Filters: Tags: Substrate (X) > Types: Map Service (X)

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Characterization of seafloor photographs near the mouth of the Elwha River during the first two years of dam removal (2011-2013) We characterized seafloor sediment conditions near the mouth of the Elwha River from underwater photographs taken every four hours from September 2011 to December 2013. A digital camera was affixed to a tripod that was deployed in approximately 10 meters of water (Tripod location from September 2011 to April 2013: 48.15333, -123.55931; tripod location from April 2013 to December 2013: 48.15407, -123.55444). Each photograph was qualitatively characterized as one of six categories: (1) base, or no sediment; (2) low sediment; (3) medium sediment; (4) high sediment; (5) turbid; or (6) kelp. For base conditions, no sediment was present on the seafloor. Low sediment conditions were characterized by a light dusting of... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, Olympic Peninsula, Remote Sensing, State of Washington, All tags... Strait of Juan de Fuca, dam removal, oceans, photography, sediment, sedimentation, sedimentation, substrate, time series datasets, underwater photography, Fewer tags Seafloor character, 2-m-resolution grid--Offshore of Monterey, California This part of DS 781 presents data for the seafloor-character map of the Offshore of Monterey map area, California. Seafloor-character data are provided as two separate grids depending on resolution of the mapping system and processing method. The raster data file is included in "SeafloorCharacter_2m_OffshoreMonterey.zip," which is accessible from https://doi.org/10.5066/F70Z71C8. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Hartwell, S.R., Cochrane, G.R., Golden, N.E., Watt, J.T., Davenport, C.W., Kvitek, R.G., Erdey, M.D., Krigsman, L.M., Sliter, R.W., and Maier, K.L. (S.Y. Johnson and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Monterey, California:... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Backscatter, Bathymetry, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, All tags... Continental/Island Shelf, Ecosystem, Fisheries, Geology, Intensity, Marina, Marine Nearshore Subtidal, Marine Offshore Subtidal, Monterey, Monterey County, Multibeam, Northern California Ecoregion, Ocean Floor Topography, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Seafloor Character, Seafloor Topography, Seaside, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:7188e403-5a46-434e-8367-1a9af5782448, Unconsolidated Mineral Substrate, distributions, environment, geoscientificInformation, imageryBaseMapsEarthCover, oceans, sea-floor characteristics, substrate, Fewer tags Surface-sediment grain-size distributions from the Elwha River delta, Washington, July 2015 This portion of the USGS data release presents sediment grain-size data from on the Elwha River delta, Washington in July and August, 2015 (USGS Field Activities 2015-648-FA and 2015-652-FA). Bed sediment was sampled using a small ponar, or 'grab', sampler on July 28, 2016 from the R/V Frontier at a total of 70 locations in water depths between approximately 1 and 17 m around the delta. An additional 17 samples were obtained by SCUBA divers between July 22 and August 23, 2015 using a 15 cm diameter push corer inserted into the seabed as far as possible to a maximum depth of 15 cm. Forty-eight samples were collected at low tide at intertidal locations on the delta. The locations of grab samples and intertidal samples... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, GPS (Global Positioning System), Global Positioning System (GPS) observations, Olympic Peninsula, All tags... Strait of Juan de Fuca, Substrate, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags Core descriptions and sand bed thickness data from Kahana Valley, O'ahu, Hawai'i This portion of the data release contains information on cores that were collected by the U.S. Geological Survey in Kahana Valley, O'ahu, Hawaii in 2015 and 2017. Sites were cored in order to describe wetland stratigraphy and to identify potential tsunami deposits. These cores contain mud, peat, fluvial sands, and marine carbonate sands, reflecting deposition in a variety of coastal environments. PDF files describe twenty-four (24) gouge and ‘Russian’ cores (hand held, side-filling peat augers) that were collected and described in the field. Cores collected in 2017 were described using the Troels-Smith sediment classification scheme (Troels-Smith, 1955; Nelson, 2015). Another pdf file (Kahana_cores_legend.pdf) contains... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Hawaiian Islands, Kahana Valley, Nonliving resources, All tags... O'ahu, PCMSC, Pacific Coastal and Marine Science Center, Physical Habitats and Geomorphology, Physical/Chemical Features, State of Hawai'i, Substrate, U.S. Geological Survey, USGS, core analysis, geoscientificInformation, sediment, tsunamis, Fewer tags Vibracore photographs, computed tomography scans, and core-log descriptions from Pololu Valley, Island of Hawaii This portion of the data release contains information on vibracores that were collected by the U.S. Geological Survey in Pololu Valley, Island of Hawai'i in 2014. Five sites were cored in order to describe wetland stratigraphy and to identify potential tsunami deposits. These vibracores contain mud, peat, fluvial sands, and marine volcanic sands, reflecting deposition in a variety of coastal environments. Two (2) pdf files (VC1.pdf, VC2.pdf) describe vibracores that were split, imaged by a line-scanner camera, scanned to generate computed tomagraphic (CT) images, and visually described. A detailed description of the upper 150 cm of VC1 using the Troels-Smith sediment classification scheme (Troels-Smith, 1955; Nelson,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Hawaiian Islands, Island of Hawai'i, Nonliving resources, All tags... PCMSC, Pacific Coastal and Marine Science Center, Physical Habitats and Geomorphology, Physical/Chemical Features, Pololu Valley, State of Hawai'i, Substrate, U.S. Geological Survey, USGS, core analysis, geoscientificInformation, sediment, tsunamis, Fewer tags Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay The urbanized area of downtown Menlo Park is subject to persistent flooding and sediment deposition by San Francisquito Creek in South San Francisco Bay. To mitigate these events, a suite of cores was collected in 2002 at the mouth of the creek to determine sediment depositional rates on the delta. One of those cores (721-1) was selected for microbiological (pollen, diatoms, and foraminifera) and geochemical analyses to reconstruct a depositional record over the past two millennia. This data release provides radiocarbon dates, census counts of benthic foraminifera, diatoms, and palynomorphs, and the measurement of anthropogenic metals and other elements in sediments from this core. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Habitat, Hooks Point, Invertebrates, All tags... PCMSC, Pacific Coastal and Marine Science Center, San Francisco Bay, San Francisquito Creek, Substrate, U.S. Geological Survey (USGS), USGS, animals, bay, benthic foraminifera, biota, carbon-14 analysis, chemical analysis, diatoms, environment, foraminifera, geochemistry, geoscientificInformation, gravity coring, marine chemistry, mass spectroscopy, mercury analysis, none, organisms, palynology, protists, radiometric dating, sediment deposition, sediment geochemistry, sediment-pollutant interaction, society, Fewer tags MGL1109backutm.tif: Multibeam backscatter data collected by the U.S. Geological Survey in the Gulf of Alaska in 2011 during cruise MGL1109, 100-meter gridded data in GeoTIFF format, UTM 6 coordinates This raster dataset represents approximately 69,060 square kilometers of Simrad EM122 multibeam-backscatter data collected in the Gulf of Alaska during U.S. Geological Survey (USGS) cruise MGL1109 aboard the R/V Marcus G. Langseth. The data have been reduced for position, elevation, orientation, water-column sound-speed, and refraction effects. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Aleutian Basin, Aleutian Trench, Baranof Fan, Bering Sea, Bowers Ridge, All tags... Bowie Seamount, CMHRP, Coastal and Marine Hazards and Resources Program, Dutch Harbor, Extended Continental Shelf, Gulf of Alaska, Kodiak Island, Kodiak Seamount, PCMSC, Pacific Coastal and Marine Science Center, Physical Habitats and Geomorphology, Shirshov Ridge, Substrate, Surveyor Fan, U.S. Geological Survey, USGS, Umnak Plateau, backscatter intensity, continental shelf, environment, geoscientificInformation, geospatial datasets, image mosaics, marine geophysics, marine geophysics, multibeam echo sounder, multibeam sonar, oceans, sea-floor acoustic reflectivity, sea-floor characteristics, Fewer tags Interpretation of the seabed geologic substrates in quadrangle 5 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts based on data collected by the U.S. Geological Survey from 1993-2019 The U.S. Geological Survey (USGS), in cooperation with the National Marine Sanctuary Program of the National Oceanic and Atmospheric Administration (NOAA), has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993. The interpretive datasets and source information presented here are for quadrangle 5, which is one of 18 similarly sized segments of the 3,700 square kilometer (km2) SBNMS region. The seabed of the SBNMS region is a glaciated terrain that is topographically and texturally diverse. Quadrangle 5 includes the shallow, rippled, coarse-grained sandy crest and upper eastern and western flanks of southern Stellwagen Bank, its fine-grained sandy... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Atlantic Ocean, Boston, Massachusetts, CMGP, Coastal and Marine Geology Program, Esri shapefile, All tags... Massachusetts, Massachusetts Bay, NOAA, National Oceanic and Atmospheric Administration, North America, Stellwagen Bank, Stellwagen Bank National Marine Sanctuary, U.S. Geological Survey, U.S. east coast, USGS, United States, WHCMSC, Woods Hole Coastal and Marine Science Center, environment, geologic substrates, geology, geoscientificInformation, geospatial datasets, interpretation, marine geology, oceans, polygon, quadrangle 5, scientific interpretation, sea-floor characteristics, seabed geology, sediment mobility, substrate, substrate distribution, substrate grain size, substrate mobility, substrate mud content, Fewer tags Surface-sediment grain-size distributions of the Elwha River delta, Washington, July 2017 This portion of the USGS data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, in July 2017 (USGS Field Activity Number 2017-638-FA). Surface sediment was collected on July 20, 2017 at a total of 80 locations using a small ponar, or 'grab', sampler from the R/V Frontier in water depths between about 1 and 17 m around the delta. An additional 31 samples were collected by hand at low tide. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. Grab samples that yielded less than 50 g of sediment were omitted from analysis. The grain-size distributions of samples that yielded more than 50 g of sediment... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CMHRP, Clallam County, Coastal and Marine Hazards and Resources Program, Elwha River, GPS (Global Positioning System), All tags... Global Positioning System (GPS) observations, Olympic Peninsula, PCMSC, Pacific Coastal and Marine Science Center, Strait of Juan de Fuca, Substrate, U.S. Geological Survey, USGS, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags Surface-sediment grain-size distributions of the Elwha River delta, Washington, July 2016 This portion of the USGS data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, in July 2016 (USGS Field Activity Number 2016-653-FA). Surface sediment was collected on July 20, 2016 at a total of 67 locations using a small ponar, or 'grab', sampler from the R/V Frontier in water depths between about 1 and 17 m around the delta. An additional 38 samples were collected by hand at low tide. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. Grab samples that yielded less than 50 g of sediment were omitted from analysis and are classified as "no sample". The grain-size distributions of samples that... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, GPS (Global Positioning System), Global Positioning System (GPS) observations, Olympic Peninsula, All tags... Strait of Juan de Fuca, Substrate, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags Seafloor character--Offshore Scott Creek, California This part of DS 781 presents the seafloor-character map of the Offshore of Scott Creek map area, California. The raster data file is included in "SeafloorCharacter_OffshoreScottCreek.zip," which is accessible from https://doi.org/10.5066/F7CJ8BJW. These data accompany the pamphlet and map sheets of Cochrane, G.R., Dartnell, P., Johnson, S.Y., Greene, H.G., Erdey, M.D., Dieter, B.E., Golden, N.E., Endris, C.A., Hartwell, S.R., Kvitek, R.G., Davenport, C.W., Watt, J.T., Krigsman, L.M., Ritchie, A.C., Sliter, R.W., Finlayson, D.P., and Maier, K.L. (G.R. Cochrane and S.A. Cochran, eds.), 2015, California State Waters Map Series--Offshore of Scott Creek, California: U.S. Geological Survey Open-File Report 2015-1191,... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Acoustic Reflectivity, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, All tags... Fisheries, Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz County, Scott Creek, Seafloor Character, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:556621b0e4b0d9246a9ec15f, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, distributions, ecosystems, environment, geoscientificInformation, geospatial datasets, image mosaics, imageryBaseMapsEarthCover, interferometric sonar, maps and atlases, marine geophysics, multibeam echo sounder, oceans, photographic sampling, physical habitats and geomorphology, sea-floor acoustic reflectivity, sea-floor characteristics, seabed, sonar methods, substrate, underwater photography, video observation, videos, Fewer tags Seafloor character--Offshore Pigeon Point, California This part of DS 781 presents the seafloor-character map Offshore of Pigeon Point, California. The raster data file is included in "SeafloorCharacter_OffshorePigeonPoint.zip," which is accessible from https://doi.org/10.5066/F7513W80. These data accompany the pamphlet and map sheets of Cochrane, G.R., Watt, J.T., Dartnell, P., Greene, H.G., Erdey, M.D., Dieter, B.E., Golden, N.E., Johnson, S.Y., Endris, C.A., Hartwell, S.R., Kvitek, R.G., Davenport, C.W., Krigsman, L.M., Ritchie, A.C., Sliter, R.W., Finlayson, D.P., and Maier, K.L. (G.R. Cochrane and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Pigeon Point, California: U.S. Geological Survey Open-File Report 2015–1232, pamphlet 40 p.,... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Acoustic Reflectivity, Ano Nuevo State Park, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, All tags... Continental/Island Shelf, Fisheries, Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Pigeon Point, Rock Substrate, San Mateo County, Seafloor Character, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, Unconsolidated Mineral Substrate, bathymetry, bathymetry and elevation, bathymetry measurement, distributions, ecosystems, environment, geoscientificInformation, geospatial datasets, image mosaics, imageryBaseMapsEarthCover, interferometric sonar, maps and atlases, marine geophysics, multibeam echo sounder, oceans, photographic sampling, physical habitats and geomorphology, sea-floor acoustic reflectivity, sea-floor characteristics, seabed, sonar methods, substrate, underwater photography, video observation, videos, Fewer tags Seafloor character, 5-m-resolution grid--Offshore of Monterey, California This part of DS 781 presents data for the seafloor-character map of the Offshore of Monterey map area, California. Seafloor-character data are provided as two separate grids depending on resolution of the mapping system and processing method. The raster data file is included in "SeafloorCharacter_5m_OffshoreMonterey.zip," which is accessible from https://doi.org/10.5066/F70Z71C8. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Hartwell, S.R., Cochrane, G.R., Golden, N.E., Watt, J.T., Davenport, C.W., Kvitek, R.G., Erdey, M.D., Krigsman, L.M., Sliter, R.W., and Maier, K.L. (S.Y. Johnson and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Monterey, California:... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Backscatter, Bathymetry, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, All tags... Continental/Island Shelf, Ecosystem, Fisheries, Geology, Intensity, Marina, Marine Nearshore Subtidal, Marine Offshore Subtidal, Monterey, Monterey County, Multibeam, Northern California Ecoregion, Ocean Floor Topography, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Seafloor Character, Seafloor Topography, Seaside, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:34c97a27-7bc0-47e4-8f1b-055c3f975ff4, Unconsolidated Mineral Substrate, distributions, environment, geoscientificInformation, imageryBaseMapsEarthCover, oceans, sea-floor characteristics, substrate, Fewer tags Surface-sediment grain-size distributions from the Elwha River delta, Washington, September 2013 This portion of the USGS data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, in September 2013 (USGS Field Activity Number W-07-13-PS). Surface sediment was sampled using a small ponar, or 'grab', sampler on September 19, 2013 from the R/V Frontier at a total of 62 locations in water depths between about 1 and 12 m around the delta. An additional 21 sediment samples were collected between September 16 and September 19, 2013 at low tide from intertidal locations on the delta. A handheld GNSS receiver was used to determine the locations of sediment samples. The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, GPS (Global Positioning System), Global Positioning System (GPS) observations, Olympic Peninsula, All tags... Strait of Juan de Fuca, Substrate, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags MGL1111backsutm.tif: Multibeam backscatter data collected by the U.S. Geological Survey in the Bering Sea in 2011 during cruise MGL1111, 100-meter gridded data in GeoTIFF format, UTM zone 60 coordinates This raster dataset represents approximately 49,581 square kilometers of Simrad EM122 multibeam backscatter-intensity data collected in the Bering Sea during U.S. Geological Survey (USGS) cruise MGL1111 aboard the R/V Marcus G. Langseth. Calibrated backscatter-intensity time-series data were adjusted for range-angle, beam pattern, and power-gain distortions. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Dutch Harbor, PCMSC, Pacific Coastal and Marine Science Center, All tags... Physical Habitats and Geomorphology, Substrate, U.S. Geological Survey, USGS, backscatter intensity, continental shelf, environment, geoscientificInformation, geospatial datasets, image mosaics, marine geophysics, marine geophysics, multibeam echo sounder, multibeam sonar, oceans, sea-floor acoustic reflectivity, sea-floor characteristics, seismic methods, Fewer tags Surface-sediment grain-size distributions of the Elwha River delta, Washington, January 2015 This portion of the USGS data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, in January 2015 (USGS Field Activity Number 2015-605-FA). Surface sediment was collected on January 28, 2015, at a total of 61 locations using a small ponar, or 'grab', sampler from the R/V Frontier in water depths between about 1 and 17 m around the delta. A hand-held global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was sub-sampled and 10 mL of 35 percent hydrogen peroxide... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, GPS (Global Positioning System), Global Positioning System (GPS) observations, Olympic Peninsula, All tags... Strait of Juan de Fuca, Substrate, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags Substrate Mobility, Northeast Substrate mobility measures the realized mobility of the physical substrate, due to both substrate composition (i.e. sand) and exposure to forces (wind and water) that transport material. This is an important attribute of certain dynamic systems (e.g., coastal dune systems) and is given as an index of mobility (1=stable , 10=highly mobile, values 6, 7, 8, and 10 do not occur in the Northeast region). Substrate mobility was derived from a custom algorithm based on the ESMplus and National Land Cover Database (NLCD) classes and National Wetlands Inventory (NWI) polygons. Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: DSL, Data, LCC Network Science Catalog, North Atlantic Landscape Conservation Cooperative Data.gov, Substrate, All tags... Substrate, UMass, completed, environment, environment, substrate mobility, substrate mobility, Fewer tags Multichannel minisparker seismic-reflection data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018 High-resolution multichannel minisparker seismic-reflection data were collected by the U.S. Geological Survey in July of 2018 between Point Conception and Coal Oil Point in the Santa Barbara Channel, California. Data were collected aboard the USGS R/V Parke Snavely during field activity 2018-645-FA, using SIG 2-mille minisparker and recorded using an 8-channel Geometrics digital hydrophone streamer. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location. Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CMHRP, Channel Islands, City of Goleta, City of Santa Barbara, Coal Oil Point, All tags... Coastal and Marine Hazards and Resources Program, Distributions, Gaviota, Isla Vista, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Point Conception, Santa Barbara Basin, Santa Barbara Channel, State of California, Substrate, U.S. Geological Survey, USGS, acoustic methods, geophysics, geoscientificinformation, geospatial datasets, mapping, marine geophysics, oceans, seabed, seismic reflection profiling, sub-bottom profiling, Fewer tags Surface-sediment grain-size distributions from the Elwha River delta, Washington, September 2014 This portion of the USGS data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, in September 2014 (USGS Field Activity Number 2014-649-FA). Surface sediment was collected on September 5, 2014, at a total of 63 locations using a small ponar, or 'grab', sampler from the R/V Frontier in water depths between approximately 1 and 17 m around the delta. A hand-held global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was sub-sampled and 10 mL of 35 percent hydrogen... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clallam County, Elwha River, GPS (Global Positioning System), Global Positioning System (GPS) observations, Olympic Peninsula, All tags... Strait of Juan de Fuca, Substrate, grain-size analysis, ocean processes, oceans, sediment, sediment transport, sedimentation, Fewer tags Seafloor character--Offshore Santa Cruz, California This part of DS 781 presents the seafloor-character map Offshore of Santa Cruz, California. The raster data file is included in "SeafloorCharacter_OffshoreSantaCruz.zip," which is accessible from https://doi.org/10.5066/F7TM785G. These data accompany the pamphlet and map sheets of Cochrane, G.R., Dartnell, P., Johnson, S.Y., Erdey, M.D., Golden, N.E., Greene, H.G., Dieter, B.E., Hartwell, S.R., Ritchie, A.C., Finlayson, D.P., Endris, C.A., Watt, J.T., Davenport, C.W., Sliter, R.W., Maier, K.L., and Krigsman, L.M. (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Santa Cruz, California: U.S. Geological Survey Open-File Report 2016-1024, pamphlet 40 p., 10 sheets, scale 1:24,000,... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Acoustic Reflectivity, Bathymetry, CMHRP, Coastal and Marine Hazards and Resources Program, Continental/Island Shelf, All tags... Fisheries, Marine Nearshore Subtidal, Marine Offshore Subtidal, Northern California Ecoregion, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Rock Substrate, Santa Cruz, Santa Cruz County, Seafloor Character, Seafloor Topography, State of California, Transform Continental Margin, U.S. Geological Survey, USGS, USGS:5568a758e4b0d9246a9f627f, Unconsolidated Mineral Substrate, bathymetry, bathymetry measurement, distributions, ecosystems, environment, geoscientificInformation, geospatial datasets, image mosaics, imageryBaseMapsEarthCover, interferometric sonar, maps and atlases, marine geophysics, multibeam echo sounder, oceans, photographic sampling, sea-floor acoustic reflectivity, sea-floor characteristics, seabed, sonar methods, substrate, underwater photography, video observation, videos, Fewer tags 1 2 »