U.S. national marine sanctuaries are federally designated marine protected areas that are often l... more U.S. national marine sanctuaries are federally designated marine protected areas that are often located in highly productive waters. This makes these sanctuaries important to a diverse, economically vital human user community and for biodiversity conservation. As a result, appropriate sanctuary management must balance conflicting goals. Fortunately, sanctuaries have been early adapters in marine planning. Marine planning is a transparent, ecosystem-based, science-driven decision making process developed with a high level of stakeholder and public involve-ment. As established marine planning practitioners, national marine sanctuaries can provide valuable case studies and insights. Marine Planning in Action for example, the National Oceanic and Atmospheric Administration's (NOAA) Stellwagen Bank National Marine Sanctuary, an 852-square-mile marine pro-tected area located off the coast of Massachusetts and New Hampshire, hosts some of the largest aggrega-tions of endangered large w...
Dynamic Ocean Management (DOM) requires the rapid dissemination of accurate and complex spatial/t... more Dynamic Ocean Management (DOM) requires the rapid dissemination of accurate and complex spatial/temporal information in a form that is easily understood by target audiences. Whale Alert is a free mobile app (supported by a cloud-based data infrastructure) designed to provide comprehensive and immediate information to mariners relative to endangered whale conservation and management. Its goal is to reduce the risk of collisions between endangered whales and ships, a major source of large whale mortality. Information, including the operating ship’s location, speed restriction zones, International Maritime Organization sanctioned Areas to be Avoided, recommended routes, acoustic whale detections, short term animal aggregations and individual whale sightings are visualized on digital nautical charts that can be updated in near-real time. Additional information, such as weather and, for some ports, tidal and wind conditions provide added benefits to mariners. Mariners and other users can...
Abstract. What does the marine Automatic Identification System (AIS) vessel tracking mean for mar... more Abstract. What does the marine Automatic Identification System (AIS) vessel tracking mean for mariners at sea and operations staff on shore during emergency response operations? Real-time AIS and e-Navigation related technologies enable closer coordination between ...
ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controver... more ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controversy. Some researchers argue that it is a slide deposit, while others interpret the deposit as a depositional feature mantling an old slide scar formed by down-slope gravity flows. We adapted the standard paleomagnetic tool of Anisotropy of Magnetic Susceptibility \(AMS\) in order to detect minor post-depositional deformation \(i.e., "crypto-slumps"\) in sedimentary successions and applied it to the Humboldt Slide controversy. Crypto-slumps are slumps that are not easily observed in outcrop or core samples. Undeformed sediments show a typical oblate fabric while even slightly deformed sediments develop a triaxial fabric. Based on examining cores from the center and top of the Humboldt Slide structure, we find no evidence for deformation. The cores from the top are in an area that is clearly free from drape and thus we can be sure that we are sampling the structure seen in chirp seismics. We recently sampled a known slide for comparison to the Humboldt Slide. We used 5 gravity cores from the USGS V1-81-SC cruise which sampled the Gaviota Slide. The Gaviota Slide in on the northern slope of the Santa Barbara Basin and is just to the west of the much larger Golita Slide. The AMS measurements from the Gaviota Slide show a clearly deformed fabric that we expect from a slide. From these analyses we found that the fabric is dominantly oblate for the Humboldt Slide while the Gaviota Slide is predominantly triaxial. Based on these results, we re-emphasize our conclusion that the Humboldt Slide is not a slide. We now know that the ridges and swales of the Humboldt Slide appear to have grown as sediment waves on an old slide scar and our chirp seismics show thickening on the upslope side of these structures and continuous reflectors across regions where others have mapped normal faults.
During the last year, we have collected six gravity cores from the northern side of the Santa Bar... more During the last year, we have collected six gravity cores from the northern side of the Santa Barbara Basin for paleomagnetic deformation tests. The first two cores were collected on the smaller Gaviota Slide on the western side of the basin. These cores provide the slump end member, since one core comes from the evacuated zone while the other comes from the toe or accumulation zone. Two additional cores were collected on the toes of the much older Goleta Slides and were designed to provide an undeformed reference fabric; it was our hope that they would be mostly pelagic drape but also penetrate into the top of the deformed material. One core appears to be an excellent reference core with clear laminations, while the other has distorted laminations that show the sediment has undergone some type of deformation. In between the two slides, we collected two cores on either side of the crack that runs between the two slides to investigate creep and slope stability. All cores have been sampled at a 3 cm interval with 8cc cubes to measure anisotropy of magnetic susceptibility (AMS) and AF demagnetiziation. The Gaviota slide sediments show a dominantly triaxial fabric with some alignment of the maximum eigen values, while the drape materials from the Goleta Slide show a typical oblate undeformed fabric. There are hints of deformation at major clay layers, which we continue to investigate. Several of these cores appear to show a biogentic component to the AMS signal that fades with depth. This component has a tendency to mask the deformation signal in the top sections of the cores. The NRM inclinations of the deformed core regions tend to be shallow and erratic showing what look at first glance to be excursional features.
ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controver... more ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controversy.Some researchers argue that it is a slide deposit, while others interpret thedeposit as a depositional feature mantling an old slide scar formed bydown-slope gravity flows. We recently adapted the standard paleomagnetic toolof Anisotropy of Magnetic Susceptibility (AMS) in order to detect minorpost-depositional deformation (i.e., "crypto-slumps") in sedimentarysuccessions and applied it to the Humboldt Slide controversy. Crypto-slumps are slumps that are not easily observed in outcrop or coresamples. Undeformed sediments show a typical oblate fabric while even slightlydeformed sediments develop a triaxial fabric. In the winter of 2001, weacquired 5 large diameter piston cores from the Humboldt Slide, NorthernCalifornia based on a previous chirp seismic survey collected as part of theSTRATAFORM project. The cores were acquired in two groups with the first beinglocated in the center of the Humboldt Slide covering the upslope and downslopelimb of one of the structures with one core located between the twostructures. The second group of cores is located upslope near the top of theso-called Humboldt complex. Both groups are located in the extensional regimeif this deposit is indeed a slump in an area morphologically described as theridges and swales by Gardner et al. (1999). We measured the AMS on a total of293 samples down-core and from these analyses we found that fabric wasdominantly oblate except in regions that had experienced flow-in from thepiston coring process. Based on these results, we conclude that the HumboldtSlide is not a slide. The ridges and swales appear to have grown as sedimentwaves on an old slide scar. We have corroborated this model with furtheranalysis of our chirp seismics which show thickening on the upslope side ofthese structures and continuous reflectors across regions where others havemapped normal faults. Gardner, J.V., Prior, D.B., Field, M.E., 1999, Humboldt Slide - a largeshear-dominated retrogressive slope failure, Marine Geology, v. 154, 323-338.
With the successful landing of the Phoenix Mars Lander comes the task of visualizing the spacecra... more With the successful landing of the Phoenix Mars Lander comes the task of visualizing the spacecraft, its operations and surrounding environment. The JPL Solar System Visualization team has brought together a wide range of talents and software to provide a suit of ...
NOAA's Nation... more NOAA's National Geophysical Data Center (NGDC) provides the deep archive of US multibeam sonar hydrographic surveys. NOAA stores the data as Bathymetric Attributed Grids (BAG; http://www.opennavsurf.org/) that are HDF5 formatted files containing gridded bathymetry, gridded uncertainty, and XML metadata. While NGDC provides the deep store and a basic ERSI ArcIMS interface to the data, additional tools need to be created
U.S. national marine sanctuaries are federally designated marine protected areas that are often l... more U.S. national marine sanctuaries are federally designated marine protected areas that are often located in highly productive waters. This makes these sanctuaries important to a diverse, economically vital human user community and for biodiversity conservation. As a result, appropriate sanctuary management must balance conflicting goals. Fortunately, sanctuaries have been early adapters in marine planning. Marine planning is a transparent, ecosystem-based, science-driven decision making process developed with a high level of stakeholder and public involve-ment. As established marine planning practitioners, national marine sanctuaries can provide valuable case studies and insights. Marine Planning in Action for example, the National Oceanic and Atmospheric Administration's (NOAA) Stellwagen Bank National Marine Sanctuary, an 852-square-mile marine pro-tected area located off the coast of Massachusetts and New Hampshire, hosts some of the largest aggrega-tions of endangered large w...
Dynamic Ocean Management (DOM) requires the rapid dissemination of accurate and complex spatial/t... more Dynamic Ocean Management (DOM) requires the rapid dissemination of accurate and complex spatial/temporal information in a form that is easily understood by target audiences. Whale Alert is a free mobile app (supported by a cloud-based data infrastructure) designed to provide comprehensive and immediate information to mariners relative to endangered whale conservation and management. Its goal is to reduce the risk of collisions between endangered whales and ships, a major source of large whale mortality. Information, including the operating ship’s location, speed restriction zones, International Maritime Organization sanctioned Areas to be Avoided, recommended routes, acoustic whale detections, short term animal aggregations and individual whale sightings are visualized on digital nautical charts that can be updated in near-real time. Additional information, such as weather and, for some ports, tidal and wind conditions provide added benefits to mariners. Mariners and other users can...
Abstract. What does the marine Automatic Identification System (AIS) vessel tracking mean for mar... more Abstract. What does the marine Automatic Identification System (AIS) vessel tracking mean for mariners at sea and operations staff on shore during emergency response operations? Real-time AIS and e-Navigation related technologies enable closer coordination between ...
ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controver... more ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controversy. Some researchers argue that it is a slide deposit, while others interpret the deposit as a depositional feature mantling an old slide scar formed by down-slope gravity flows. We adapted the standard paleomagnetic tool of Anisotropy of Magnetic Susceptibility \(AMS\) in order to detect minor post-depositional deformation \(i.e., "crypto-slumps"\) in sedimentary successions and applied it to the Humboldt Slide controversy. Crypto-slumps are slumps that are not easily observed in outcrop or core samples. Undeformed sediments show a typical oblate fabric while even slightly deformed sediments develop a triaxial fabric. Based on examining cores from the center and top of the Humboldt Slide structure, we find no evidence for deformation. The cores from the top are in an area that is clearly free from drape and thus we can be sure that we are sampling the structure seen in chirp seismics. We recently sampled a known slide for comparison to the Humboldt Slide. We used 5 gravity cores from the USGS V1-81-SC cruise which sampled the Gaviota Slide. The Gaviota Slide in on the northern slope of the Santa Barbara Basin and is just to the west of the much larger Golita Slide. The AMS measurements from the Gaviota Slide show a clearly deformed fabric that we expect from a slide. From these analyses we found that the fabric is dominantly oblate for the Humboldt Slide while the Gaviota Slide is predominantly triaxial. Based on these results, we re-emphasize our conclusion that the Humboldt Slide is not a slide. We now know that the ridges and swales of the Humboldt Slide appear to have grown as sediment waves on an old slide scar and our chirp seismics show thickening on the upslope side of these structures and continuous reflectors across regions where others have mapped normal faults.
During the last year, we have collected six gravity cores from the northern side of the Santa Bar... more During the last year, we have collected six gravity cores from the northern side of the Santa Barbara Basin for paleomagnetic deformation tests. The first two cores were collected on the smaller Gaviota Slide on the western side of the basin. These cores provide the slump end member, since one core comes from the evacuated zone while the other comes from the toe or accumulation zone. Two additional cores were collected on the toes of the much older Goleta Slides and were designed to provide an undeformed reference fabric; it was our hope that they would be mostly pelagic drape but also penetrate into the top of the deformed material. One core appears to be an excellent reference core with clear laminations, while the other has distorted laminations that show the sediment has undergone some type of deformation. In between the two slides, we collected two cores on either side of the crack that runs between the two slides to investigate creep and slope stability. All cores have been sampled at a 3 cm interval with 8cc cubes to measure anisotropy of magnetic susceptibility (AMS) and AF demagnetiziation. The Gaviota slide sediments show a dominantly triaxial fabric with some alignment of the maximum eigen values, while the drape materials from the Goleta Slide show a typical oblate undeformed fabric. There are hints of deformation at major clay layers, which we continue to investigate. Several of these cores appear to show a biogentic component to the AMS signal that fades with depth. This component has a tendency to mask the deformation signal in the top sections of the cores. The NRM inclinations of the deformed core regions tend to be shallow and erratic showing what look at first glance to be excursional features.
ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controver... more ABSTRACT The origin of the "so-called" Humboldt Slide has raised much controversy.Some researchers argue that it is a slide deposit, while others interpret thedeposit as a depositional feature mantling an old slide scar formed bydown-slope gravity flows. We recently adapted the standard paleomagnetic toolof Anisotropy of Magnetic Susceptibility (AMS) in order to detect minorpost-depositional deformation (i.e., "crypto-slumps") in sedimentarysuccessions and applied it to the Humboldt Slide controversy. Crypto-slumps are slumps that are not easily observed in outcrop or coresamples. Undeformed sediments show a typical oblate fabric while even slightlydeformed sediments develop a triaxial fabric. In the winter of 2001, weacquired 5 large diameter piston cores from the Humboldt Slide, NorthernCalifornia based on a previous chirp seismic survey collected as part of theSTRATAFORM project. The cores were acquired in two groups with the first beinglocated in the center of the Humboldt Slide covering the upslope and downslopelimb of one of the structures with one core located between the twostructures. The second group of cores is located upslope near the top of theso-called Humboldt complex. Both groups are located in the extensional regimeif this deposit is indeed a slump in an area morphologically described as theridges and swales by Gardner et al. (1999). We measured the AMS on a total of293 samples down-core and from these analyses we found that fabric wasdominantly oblate except in regions that had experienced flow-in from thepiston coring process. Based on these results, we conclude that the HumboldtSlide is not a slide. The ridges and swales appear to have grown as sedimentwaves on an old slide scar. We have corroborated this model with furtheranalysis of our chirp seismics which show thickening on the upslope side ofthese structures and continuous reflectors across regions where others havemapped normal faults. Gardner, J.V., Prior, D.B., Field, M.E., 1999, Humboldt Slide - a largeshear-dominated retrogressive slope failure, Marine Geology, v. 154, 323-338.
With the successful landing of the Phoenix Mars Lander comes the task of visualizing the spacecra... more With the successful landing of the Phoenix Mars Lander comes the task of visualizing the spacecraft, its operations and surrounding environment. The JPL Solar System Visualization team has brought together a wide range of talents and software to provide a suit of ...
NOAA's Nation... more NOAA's National Geophysical Data Center (NGDC) provides the deep archive of US multibeam sonar hydrographic surveys. NOAA stores the data as Bathymetric Attributed Grids (BAG; http://www.opennavsurf.org/) that are HDF5 formatted files containing gridded bathymetry, gridded uncertainty, and XML metadata. While NGDC provides the deep store and a basic ERSI ArcIMS interface to the data, additional tools need to be created
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