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| Value | Definition |
|---|---|
| failed slope | Areas of the sea floor on the continental slope that have an extensive but subtle network of scarps revealed in the multibeam bathymetry. Most of the scarps, which are attributed to mass wasting, are 20-75 m high. High-resolution seismic profiles show that the scarps truncate reflectors that underlie the stable parts of the slope to either side of the failed areas. The sea floor below the scarps is rough and commonly interrupted by additional scarps. |
| hemipelagic | Hemipelagic deposit. Areas of the sea floor away from submarine canyons, primarily on the continental rise, identified by a smooth sea floor with low backscatter intensity, and where subbottom profiles show closely-spaced reflections that parallel the sea floor. On the continental slope, hemipelagic sediment occupies the inter-canyon sections of the upper slope and covers less of the lower part of the slope. |
| mtd | Mass-transport deposits (mtd) in an area southwest of Hudson Canyon are identified by long narrow 'fingers' of high backscatter intensity material that originate near the base of the slope and extend downslope as much as 120 km to the south in shallow depressions. Mass-transport deposits northeast of Hudson Canyon are identified by areas of moderate to high backscatter intensity that begin at the base of the continental slope and cover most of the upper rise. High-resolution seismic profiles show that this area is characterized by seismically transparent layers and a rough surface. |
| mtd_buried | seaward portions of two fingers of mass-transport deposits (mtd) on the continental rise southwest of Hudson Canyon covered by sediment waves. |
| eroded strata | Areas of the sea floor along the canyon axis that appear nearly flat in the shaded relief image and floored with material showing high backscatter intensity, and areas on the canyon walls with an intricate network of gullies that indicate slope failure. |
| sediment waves | A field of sediment waves lies on the upper continental rise on the southwest side of Hudson Canyon, and is shown most clearly on the image of backscatter intensity. The waves begin about 25 km seaward from the base of the continental slope and extend southward about 80 km across the upper rise. The sediment waves abut the rim of Hudson Canyon for approximately 50 km. These waves have crests oriented roughly east-west and wavelengths of 900-1,500 m. |
| Value | Definition |
|---|---|
| slope | continental slope; area of the sea floor extending from about 200 m water depth offshore to 2,000-2,200 m water depth. |
| rise | continental rise; area of the sea floor extending from about 2,000 meters water depth offshore to beyond the southeastern edge of the survey area. |
| Range of values | |
|---|---|
| Minimum: | 5800 |
| Maximum: | 4432800000 |
| Units: | square meters |
This shapefile shows sea-floor environments (failed slope, mass-transport deposits, buried mass-transport deposits, sediment waves, eroded strata, and hemipelagic sediments) in the Hudson Canyon region based on backscatter intensity, physiography, and sub-bottom characteristics.
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Are there legal restrictions on access or use of the data?Access_Constraints: none
Use_Constraints: none
Neither the U.S. Government, the Department of the Interior, nor the U.S. Geological Survey, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
| Data format: | Shapefile showing sea-floor environments of the Hudson Canyon region and associated metadata derived from a 2002 multibeam survey of the Hudson Canyon and adjacent slope and rise compressed in a zip file. in format shapefile (version ArcGIS 10.3.1) Esri shapefile Size: 0.1 |
|---|---|
| Network links: |
https://www.sciencebase.gov/catalog/file/get/58fa5eade4b0b7ea5452564d https://www.sciencebase.gov/catalog/item/58fa5eade4b0b7ea5452564d https://doi.org/10.5066/F77H1GSF |
| Data format: | Shapefile showing sea-floor environments of the Hudson Canyon region derived from a 2002 multibeam survey of the Hudson Canyon and adjacent slope and rise with the data provided through a WMS (web mapping service). in format WMS (version 1.3.0) |
|---|---|
| Network links: |
https://www.sciencebase.gov/catalogMaps/mapping/ows/58fa5eade4b0b7ea5452564d?service=wms&request=getcapabilities&version=1.3.0 https://www.sciencebase.gov/catalog/item/58fa5eade4b0b7ea5452564d |
| Data format: | Shapefile showing sea-floor environments of the Hudson Canyon region derived from a 2002 multibeam survey of the Hudson Canyon and adjacent slope and rise with the data provided through a WFS (web feature service). in format WFS (version 1.0.0) |
|---|---|
| Network links: |
https://www.sciencebase.gov/catalogMaps/mapping/ows/58fa5eade4b0b7ea5452564d?service=wfs&request=getcapabilities&version=1.0.0 https://www.sciencebase.gov/catalog/item/58fa5eade4b0b7ea5452564d |
The shapefile of facies is compressed into a zip file (hc_facies.zip). To use these data, the user must have software capable of uncompressing the zip file and ArcGIS or another GIS application package capable of viewing the data.
