Grain size analyses of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA

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What does this data set describe?

Title:
Grain size analyses of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA
Abstract:
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 (NEMP), 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 were collected from across the New England Mud Patch during a 2-leg, 10-day cruise aboard the R/V Endeavor in the spring of 2016. Geologic characterization and analysis of a subset of the cores including grain size, CaCO3, mineral composition, and bulk index properties (undrained shear strength, water content, density, and porosity) of discrete samples was carried out at the USGS Woods Hole Coastal and Marine Science Center's (WHCMSC) Sediment Analysis Laboratory. This data release contains the results of these analyses, along with visual core descriptions and summary sheets for each core analyzed for this study.
Supplemental_Information:
Cores were collected on the 2016 R/V Endeavor cruise EN577 from April 19, 2016 to May 2, 2016. Information about this expedition, also known as USGS Field Activity 2016-001-FA, is available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-001-FA
  1. How might this data set be cited?
    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 20210819, Grain size analyses of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA: data release DOI: 10.5066/P9ZYK3PX, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZYK3PX.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.7979
    East_Bounding_Coordinate: -70.4370
    North_Bounding_Coordinate: 40.5952
    South_Bounding_Coordinate: 40.3058
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/60551970d34e1894882d0a38/?name=MudPatchCores_BrowseGraphic.png (PNG)
    Browse image of the core collection locations and spatial extent of the study area
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 19-Apr-2016
    Ending_Date: 02-May-2016
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0197464427. Longitudes are given to the nearest 0.0258271413. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is WGS_1984.
      The ellipsoid used is WGS_84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    EN577_GrainSize_PistonCores.csv
    Comma Separated Value (CSV) file containing grain-size data for NEMP piston cores. Point dataset. 770 data records. (Source: Producer Defined)
    SAMPLE_ID
    Sample ID. Naming convention: FFFFF-CC-P-GS-# (FFFFF= Field ID abbreviation) (CC=Core ID) (P=Piston Core) (GS= Grain Size Sample) (# = Sample Number) (Source: USGS) character string
    PROJECT
    Project group ID (Source: USGS)
    ValueDefinition
    ONR Mud PatchID for USGS project
    CRUISE ID
    Cruise identification code assigned by research vessel (Source: USGS)
    ValueDefinition
    EN577R/V Endeavor Cruise EN577, also known by WHCMSC field activity number 2016-001-FA
    CONTACT
    Contact for samples (Source: USGS)
    ValueDefinition
    JCHAYTORJason D. Chaytor
    AREA
    General area where samples were taken (Source: USGS)
    ValueDefinition
    Mud PatchSouthern New England Mud Patch
    CORE_ID
    Core identification number assigned in field. Naming convention EN577-XXPC (EN577=Cruise ID) (XX=Core number) (PC=Piston Core) (Source: USGS) character string
    LATITUDE
    Latitude of core that grain-size data came from (Source: USGS)
    Range of values
    Minimum:39.893954
    Maximum:40.50153
    Units:decimal degrees
    LONGITUDE
    Longitude of core that grain-size data came from (Source: USGS)
    Range of values
    Minimum:-70.948424
    Maximum:-70.482964
    Units:decimal degrees
    WATER_DEPTH
    Water depth at location where core was collected (Source: USGS)
    Range of values
    Minimum:69.3
    Maximum:645.0
    Units:Meters
    Resolution:0.1
    SAMPLE_DEPTH_TOP
    Top of interval that was sampled for grain-size analysis (Source: USGS)
    Range of values
    Minimum:3
    Maximum:780
    Units:centimeters
    SAMPLE_DEPTH_BOTTOM
    Bottom of interval that was sampled for grain-size analysis (Source: USGS)
    Range of values
    Minimum:4
    Maximum:781
    Units:centimeters
    DEVICE
    Device used to collect core (Source: USGS)
    ValueDefinition
    PISTON CORERPiston Corer
    DATE_COLLECTED
    Date that core was collected. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    DATE_ANALYZED
    Date that grain-size analysis was completed. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    WEIGHT
    Weight of dry sample (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.151
    Maximum:31.167
    Units:grams
    Resolution:0.001
    GRAVEL_PCT
    Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 Phi and coarser). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:28.87
    Units:percent
    Resolution:0.01
    SAND_PCT
    Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 Phi through 4 Phi). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.53
    Maximum:99.78
    Units:percent
    Resolution:0.01
    SILT_PCT
    Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 Phi through 8 Phi, inclusive). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:86.13
    Units:percent
    Resolution:0.01
    CLAY_PCT
    Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 Phi and finer). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:85.38
    Units:percent
    Resolution:0.01
    CLASSIFICATION
    Sediment description based on a rigorous definition, usually Shepard (1954) as modified by Schlee (1973) and Poppe and others ( 2005). (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    clayey siltSediment whose main phase is silt, but with significant clay.
    sand silt claySediment with significant (over 20 percent) sand, silt, and clay
    silty claySediment whose main phase is clay, but with significant silt.
    sandy siltSediment whose main phase is silt, but with significant sand.
    silty sandSediment whose main phase is silt, but with significant sand.
    sandSediment whose main phase is less than 2 mm, but greater than or equal to 0.062 mm.
    gravelly sedimentSediment with gravel component equal to or greater than 10 percent, but less than 50 percent
    claySediment whose main phase is less than 0.004 mm.
    clayey sandSediment whose main phase is sand, but with significant clay.
    siltSediment whose main phase is less than 2 mm but greater than or equal to 0.0625 mm; 0 phi through 4 phi
    MEDIAN
    Middle point in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.85
    Maximum:10.39
    Units:phi
    Resolution:0.01
    MEAN
    Average value in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.46
    Maximum:9.44
    Units:phi
    Resolution:0.01
    STDEV
    Standard deviation (root mean square of the deviations) of the grain size distribution in phi units (sorting). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.55
    Maximum:3.57
    Units:phi
    Resolution:0.01
    SKEWNESS
    Skewness (deviation from symmetrical form) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-2.24
    Maximum:5.17
    Units:phi
    Resolution:0.01
    KURTOSIS
    Kurtosis (degree of curvature near the mode) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.59
    Maximum:39.63
    Units:phi
    Resolution:0.01
    PHI11
    11 Phi - Weight percent of the sample in the 11 Phi fraction and finer (nominal diameter of particles less than 0.001 mm); fine clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:21.01
    Units:percent
    Resolution:0.01
    PHI10
    10 Phi - Weight percent of the sample in the 10 Phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:34.68
    Units:percent
    Resolution:0.01
    PHI9
    9 Phi - Weight percent of the sample in the 9 Phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:37.35
    Units:percent
    Resolution:0.01
    PHI8
    8 Phi - Weight percent of the sample in the 8 Phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:31.60
    Units:percent
    Resolution:0.01
    PHI7
    7 Phi - Weight percent of the sample in the 7 Phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:47.41
    Units:percent
    Resolution:0.01
    PHI6
    6 Phi - Weight percent of the sample in the 6 Phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:34.11
    Units:percent
    Resolution:0.01
    PHI5
    5 Phi - Weight percent of the sample in the 5 Phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:65.37
    Units:percent
    Resolution:0.01
    PHI4
    4 Phi - Weight percent of the sample in the 4 Phi fraction (nominal diameters of particles greater than or equal to .0625 mm, but less than 0.125 mm); very fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.5
    Maximum:85.89
    Units:percent
    Resolution:0.01
    PHI3
    3 Phi - Weight percent of the sample in the 3 Phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:68.25
    Units:percent
    Resolution:0.01
    PHI2
    2 Phi - Weight percent of the sample in the 2 Phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:81.9
    Units:percent
    Resolution:0.01
    PHI1
    1 Phi - Weight percent of the sample in the 1 Phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:43.01
    Units:percent
    Resolution:0.01
    PHI0
    0 Phi - Weight percent of the sample in the 0 Phi fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:16.68
    Units:percent
    Resolution:0.01
    PHIm1
    -1 Phi - Weight percent of the sample in the -1 Phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:4.85
    Units:percent
    Resolution:0.01
    PHIm2
    -2 Phi - Weight percent of the sample in the -2 Phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:28.19
    Units:percent
    Resolution:0.01
    PHIm3
    -3 Phi - Weight percent of the sample in the -3 Phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:11.66
    Units:percent
    Resolution:0.01
    PHIm4
    -4 Phi - Weight percent of the sample in the -4 Phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:17.72
    Units:percent
    Resolution:0.01
    PHIm5
    -5 Phi - Weight percent of the sample in the -5 Phi fraction and coarser (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles, cobbles, and boulders. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:6.93
    Units:percent
    Resolution:0.01
    ANALYST
    Analyst who performed grain size laboratory analysis (Source: USGS)
    ValueDefinition
    ARPAllison R. Paquette
    DATA QUALITY GRADE
    Samples are assigned a quality grade based on the examination of the analytical data. Data quality grades may be determined by several factors, and any comments or notes about the data for a particular sample are included in the results table for that sample under "comments". Quality grades for sample data that do not have any additional comments are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results. (Source: USGS)
    ValueDefinition
    ACoarse fraction percent differences between 0% and ±1.5%
    BCoarse fraction percent differences between ±1.5% and ±3%
    DCoarse fraction percent differences between percent differences greater than ±4.5%
    CCoarse fraction percent differences between ±3% and ±4.5%
    GRADE QUALIFIER
    Scientist who determined the data quality grade of sample (Source: USGS)
    ValueDefinition
    BJBBrian J. Buczkowski
    JDCJason D. Chaytor
    COMMENTS
    Information about percent difference between initial calculated coarse fraction (3 phi and coarser) weight and the sum of the sieved and weighed coarse material. (Source: USGS)
    ValueDefinition
    << empty cell >>No comments given for sample by grade qualifier
    character string; statement of justification for data quality grade
    EN577_GrainSize_TriggerCores.csv
    Comma Separated Value (CSV) file containing grain-size data for NEMP trigger cores. Point dataset. 77 data records. (Source: Producer Defined)
    SAMPLE_ID
    Sample ID. Naming convention: FFFFF-CC-T-GS-# (FFFFF= Field ID abbreviation) (CC=Core ID) (T=Trigger Core) (GS= Indicates Grain Size Sample) (# = Sample Number) (Source: Producer Defined) character string
    FAN
    Field activity number assigned by center. (Source: USGS)
    ValueDefinition
    2016-001-FAR/V Endeavor Cruise EN577
    CONTACT
    Contact for samples (Source: Producer Defined)
    ValueDefinition
    JCHAYTORJason D. Chaytor
    AREA
    General area where samples were taken (Source: Producer Defined)
    ValueDefinition
    Southern New England Mud PatchSouthern New England Mud Patch
    CORE_ID
    Core identification number assigned in field. Naming convention EN577-XXPC (EN577=Cruise ID) (XX=Core number) (PC=Piston Core) (Source: Producer Defined) character string
    LATITUDE
    Latitude of core that grain-size data came from (Source: USGS)
    Range of values
    Minimum:40.305839
    Maximum:40.520818
    Units:decimal degrees
    LONGITUDE
    Longitude of core that grain-size data came from (Source: Producer Defined)
    Range of values
    Minimum:-70.7472293
    Maximum:-70.482964
    Units:decimal degrees
    WATER_DEPTH
    Water depth at location where core was collected (Source: USGS)
    Range of values
    Minimum:68.6
    Maximum:107.9
    Units:Meters
    Resolution:0.1
    SAMPLE_DEPTH_TOP
    Top of interval that was sampled for grain-size analysis (Source: Producer Defined)
    Range of values
    Minimum:0
    Maximum:65
    Units:centimeters
    SAMPLE_DEPTH_BOTTOM
    Bottom of interval that was sampled for grain-size analysis (Source: Producer Defined)
    Range of values
    Minimum:1
    Maximum:66
    Units:centimeters
    DEVICE
    Device used to collect core (Source: Producer Defined)
    ValueDefinition
    PISTON CORERPiston Corer
    DATE_COLLECTED
    Date that core was collected. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    DATE_ANALYZED
    Date that grain-size analysis was completed. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    WEIGHT
    Weight of dry sample (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:4.367
    Maximum:10.760
    Units:grams
    Resolution:0.001
    GRAVEL_PCT
    Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 Phi and coarser). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:2.29
    Units:percent
    Resolution:0.01
    SAND_PCT
    Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 Phi through 4 Phi). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:10.56
    Maximum:56.33
    Units:percent
    Resolution:0.01
    SILT_PCT
    Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 Phi through 8 Phi, inclusive). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:31.43
    Maximum:80.61
    Units:percent
    Resolution:0.01
    CLAY_PCT
    Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 Phi and finer). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:40.82
    Units:percent
    Resolution:0.01
    CLASSIFICATION
    Sediment description based on a rigorous definition, usually Shepard (1954) as modified by Schlee (1973) and Poppe and others ( 2005). (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    clayey siltSediment whose main phase is silt, but with significant clay.
    sand silt claySediment with significant (over 20 percent) sand, silt, and clay
    silty claySediment whose main phase is clay, but with significant silt.
    sandy siltSediment whose main phase is silt, but with significant sand.
    silty sandSediment whose main phase is silt, but with significant sand.
    sandSediment whose main phase is less than 2 mm, but greater than or equal to 0.062 mm.
    gravelly sedimentSediment with gravel component equal to or greater than 10 percent, but less than 50 percent
    claySediment whose main phase is less than 0.004 mm.
    clayey sandSediment whose main phase is sand, but with significant clay.
    siltSediment whose main phase is less than 2 mm but greater than or equal to 0.0625 mm; 0 phi through 4 phi
    MEDIAN
    Middle point in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:3.89
    Maximum:7.56
    Units:phi
    Resolution:0.01
    MEAN
    Average value in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:4.54
    Maximum:6.99
    Units:phi
    Resolution:0.01
    STDEV
    Standard deviation (root mean square of the deviations) of the grain size distribution in phi units (sorting). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.31
    Maximum:2.33
    Units:phi
    Resolution:0.01
    SKEWNESS
    Skewness (deviation from symmetrical form) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.82
    Maximum:1.56
    Units:phi
    Resolution:0.01
    KURTOSIS
    Kurtosis (degree of curvature near the mode) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.13
    Maximum:5.99
    Units:phi
    Resolution:0.01
    PHI11
    11 Phi - Weight percent of the sample in the 11 Phi fraction and finer (nominal diameter of particles less than 0.001 mm); fine clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:11.17
    Units:percent
    Resolution:0.01
    PHI10
    10 Phi - Weight percent of the sample in the 10 Phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:14.55
    Units:percent
    Resolution:0.01
    PHI9
    9 Phi - Weight percent of the sample in the 9 Phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:26.14
    Units:percent
    Resolution:0.01
    PHI8
    8 Phi - Weight percent of the sample in the 8 Phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.07
    Maximum:29.90
    Units:percent
    Resolution:0.01
    PHI7
    7 Phi - Weight percent of the sample in the 7 Phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:4.55
    Maximum:51.54
    Units:percent
    Resolution:0.01
    PHI6
    6 Phi - Weight percent of the sample in the 6 Phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:4.11
    Maximum:32.75
    Units:percent
    Resolution:0.01
    PHI5
    5 Phi - Weight percent of the sample in the 5 Phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.53
    Maximum:60.07
    Units:percent
    Resolution:0.01
    PHI4
    4 Phi - Weight percent of the sample in the 4 Phi fraction (nominal diameters of particles greater than or equal to .0625 mm, but less than 0.125 mm); very fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:10.51
    Maximum:55.15
    Units:percent
    Resolution:0.01
    PHI3
    3 Phi - Weight percent of the sample in the 3 Phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:1.44
    Units:percent
    Resolution:0.01
    PHI2
    2 Phi - Weight percent of the sample in the 2 Phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.37
    Units:percent
    Resolution:0.01
    PHI1
    1 Phi - Weight percent of the sample in the 1 Phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:0.19
    Units:percent
    Resolution:0.01
    PHI0
    0 Phi - Weight percent of the sample in the 0 Phi fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.12
    Units:percent
    Resolution:0.01
    PHIm1
    -1 Phi - Weight percent of the sample in the -1 Phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.22
    Units:percent
    Resolution:0.01
    PHIm2
    -2 Phi - Weight percent of the sample in the -2 Phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:2.18
    Units:percent
    Resolution:0.01
    PHIm3
    -3 Phi - Weight percent of the sample in the -3 Phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.0
    Maximum:0.00
    Units:percent
    Resolution:0.01
    PHIm4
    -4 Phi - Weight percent of the sample in the -4 Phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.00
    Units:percent
    Resolution:0.01
    PHIm5
    -5 Phi - Weight percent of the sample in the -5 Phi fraction and coarser (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles, cobbles, and boulders. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.00
    Units:percent
    Resolution:0.01
    ANALYST
    Analyst who performed grain size laboratory analysiss (Source: Producer Defined)
    ValueDefinition
    ARPAllison R. Paquette
    DATA QUALITY GRADE
    Samples are assigned a quality grade based on the examination of the analytical data. Data quality grades may be determined by several factors, and any comments or notes about the data for a particular sample are included in the results table for that sample under "comments". Quality grades for sample data that do not have any additional comments are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results. (Source: Producer Defined)
    ValueDefinition
    ACoarse fraction percent differences between 0% and ±1.5%
    BCoarse fraction percent differences between ±1.5% and ±3%
    CCoarse fraction percent differences between ±3% and ±4.5%
    GRADE QUALIFIER
    Scientist who determined the data quality grade of sample (Source: Producer Defined)
    ValueDefinition
    BJBBrian J. Buczkowski
    JDCJason D. Chaytor
    COMMENTS
    Information about percent difference between initial calculated coarse fraction (3 phi and coarser) weight and the sum of the sieved and weighed coarse material. (Source: Producer Defined)
    ValueDefinition
    << empty cell >>No comments given for sample by grade qualifier
    character string; statement of justification for data quality grade
    EN577_GrainSize_AcousticCores.csv
    Comma Separated Value (CSV) file containing grain size data for NEMP acoustic/gravity cores. Point dataset. 58 data records. (Source: Producer Defined)
    SAMPLE_ID
    Sample ID. Naming convention: FFFFF-CC-G-GS-# (FFFFF= Field ID abbreviation) (CC=Core ID) (G=Gravity/Acoustic Core) (GS= Indicates Grain Size Sample) (# = Sample Number) (Source: Producer Defined) character string
    FAN
    Field activity number assigned by center. (Source: USGS)
    ValueDefinition
    2016-001-FAR/V Endeavor Cruise EN577
    CONTACT
    Contact for samples (Source: Producer Defined)
    ValueDefinition
    JCHAYTORJason D. Chaytor
    AREA
    General area where samples were taken (Source: Producer Defined)
    ValueDefinition
    Mud PatchSouthern New England Mud Patch
    CORE_ID
    Core identification number assigned in field. Naming convention EN577-ACXX (EN577=Cruise ID) (AC Core) (XX=Core number) (Source: Producer Defined) character string
    LATITUDE
    Latitude of core that grain-size data came from (Source: USGS)
    Range of values
    Minimum:40.4329
    Maximum:40.48132
    Units:decimal degrees
    LONGITUDE
    Longitude of core that grain-size data came from (Source: Producer Defined)
    Range of values
    Minimum:-70.792517
    Maximum:-70.59867
    Units:decimal degrees
    WATER_DEPTH
    Water depth at location where core was collected (Source: USGS)
    Range of values
    Minimum:76
    Maximum:86
    Units:Meters
    Resolution:1
    SAMPLE_DEPTH_TOP
    Top of interval that was sampled for grain-size analysis (Source: Producer Defined)
    Range of values
    Minimum:2
    Maximum:226
    Units:centimeters
    SAMPLE_DEPTH_BOTTOM
    Bottom of interval that was sampled for grain-size analysis (Source: Producer Defined)
    Range of values
    Minimum:3
    Maximum:227
    Units:centimeters
    DEVICE
    Device used to collect core (Source: Producer Defined)
    ValueDefinition
    GRAVITY (ACOUSTIC) CORERGravity (Acoustic) Corer
    DATE_COLLECTED
    Date that core was collected. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    DATE_ANALYZED
    Date that grain-size analysis was completed. Format: MM/DD/YYYY (MM= Month) (DD=Day) (YYYY=Year) (Source: USGS) character string
    WEIGHT
    Weight of dry sample (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:3.3660
    Maximum:11.5893
    Units:grams
    Resolution:0.001
    GRAVEL_PCT
    Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 Phi and coarser). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:5.75
    Units:percent
    Resolution:0.01
    SAND_PCT
    Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 Phi through 4 Phi). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:6.48
    Maximum:64.72
    Units:percent
    Resolution:0.01
    SILT_PCT
    Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 Phi through 8 Phi, inclusive). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:23.48
    Maximum:78.19
    Units:percent
    Resolution:0.01
    CLAY_PCT
    Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 Phi and finer). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:3.82
    Maximum:47.89
    Units:percent
    Resolution:0.01
    CLASSIFICATION
    Sediment description based on a rigorous definition, usually Shepard (1954) as modified by Schlee (1973) and Poppe and others ( 2005). (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    clayey siltSediment whose main phase is silt, but with significant clay.
    sand silt claySediment with significant (over 20 percent) sand, silt, and clay
    silty claySediment whose main phase is clay, but with significant silt.
    sandy siltSediment whose main phase is silt, but with significant sand.
    silty sandSediment whose main phase is silt, but with significant sand.
    sandSediment whose main phase is less than 2 mm, but greater than or equal to 0.062 mm.
    gravelly sedimentSediment with gravel component equal to or greater than 10 percent, but less than 50 percent
    claySediment whose main phase is less than 0.004 mm.
    clayey sandSediment whose main phase is sand, but with significant clay.
    siltSediment whose main phase is less than 2 mm but greater than or equal to 0.0625 mm; 0 phi through 4 phi
    MEDIAN
    Middle point in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.39
    Maximum:7.88
    Units:phi
    Resolution:0.01
    MEAN
    Average value in the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:3.03
    Maximum:7.01
    Units:phi
    Resolution:0.01
    STDEV
    Standard deviation (root mean square of the deviations) of the grain size distribution in phi units (sorting). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.57
    Maximum:2.78
    Units:phi
    Resolution:0.01
    SKEWNESS
    Skewness (deviation from symmetrical form) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-2.24
    Maximum:5.17
    Units:phi
    Resolution:0.01
    KURTOSIS
    Kurtosis (degree of curvature near the mode) of the grain size distribution in phi units. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.13
    Maximum:3.03
    Units:phi
    Resolution:0.01
    PHI11
    11 Phi - Weight percent of the sample in the 11 Phi fraction and finer (nominal diameter of particles less than 0.001 mm); fine clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:13.17
    Units:percent
    Resolution:0.01
    PHI10
    10 Phi - Weight percent of the sample in the 10 Phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:18.26
    Units:percent
    Resolution:0.01
    PHI9
    9 Phi - Weight percent of the sample in the 9 Phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.90
    Maximum:28.62
    Units:percent
    Resolution:0.01
    PHI8
    8 Phi - Weight percent of the sample in the 8 Phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:4.08
    Maximum:29.90
    Units:percent
    Resolution:0.01
    PHI7
    7 Phi - Weight percent of the sample in the 7 Phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:3.35
    Maximum:24.82
    Units:percent
    Resolution:0.01
    PHI6
    6 Phi - Weight percent of the sample in the 6 Phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.14
    Maximum:25.28
    Units:percent
    Resolution:0.01
    PHI5
    5 Phi - Weight percent of the sample in the 5 Phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.79
    Maximum:53.40
    Units:percent
    Resolution:0.01
    PHI4
    4 Phi - Weight percent of the sample in the 4 Phi fraction (nominal diameters of particles greater than or equal to .0625 mm, but less than 0.125 mm); very fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:6.42
    Maximum:27.91
    Units:percent
    Resolution:0.01
    PHI3
    3 Phi - Weight percent of the sample in the 3 Phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:16.66
    Units:percent
    Resolution:0.01
    PHI2
    2 Phi - Weight percent of the sample in the 2 Phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:26.88
    Units:percent
    Resolution:0.01
    PHI1
    1 Phi - Weight percent of the sample in the 1 Phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:9.87
    Units:percent
    Resolution:0.01
    PHI0
    0 Phi - Weight percent of the sample in the 0 Phi fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:1.18
    Units:percent
    Resolution:0.01
    PHIm1
    -1 Phi - Weight percent of the sample in the -1 Phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:1.28
    Units:percent
    Resolution:0.01
    PHIm2
    -2 Phi - Weight percent of the sample in the -2 Phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:4.47
    Units:percent
    Resolution:0.01
    PHIm3
    -3 Phi - Weight percent of the sample in the -3 Phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.00
    Units:percent
    Resolution:0.01
    PHIm4
    -4 Phi - Weight percent of the sample in the -4 Phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.00
    Units:percent
    Resolution:0.01
    PHIm5
    -5 Phi - Weight percent of the sample in the -5 Phi fraction and coarser (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles, cobbles, and boulders. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.00
    Maximum:0.00
    Units:percent
    Resolution:0.01
    ANALYST
    Analyst who performed grain size laboratory analysiss (Source: Producer Defined)
    ValueDefinition
    ARPAllison R. Paquette
    DATA QUALITY GRADE
    Samples are assigned a quality grade based on the examination of the analytical data. Data quality grades may be determined by several factors, and any comments or notes about the data for a particular sample are included in the results table for that sample under "comments". Quality grades for sample data that do not have any additional comments are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results. (Source: Producer Defined)
    ValueDefinition
    ACoarse fraction percent differences between 0% and ±1.5%
    BCoarse fraction percent differences between ±1.5% and ±3%
    DCoarse fraction percent differences between percent differences greater than ±4.5%
    CCoarse fraction percent differences between ±3% and ±4.5%
    GRADE QUALIFIER
    Scientist who determined the data quality grade of sample (Source: Producer Defined)
    ValueDefinition
    BJBBrian J. Buczkowski
    JDCJason D. Chaytor
    COMMENTS
    Information about percent difference between initial calculated coarse fraction (3 phi and coarser) weight and the sum of the sieved and weighed coarse material. (Source: Producer Defined)
    ValueDefinition
    << empty cell >>No comments given for sample by grade qualifier
    character string; statement of justification for data quality grade
    Entity_and_Attribute_Overview:
    Finalized undrained grain size data was taken from a master table of calculations and compiled into three CSV (comma-separated value)spreadsheet files pertaining to each core type (piston, trigger, and acoustic cores).
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • A.A. Boggess
    • B.J. Buczkowski
    • J.D. Chaytor
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Jason Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov

Why was the data set created?

The data gained through the analyses of cores collected from the New England Mud Patch help provide a comprehensive understanding of the nature and properties of the sediments found in this geographic location. Grain size analyses were used to define the grain size distribution and sedimentary character of samples collected from the cores.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2016 (process 1 of 5)
    Each core was cut into sections on the ship during collection. The cores were then split into halves in the core lab. Subsamples (1- cm thick) were taken from the split cores for grain size analysis. Person who carried out this activity:
    Jason Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov
    Date: 2020 (process 2 of 5)
    Samples submitted to the sediment analysis laboratory for grain size analysis using the Beckman Coulter Multisizer3 and sieving of the ≥ 4 phi fraction are assigned internal analysis identifiers to record the measurement data. About 50 grams of wet sediment are placed in a pre-weighed beaker, weighed, oven dried at 100°C, and reweighed to correct for salt. The dried sample is wet sieved through a 0.062 mm (No. 230) sieve. The coarse fraction remaining in the sieve is oven dried at 100°C (until completely dried) and weighed. The fine fraction in water is collected in a plastic Nalgene bottle and sealed with a screw lid (stored for no longer than one week). The coarse fraction is dry sieved to determine the individual weights of the 4 to -5 phi fractions, and the weights are recorded in the data entry spreadsheet. At the request of the submitter, shell and shell fragments can be manually removed from the -2 phi and coarser fractions, weighed and their weights are recorded in the data entry spreadsheet. The fine fraction is run and combined using the 200 μm and 30 μm Coulter analyses using the Multisizer3 software (version 3.53) to get the fine fraction grain size distribution. The fine fraction distribution data are added to the data entry spreadsheet. The spreadsheet is used to calculate a continuous phi class distribution from the original fractions. Person who carried out this activity:
    Allyson A Boggess
    U.S. Geological Survey, NORTHEAST REGION
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2341 (voice)
    508-457-2310 (FAX)
    aboggess@usgs.gov
    Date: 2020 (process 3 of 5)
    Continuous phi class distribution from the original fractions are transposed to the "results" tab in the macro-enabled Microsoft Excel data entry workbook with a unique identifier assigned to the sample submission. Macros in the workbook are run to calculate grain size classification and statistical analyses. Sample, navigation, and field identifiers, along with continuous phi class distribution data, grain size classification, and statistical analysis results are copied and pasted into a final Microsoft Excel spreadsheet for each sample submission batch . The processed data are quality control checked and assigned a quality grade based on the examination of the analytical data. Processed data are released to the submitter and incorporated into the laboratory's database. All raw analytical data generated by the samples are archived in the sediment analysis laboratory. Person who carried out this activity:
    Brian Buczkowski
    U.S. Geological Survey, Northeast Region
    Physical Scientist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2361 (voice)
    508-457-2310 (FAX)
    bbuczkowski@usgs.gov
    Date: 2020 (process 4 of 5)
    Finalized grain-size data was taken from individual batch tables and compiled into three CSV (comma-separated value)spreadsheets of data pertaining to each core type (piston, trigger, and acoustic cores). Person who carried out this activity:
    Allyson A Boggess
    U.S. Geological Survey, NORTHEAST REGION
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2341 (voice)
    508-457-2310 (FAX)
    aboggess@usgs.gov
    Date: 17-Nov-2021 (process 5 of 5)
    Tweaked a thesaurus name (20211117). Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Chaytor, Jason D., Ballard, Megan S., Buczkowski, Brian J., Goff, John A., Lee, Kevin M., Reed, Allen H., and Boggess, Allyson A., 2021, Measurements of Geologic Characteristics and Geophysical Properties of Sediments from the New England Mud Patch: IEEE Oceanic Engineering Society, Piscataway, NJ.

    Online Links:

    Other_Citation_Details:
    This journal article is the publication supported by this data release.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Data quality grades have been assigned to each sample analysis, indicating the accuracy of the grain size distribution of the sample's coarse fraction. Standards are regularly run for quality control on the Beckman Coulter Multisizer3, ensuring accuracy of grain-size measurements of the fine fractions.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Of the 98 cores collected during the R/V Endeavor EN577 cruise, 66 cores were analyzed for this grain-size dataset. Cores chosen for analysis were those that were thought to represent the full range of sediments expected to be encountered. Any cores omitted from analysis were not included because the coring locations were in close proximity to previously analyzed cores.
  5. How consistent are the relationships among the observations, including topology?
    Samples' quantified grain size classification, calculated with workbook macros (see Process Step 3), were compared to the qualitative grain size classification described by observers on the core's visual description. This was done to ensure that the actual grain-size data was consistent with expected results determined by inspection of physical samples.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None.
Use_Constraints:
Not to be used for navigation. The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? The dataset includes the data files (EN577_GrainSize_PistonCores.csv, EN577_GrainSize_TriggerCores.csv, EN577_GrainSize_AcousticCores.csv), the browse graphic (MudPatchCores_BrowseGraphic.png) and the FGDC CSDGM metadata in XML format (EN577_GrainSize_Metadata.xml).
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 17-Nov-2021
Metadata author:
Allyson A Boggess
U.S. Geological Survey, NORTHEAST REGION
Geologist
384 Woods Hole Road
Woods Hole, MA
US

508-548-8700 x2341 (voice)
508-457-2310 (FAX)
aboggess@usgs.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9ZYK3PX/EN577_GrainSize_Metadata.faq.html>
Generated by mp version 2.9.50 on Thu Nov 18 14:49:53 2021