David C. Twichell 2017 1.0 vector digital data data release DOI:10.5066/F77H1GSF Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts U.S. Geological survey, Coastal and Marine Geology Program https://doi.org/10.5066/F77H1GSF https://www.sciencebase.gov/catalog/item/58fa5ed2e4b0b7ea54525658 Bradford Butman William W. Danforth David C. Twichell Peter A. Rona 2017 1.0 data release DOI:DOINumber Reston, VA U.S. Geological Survey Suggested citation: Butman, Bradford, Danforth, W.W., Twichell, D.C., and Rona, P.A., 2017, Bathymetry, backscatter intensity, and geomorphology of the sea floor of the Hudson Canyon and adjacent slope and rise: U.S. Geological Survey data release, https://doi.org/10.5066/F77H1GSF. https://doi.org/10.5066/F77H1GSF The Hudson Canyon begins on the outer continental shelf off the east coast of the United States at about 100-meters (m) water depth and extends offshore southeastward across the continental slope and rise. A multibeam survey was carried out in 2002 to map the bathymetry and backscatter intensity of the sea floor of the Hudson Canyon and adjacent slope and rise. The survey covered an area approximately 205 kilometers (km) in the offshore direction, extending from about 500 m to about 4,000 m water depth, and about 110 km in the alongshore direction, centered on the Hudson Canyon. The sea floor was mapped using a SeaBeam Instruments 2112 multibeam echosounder aboard the National Oceanic and Atmospheric Administration (NOAA) ship Ronald H. Brown. Maps derived from the multibeam observations show sea-floor bathymetry and backscatter intensity (a measure of sea floor texture and roughness), geomorphic provinces, and sea-floor environments (Butman and others, 2006). The sea floor was mapped by the U.S. Geological Survey in cooperation with Rutgers University and with support from NOAA. This shapefile shows an interpretation of geomorphic provinces (slope, base of slope depressions, canyon floor, canyon floor filled, canyon wall, upper rise, lower rise, rise valley) in the Hudson Canyon region based on multibeam bathymetry collected in 2002. Maps and interpretations of the multibeam echosounder data from the 2002 multibeam survey of the sea floor of the Hudson Canyon region are published in Butman and others (2006) (see cross reference). This publication includes the previously unpublished digital multibeam data and interpretations with FGDC-compliant metadata (CSDGM format). The data were collected on Woods Hole Coastal and Marine Science Center field activity 2002-050-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-050-FA). Other datasets from the 2002 survey may be found in Butman and others (2017) (see larger work citation). Andrews and others (2013) (see cross reference) present a bathymetric terrain model for the Atlantic margin which includes the Hudson Canyon region. 2006 publication date of original release of maps (with no digital data) Complete None planned -72.521137 -70.082809 39.846464 37.615125 USGS Metadata Identifier USGS:58fa5ed2e4b0b7ea54525658 none morphology polyline shapefile base of slope canyon floor canyon floor - filled canyon wall upper rise lower rise rise valley sea floor sea floor mapping multibeam SeaBeam Instruments 2112 multibeam NOAA ship Ronald H. Brown WHCMSC field activity 2002-050-FA National Oceanic and Atmospheric Administration (NOAA) Woods Hole Coastal and Marine Science Center (WHCMSC) Coastal and Marine Geology Program (CMGP) U.S. Geological Survey (USGS) Rutgers Institute of Coastal and Marine Sciences USGS Open-File Report 2004-1441 interpretation ISO 19115 Topic Category oceans geoscientificInformation USGS Thesaurus sea-floor characteristics marine geology ocean sciences none Hudson Canyon New York Bight Middle Atlantic Bight North Atlantic Ocean none sea floor seafloor none 2002 none none U.S. Geological Survey David C. Twichell mailing and physical address

Woods Hole Coastal and Marine Science Center

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 dtwichell@usgs.gov https://www.sciencebase.gov/catalog/file/get/58fa5ed2e4b0b7ea54525658?name=hc_morph_browsegraphic.jpg Browse graphic of geomorphic provinces in the Hudson Canyon region. JPEG Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095 Butman, Bradford Twichell, D.C. Rona, P.A. Tucholke, B.E. Middleton, T.J. Robb, J.R. 2006 Open-File Report 2004-1441 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2004/1441/ Butman, Bradford Middleton, T.J. Thieler, E.R. Schwab, W.C. 2003 Open-File Report 03-372 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2003/of03-372/ Andrews, B.D. Chaytor, J.D. ten Brink, U.S. Brothers, D.S. Gardner, J.V. 2013 Open-File Report 2012-1266 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2012/1266/ EEZ-Scan Scientific Staff 1991 Miscellaneous Investigation Series I-2054 Reston, VA U.S. Geological Survey https://pubs.er.usgs.gov/publication/i2054/ Butman, Bradford Danforth, W.W. Clarke, J.E.H. Signell, R.P. 2017 1.0 data release DOI:10.5066/F7C53J1Z Reston, VA U.S. Geological Survey https://doi.org/10.5066/F7C53J1Z Geomorphic features (slope, base of slope depressions, canyon floor, canyon floor fill, canyon wall, upper rise, lower rise, rise valley) in the Hudson Canyon region were identified based on multibeam data from Woods Hole Coastal and Marine Science Center field activity 2002-050-FA. Data gaps and overlaps were identified and corrected. Geomorphic features (slope, base of slope depressions, canyon floor, canyon floor fill, canyon wall, upper rise, lower rise, rise valley) in the Hudson Canyon region were identified based on multibeam data from Woods Hole Coastal and Marine Science Center field activity 2002-050-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-050-FA). Accuracy of hand-drawn interpreted layer estimated to be several pixels (200 - 600 m) depending on water depth). Morphology is interpreted using multibeam and high-resolution seismic data (Butman and others, 2006; EEZ-Scan Scientific Staff, 1991). Outlines of each morphologic region were drawn by hand and converted to a shapefile. 2004 U.S. Geological Survey David C. Twichell mailing and physical address

Woods Hole Coastal and Marine Science Center

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2266 dtwichell@usgs.gov Data gaps and overlaps between the hand-drawn polygons were removed using the following steps: 1) Shapefile was imported to a Feature Dataset (UTM 18) within a file geodatabase to build topology. (ArcMap v. 10.3.1) 2) Topology was created for each of the two feature classes (now in the Feature Dataset), with the topology rules "Must not overlap" and "Must not have gaps". Topology was then built and validated to identify those locations. 3) The topology and features were edited to remove/repair these topology errors. 4) Feature classes, were exported from the feature dataset back to shapefile using the geographic coordinate system. 2016 U.S. Geological Survey Brian D. Andrews mailing and physical address

Woods Hole Coastal and Marine Science Center

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2348 bandrews@usgs.gov Added keywords section with USGS persistent identifier as theme keyword (20200807). Removed the web services distribution formats in preparation for ScienceBase moving platforms and those services will no longer be available (20260413). 20260413 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Vector G-polygon 51 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 hc_morph Geomorphic provinces of the Hudson Canyon and adjacent slope and rise region USGS FID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Coordinates defining the features. Interp2 Interpretation of geomorphic provinces of the Hudson Canyon region based on multibeam bathymetry. USGS slope The continental slope occupies the northwest portion of the study area and extends from the shoreward limit of the survey to water depths of 2,000-2,200 m. Areas that are not incised by submarine canyons exhibit slopes that range from 1.8-3 degrees in water depths shallower than 1,300 m and from 2.5-5 degrees in water depths deeper than 1,300 m. USGS base of slope depressions At the base of the continental slope there are a series of narrow, linear depressions. They are discontinuous, trend parallel to the base of the slope, are 0.5-2 km wide and 3-13 km long, and are as much as 23 m deeper than the surrounding sea floor. USGS canyon floor Canyon floors are the relatively flat axial valleys of submarine canyons. Most canyon floors have a comparatively high backscatter intensity on the backscatter image. USGS canyon floor-filled Shallow valleys located to the northeast of Hudson Canyon that can be traced from the mouths of the canyons at the base on the slope onto the upper rise where they coalesce into one valley that feeds into Hudson Canyon. These shallow valleys and two others on the northeastern side of Hudson Canyon are partially filled with mass-transport deposits. USGS canyon wall Canyon walls flank the axial valleys of submarine canyons. Where canyons transect the continental slope the average slope of the walls is about 8 degrees, the walls are eroded, and an intricate network of gullies indicates slope failure. USGS upper rise The upper continental rise lies seaward of the base-of-slope depressions and extends offshore to water depths of 3,000 – 3,100 m. The slope of the upper rise away from submarine canyons ranges from 0.2-0.9 degrees. USGS lower rise The lower continental rise extends from water depths of 3,000-3,100 m to beyond the southeastern edge of the study area. The slope of the lower rise ranges from 0.5-1.2 degrees and, on average, has a slightly greater slope than the upper rise. USGS rise valley Several linear valleys with bowl-like heads originate on the lower rise in water depths between 3,000 and 3,200 m water depth. The rise valleys are shallow, straight features with bowl-like heads that are 6-69 m deeper than the surrounding sea floor. USGS This shapefile shows the geomorphic provinces (geomorphology) of the Hudson Canyon and adjacent slope and rise, interpreted using the multibeam bathymetry and backscatter intensity data, and selected high resolution seismic profiles. The morphologic units are: slope, base of slope depressions, canyon floor, canyon floor-filled, canyon wall, upper rise, lower rise, and rise valley. See Butman and others (2006) for description (cross reference). U.S. Geological Survey U.S. Geological Survey - ScienceBase mailing and physical address

Denver Federal Center

Building 810

Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov This dataset contains hc_morph.shp as well as the other shapefile components, and FGDC-compliant metadata (CSDGM format). 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. shapefile ArcGIS 10.3.1 Esri shapefile Shapefile showing morphology of the Hudson Canyon region and associated metadata from a 2002 survey of the Hudson Canyon compressed in a zip file. zip 0.1 https://www.sciencebase.gov/catalog/file/get/58fa5ed2e4b0b7ea54525658 https://www.sciencebase.gov/catalog/item/58fa5ed2e4b0b7ea54525658 https://doi.org/10.5066/F77H1GSF The network resources offer the options of downloading all the files or accessing the landing page of the data. none The shapefile of morphology is compressed into a zip file (hc_morph.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. 20260413 U.S. Geological Survey Bradford Butman mailing and physical address

Woods Hole Coastal and Marine Science Center

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2212 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240319) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time