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High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2017-003-FA High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Point Sur on May 19-26, 2017, in an effort to characterize mudflow hazards on the Mississippi River Delta front. As the initial field program of a research cooperative between the U.S. Geological Survey, the Bureau of Ocean Energy Management, and other Federal and academic partners, the primary objective of this cruise was to assess the suitability of sea-floor mapping and shallow subsurface imaging tools in the challenging environmental conditions found across delta fronts (for example, variably distributed water column stratification and widespread biogenic... Tags: BOEM, Bureau of Ocean Energy Management, CMGP, Coastal and Marine Geology Program, Gulf of Mexico, All tags... Marine Geology, Mississippi River Delta front, Pass a Loutre, Remote Sensing, South Pass, Southeast Louisiana, Southwest Pass, U.S. Geological Survey, USGS, WHCMSC, Woods Hole Coastal and Marine Science Center, bathymetry, boomer, chirp, field activity number 2017-003-FA, marine geology, marine geophysics, multi-channel streamer, multibeam sonar, navigational data, ocean sciences, sea floor, sea-floor acoustic reflectivity, seismic reflection methods, sound velocity profiles, sparker, Fewer tags Multichannel Seismic-Reflection and Navigation Data Collected Using SIG ELC1200 and Applied Acoustics Delta Sparkers and Geometrics GeoEel Digital Streamers During U.S. Geological Survey Field Activity 2020-014-FA, Southwest of Puerto Rico, March 2020 In March 2020, the U.S. Geological Survey and the University of Puerto Rico Mayagüez (UPRM) Department of Marine Sciences conducted a marine seismic-reflection experiment focused on observing geophysical evidence of submarine faulting and mass wasting related to the southwestern Puerto Rico seismic sequence of 2019–20. The seismic sequence culminated with a magnitude 6.4 earthquake centered beneath Guayanilla Canyon on January 7, 2020 and caused shoreline subsidence, rockfalls, and considerable damage to buildings. The survey was conducted during March 7–13 out of the UPRM Isla Magueyes Laboratories aboard the research vessel Sultana. Approximately 226 line kilometers of multichannel seismic reflection data were... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Applied Acoustics Delta sparker, CMHRP, Caribbean Sea, Coastal and Marine Hazards and Resources Program, DOI, All tags... Department of the Interior, GeoEel, Geometrics, Geophysics, Guanica Bay, Guayanilla Bay, Guayanilla Canyon, Isla Magueyes, Isla Magueyes Laboratories, La Parguera, Marine Geology, Marine Geology, PNG, R/V Sultana, SEG-Y traces, SIG ELC1200 sparker, Stratigraphy, Stratigraphy, Structural Geology, Structural Geology, U.S. Geological Survey, UPRM, USGS, United States of America, University of Puerto Rico Mayaguez - Department of Marine Science, WHCMSC, Woods Hole Coastal and Marine Science Center, common midpoint stack, field activity number 2020-014-FA, geoscientificInformation, image, location, marine geology, marine geology, marine geophysics, marine geophysics, multi-channel streamer, navigation, navigational data, oceans, seismic navigation, seismic reflection, seismic reflection methods, shapefile, sub-bottom profiling, trackline navigation, Fewer tags Results from isotope analysis of authigenic carbonates collected offshore the U.S. Mid- and South Atlantic Geochemical analysis of carbonate rock samples collected from seep fields on the RB1903 and AT41 research expeditions in the U.S. Mid- and South Atlantic. Samples were collected as a fingerprint to past hydrocarbon seep activity, fluid source, and depositional environment. Categories: Data; Tags: Atlantic Ocean, CMHRP, Coastal and Marine Hazards and Resources Program, Habitat, PCMSC, All tags... Pacific Coastal and Marine Science Center, U.S. Geological Survey, USGS, chemical analysis, environment, gas hydrate resources, geochemistry, geochemistry, geoscientificInformation, light stable isotopic analysis, methanogens, oceans, Fewer tags Sedimentological and geotechnical analyses of marine sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA Twenty-four piston cores (and associated trigger cores) were collected from the source zone of the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon by the U.S. Geological Survey and the University of Rhode Island Department of Ocean Engineering during an eight-day cruise aboard the R/V Hugh R. Sharp in September/October of 2012. These cores were analyzed for evidence of seafloor mass transport processes, with an emphasis on constraining the age and shallow stratigraphy of the landslide complex. Sedimentological and geotechnical characterization of the cores was carried out through whole core imaging and description, followed by analysis of discrete samples at the USGS Woods Hole Coastal and... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Atlantic, Atlantic, Baltimore Canyon, CC LOI, Cruise ID HRS1209, All tags... Currituck Landslide, Currituck Landslide, Holocene, Hugh R. Sharp, Marine Geology, Maryland, North Carolina, North Carolina, Sedimentology, Stratigraphy, U.S. Continental Shelf, U.S. Geological Survey, USGSWHCMSC, Virginia, WHCMSC Field Activity 2012-007-FA, Woods Hole Coastal and Marine Science Center, clay deposits, core analysis, cores, geology, geoscientificInformation, oceans, piston cores, piston coring, sand deposits, sediment samples, sedimentology, trigger cores, unconsolidated deposits, Fewer tags Carbonate chemistry measurements of authigenic carbonates collected offshore the U.S. Mid- and South Atlantic in 2018 and 2019 as part of the DEEPSEARCH Project Geochemical analysis of carbonate rock samples collected from seep fields on the RB1903 and AT41 research expeditions in the U.S. Mid- and South Atlantic. Samples were collected as a fingerprint to past hydrocarbon seep activity, fluid source, and depositional environment. Categories: Data; Tags: Atlantic Ocean, CMHRP, Chemical analysis, Coastal and Marine Hazards and Resources Program, Geochemistry, All tags... Habitat, Marine Geology, PCMSC, Pacific Coastal and Marine Science Center, U.S. Geological Survey, USGS, carbon-14 analysis, chemical oceanography, ecosystems, environment, geoscientificInformation, oceans, radiometric dating, Fewer tags Geochemical and mineralogic analysis of authigenic carbonates collected offshore the U.S. Mid- and South Atlantic Geochemical and mineralogic analysis of selected carbonate rock samples collected from seep fields on the RB1903 and AT41 research expeditions in the U.S. Mid- and South Atlantic.Samples were collected as a fingerprint to past hydrocarbon seep activity, fluid source, and depositional environment. Analyses include: Wavelength-dispersive X-ray Fluorescence (WDXRF) major element, Inductively Coupled Optical Emission Spectroscopy/Mass Spectroscopy (ICPOES-MS) major and minor element, and x-ray diffractrometry (XRD) mineralogy. All WDXRF and ICPOES-MS samples were analyzed by the U.S. Geological Survey Minerals Resource Program Analytical Geochemistry facility via its contract laboratory, AGAT Laboratories.XRD samples... Categories: Data; Tags: Atlantic Ocean, CMHRP, Chemical analysis, Coastal and Marine Hazards and Resources Program, Habitat, All tags... PCMSC, Pacific Coastal and Marine Science Center, U.S. Geological Survey, USGS, WHCMSC, Woods Hole Coastal and Marine Science Center, chemical oceanography, environment, geoscientificInformation, mass spectroscopy, oceans, rocks and deposits, x-ray diffraction, x-ray fluorescence, Fewer tags Accelerator Mass Spectrometry (AMS) 14C radiocarbon analysis of authigenic carbonates collected offshore the U.S. Mid- and South Atlantic Results are presented from Accelerator Mass Spectrometry (AMS) carbon-14 radiocarbon dating of carbonate rock samples collected from seep fields offshore the U.S. Mid- and South Atlantic in 2018 and 2019. Samples were collected as a fingerprint to past hydrocarbon seep activity, fluid source, and depositional environment. Categories: Data; Tags: Atlantic Ocean, CMHRP, Chemical analysis, Coastal and Marine Hazards and Resources Program, Habitat, All tags... PCMSC, Pacific Coastal and Marine Science Center, U.S. Geological Survey, USGS, carbon-14 analysis, chemical oceanography, ecosystems, environment, geoscientificInformation, oceans, radiometric dating, Fewer tags Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch Variability in sediment properties with depth and the thickness of individual sedimentary layers are critical determinants of seabed acoustic response. The New England Mud Patch, located south of Cape Cod, is an unusual feature on the U.S. Continental Shelf in that it is composed of fine-grained sediment layers containing a relatively-homogeneous mix of sand, silt, and clay-sized particles bounded by more typical sandy shelf sediments. The unique characteristics and nature of this deposit is due to a derivation of sediments that have been transported to, and deposited in, a basal bowl-shaped depression since the last glacial maximum. Ninety-two piston, vibra-, and gravity cores with a maximum length of 8.2 meters... Categories: Data; Tags: Atlantic, GPS measurement, Holocene, Marine Geology, Martha's Vineyard, All tags... Massachusetts, NEMP, New England Mud Patch, Seabed Experiment Area, Sedimentology, Stratigraphy, U.S. Continental Shelf, biostratigraphy, bulk density, carbon, chemical analysis, clay deposits, core analysis, drilling and coring, earth material properties, faunal and floral census (microscopic), fossils, geolocation measurement, geology, grain-size analysis, gravity coring, image collections, magnetic susceptibility, magnetism, micropaleontology, paleontology, piston coring, porosity, sand deposits, sedimentology, sieve-size analysis, soil moisture, stratigraphy, subsampling, unconsolidated deposits, vibracoring, x-ray diffraction, Fewer tags