf research 28.2008,15
    Language: English
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  • 3
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of [publisher] for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 45 (2018): 5491-5500, doi:10.1029/2018GL078208.
    Description: Coastal bays and, specifically, back‐barrier tidal basins host productive ecosystems, coastal communities, and critical infrastructure. As sea level continues to rise and tropical cyclones increase in intensity, these coastal systems are increasingly at risk. Developing a sediment budget is imperative to understanding how storm events affect the system's resilience, where net import of sediment indicates growth and resilience against sea level rise, and net export of sediment indicates deterioration. Using high‐resolution numerical simulations, we show that intense storms import sediment into a system of bays in Virginia, USA. Duration and magnitude of storm surge are among the most important factors in sediment import, suggesting that intense storms increase the stability of tidal bays by providing the sediment necessary to counteract sea level rise. Since climate models project that tropical cyclones will increase in intensity in coming decades, our results have significant implications for the resilience of tidal bays and the future of coastal communities worldwide.
    Description: National Science Foundation Grant Numbers: NSF 1237733, NSF 1637630, NSF 163630
    Description: 2018-11-21
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 4
    Publication Date: 2022-05-25
    Description: This paper is not subject to U.S. copyright. The definitive version was published in Continental Shelf Research 30 (2010): 761-780, doi:10.1016/j.csr.2010.01.011.
    Description: Sediment transport and the potential for erosion or deposition have been investigated on the Palos Verdes (PV) and San Pedro shelves in southern California to help assess the fate of an effluent-affected deposit contaminated with DDT and PCBs. Bottom boundary layer measurements at two 60-m sites in spring 2004 were used to set model parameters and evaluate a one-dimensional (vertical) model of local, steady-state resuspension, and suspended-sediment transport. The model demonstrated skill (Brier scores up to 0.75) reproducing the magnitudes of bottom shear stress, current speeds, and suspended-sediment concentrations measured during an April transport event, but the model tended to underpredict observed rotation in the bottom-boundary layer, possibly because the model did not account for the effects of temperature–salinity stratification. The model was run with wave input estimated from a nearby buoy and current input from four to six years of measurements at thirteen sites on the 35- and 65-m isobaths on the PV and San Pedro shelves. Sediment characteristics and erodibility were based on gentle wet-sieve analysis and erosion-chamber measurements. Modeled flow and sediment transport were mostly alongshelf toward the northwest on the PV shelf with a significant offshore component. The 95th percentile of bottom shear stresses ranged from 0.09 to 0.16 Pa at the 65-m sites, and the lowest values were in the middle of the PV shelf, near the Whites Point sewage outfalls where the effluent-affected layer is thickest. Long-term mean transport rates varied from 0.9 to 4.8 metric tons m−1 yr−1 along the 65-m isobaths on the PV shelf, and were much higher at the 35-m sites. Gradients in modeled alongshore transport rates suggest that, in the absence of a supply of sediment from the outfalls or PV coast, erosion at rates of not, vert, similar0.2 mm yr−1 might occur in the region southeast of the outfalls. These rates are small compared to some estimates of background natural sedimentation rates (not, vert, similar5 mm yr−1), but do not preclude higher localized rates near abrupt transitions in sediment characteristics. However, low particle settling velocities and strong currents result in transport length-scales that are long relative to the narrow width of the PV shelf, which combined with the significant offshore component in transport, means that transport of resuspended sediment towards deep water is as likely as transport along the axis of the effluent-affected deposit.
    Description: These studies were funded by the US Environmental Protection Agency Palos Verdes Super fund remediation project
    Keywords: Sediment transport ; Erodibility ; DDT ; PCBs ; Numerical model ; USA ; California ; Palos Verdes
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 5
    Publication Date: 2022-05-26
    Description: Author Posting. © The Authors, 2006. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Continental Shelf Research 27 (2007): 375-399, doi:10.1016/j.csr.2005.07.008.
    Description: A mooring and tripod array was deployed from the fall of 2002 through the spring of 2003 on the Po prodelta to measure sediment transport processes associated with sediment delivered from the Po River. Observations on the prodelta revealed wave-supported gravity flows of high concentration mud suspensions that are dynamically and kinematically similar to those observed on the Eel shelf (Traykovski et al., 2000). Due to the dynamic similarity between the two sites, a simple one-dimensional across-shelf model with the appropriate bottom boundary condition was used to examine fluxes associated with this transport mechanism at both locations. To calculate the sediment concentrations associated with the wave-dominated and wave-current resuspension, a bottom boundary condition using a reference concentration was combined with an “active layer” formulation to limit the amount of sediment in suspension. Whereas the wave-supported gravity flow mechanism dominates the transport on the Eel shelf, on the Po prodelta flux due to this mechanism is equal in magnitude to transport due to wave resuspension and wind-forced mean currents in cross-shore direction. Southward transport due to wave resuspension and wind forced mean currents move an order of magnitude more sediment along-shore than the downslope flux associated wave-supported gravity flows.
    Description: This work funded by the U.S. Office of Naval Research under grant number #N00014-02-10378, under the direction of program manager, Tom Drake.
    Keywords: Po River ; Adriatic Sea ; Sediment transport ; Turbidity currents ; Fluid mud
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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