Investigation of mass wasting on the continental slope and rise

Silva, A.J.; Baxter, Christopher; LaRosa, Paul; Bryant, William R.

doi:10.1016/s0025-3227(03)00315-3

Cited by 14 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silva et al, 2004). Based on integrated interpretation of highresolution acoustic and bathymetric data, a representative profile across the western margin of the main slide debris within the Sophia Basin has been chosen as a key profile for establishment of a chronology.…”

Section: Chronologymentioning

confidence: 99%

Dynamics and timing of the Hinlopen/Yermak Megaslide north of Spitsbergen, Arctic Ocean

et al. 2008

View full text Add to dashboard Cite

Section: Chronologymentioning

confidence: 99%

Dynamics and timing of the Hinlopen/Yermak Megaslide north of Spitsbergen, Arctic Ocean

et al. 2008

View full text Add to dashboard Cite

“…Large overburden pressures created by sediment accumulation from the late Jurassic to the present have caused the underlying salt sheet to flow and sometimes extrude toward the surface. The movement of the salt sheet, or halokenesis, is largely responsible for the surface morphology (Silva et al, 2004).…”

Section: Diapirismmentioning

confidence: 99%

“…33d). The largest failures occur in the Gulf of Mexico, adjacent to Mississippi Canyon and between salt withdrawal basins (McGregor et al, 1993;Silva et al, 2004). Smaller landslides occur within the basins, and at the base of the Sigsbee Escarpment (Orange et al, 2003;Young et al, 2003).…”

Section: Submarine Landslide Geomorphologymentioning

confidence: 99%

Submarine Mass Movements on Continental Margins

Lee

Locat

Desgagnés

et al. 2007

Continental Margin Sedimentation

View full text Add to dashboard Cite

Submarine landslides can be important mechanisms for transporting sediment down sloping seabeds. They occur when stresses acting downslope exceed the available strength of the seabed sediments. Landslides occur preferentially in particular environments, including fjords, active river deltas, submarine canyons, volcanic islands and, to a lesser extent, the open continental slope. Evaluating the relative stability of different seabeds requires an understanding of driving stresses and sediment strength. Stresses can be caused by gravity, earthquakes and storm waves. Resisting strength can be reduced by pore water and gas pressures, groundwater seepage, rapid sediment deposition, cyclic loading and human activity. Once slopes have become unstable or have failed, strength may continue to decrease, leading to sediment debris flows and possibly turbidity currents. Recent submarine landslide research has: shown that landslides and sediment waves may generate similar deposits, which require careful interpretation; expanded our knowledge of how strength develops in marine sediment; improved techniques for predicting sediment rheology; and developed methodologies for mapping and predicting the medium-to large-scale regional occurrence of submarine landslides.

show abstract

“…Different limit equilibrium slope stability models were used depending on the type of sediment found along each transect. Failures in sandy sediments tend to be shallow and translational (i.e., in non-cohesive sediments), while clayey sediments tend to have deep rotational failures (i.e., slumps in cohesive sediments; Silva et al 2004;Baxter et al 2003;Soltau 2003). For selected cases the results of the MCS model have been verified using a commercial slope stability software package (Slope/W).…”

Section: Development and Validation Of Mcs Modelmentioning

confidence: 99%

Probabilistic Smf Tsunami Hazard Assessment For The Upper East Coast Of The United States

Maretzki

Grilli

Baxter

2007

Submarine Mass Movements and Their Consequences

View full text Add to dashboard Cite

The level of tsunami hazard to the east coast of the United States is not well understood. This information is critical for the population, emergency services, and industry of the region. Assessing this hazard is particularly difficult because of the lack of tsunamis in the historical record and the uncertainty regarding the return periods of large-scale events that have been proposed, such as a large transoceanic tsunami possibly caused by a collapse of the Cumbre Vieja volcano in the Canary Islands, or a large coseismic tsunami initiated in the Puerto Rican subduction zone. The most significant tsunami hazard in this region, however, may be due to local submarine mass failures (SMF), which could cause concentrated damage in coastal communities located near the failures. This paper presents results of a probabilistic analysis that estimates the hazard, expressed in terms of runup (at a given probability of occurrence), of SMF tsunamis triggered by earthquakes, on the upper northeast coast of the United States. A Monte Carlo approach is employed, in which distributions of relevant parameters (seismicity, sediment properties, type and location of slide, volume of slide, water depth, etc.) are used to perform large numbers of stochastic stability analyses of underwater slopes, based on standard geotechnical methods. When slope failure occurs, initial tsunami characteristic height and runup are estimated, based on earlier numerical work, for specified return periods of seismic events. The overall hazard associated with SMF tsunamis along the coast is found to be quite low at most locations as compared, e.g., to the typical 100 year hurricane storm surge in the region (5 m). Two sites, however, located off of Long Island, New York and Atlantic City, New Jersey, show an elevated risk of higher tsunami runup (5.0-7.5 m). These two sites should be the focus of more detailed studies.

show abstract

Investigation of mass wasting on the continental slope and rise

Cited by 14 publications

References 13 publications

Dynamics and timing of the Hinlopen/Yermak Megaslide north of Spitsbergen, Arctic Ocean

Dynamics and timing of the Hinlopen/Yermak Megaslide north of Spitsbergen, Arctic Ocean

Submarine Mass Movements on Continental Margins

Probabilistic Smf Tsunami Hazard Assessment For The Upper East Coast Of The United States

Contact Info

Product

Resources

About