Sediment grain-size data from vibracore samples collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18

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What does this data set describe?

Title:
Sediment grain-size data from vibracore samples collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18
Abstract:
This section of the data release contains grain-size and total organic carbon (TOC) analyses of 132 samples taken from vibracores that were collected aboard the R/V Bold Horizon in 2019 on U.S. Geological Survey Field Activity 2019-649-FA offshore San Francisco, California. The samples were analyzed for percent weight of grain size and total organic carbon. The samples were taken at approx. 50 cm intervals from (and including) the core-catcher, which represents the bottom of the core.
Supplemental_Information:
Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-649-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Lorenson, Thomas D., Sliter, Ray W., Conrad, James E., Papesh, Antoinette F., and Warrick, Jonathan A., 2021, Sediment grain-size data from vibracore samples collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18: data release DOI:10.5066/P9LBG9H5, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Sliter, Ray W., Conrad, James E., Lorenson, Thomas D., Papesh, Antoinette G., Balster-Gee, Alicia F., and Warrick, Jonathan A., 2021, Geophysical and core sample data collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18: data release DOI:10.5066/P9LBG9H5, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.87083
    East_Bounding_Coordinate: -122.39324
    North_Bounding_Coordinate: 38.01347
    South_Bounding_Coordinate: 37.49665
  3. What does it look like?
    2019-649-FA_tracks_and_cores.png (PNG)
    Map showing locations of vibracore sites (purple dots) and tracklines (blue) along which chirp seismic data were collected.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 02-Nov-2019
    Currentness_Reference:
    ground condition at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (132)
    2. What coordinate system is used to represent geographic features?
      The map projection used is WGS 1984 UTM Zone 11N.
      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -117.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.0001
      Ordinates (y-coordinates) are specified to the nearest 0.0001
      Planar coordinates are specified in Meter
      The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    Attribute table
    Table containing attribute information associated with the dataset (Source: Producer defined)
    FAN ID
    Unique U.S. Geological Survey field activity identifier (Source: producer defined) Unique identifier for the U.S. Geological Survey field activity
    Sample ID
    Name of sample (Source: producer defined) Unique identifier for the sample used given in the field
    Lab ID
    Name of sample identifier in YY-FFFFF-XX format, where YY is the 2-digit year (for example 16=2016, 99=1999), FFFFF is the 5-digit field-activity-number (FAN) ID code, and XX is a sequential number given to the sample in the lab. (Source: Producer defined) Unique identifier for the sample given during analysis in the lab
    Date Collected
    Date of sample collection in mm/dd/yyyy format (Source: producer defined)
    Range of values
    Minimum:10/12/2019
    Maximum:10/17/2019
    Units:Dates in mm/dd/yyyy format
    Latitude
    Latitude of sample in decimal degrees (Source: producer defined)
    Range of values
    Minimum:37.57416
    Maximum:37.87461
    Units:decimal degrees
    Longitude
    Longitude of sample in decimal degrees (Source: producer defined)
    Range of values
    Minimum:-122.67767
    Maximum:-122.54202
    Units:decimal degrees
    Water Depth m
    water depth at sample site (Source: producer defined)
    Range of values
    Minimum:16
    Maximum:45
    Units:meters
    Sample Depth cm
    sample depth from top of core (Source: producer defined)
    Range of values
    Minimum:9
    Maximum:178
    Units:centimeters
    Wt. percent in -4.00 phi bin or 16 mm bin
    Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -3.75 phi bin or 13.5 mm bin
    Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -3.50 phi bin or 11.2 mm bin
    Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -3.25 phi bin or 9.51 mm bin
    Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -3.00 phi bin or 8 mm bin
    Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -2.75 phi bin or 6.73 mm bin
    Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -2.50 phi bin or 5.66 mm bin
    Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -2.25 phi bin or 4.76 mm bin
    Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -2.25 phi bin or 4.76 mm bin
    Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -2.00 phi bin or 4 mm bin
    Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -1.75 phi bin or 3.36 mm bin
    Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -1.50 phi bin or 2.83 mm bin
    Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -1.25 phi bin or 2.38 mm bin
    Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -1.00 phi bin or 2 mm bin
    Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -0.75 phi bin or 1.68 mm bin
    Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -0.50 phi bin or 1.41 mm bin
    Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in -0.25 phi bin or 1.19 mm bin
    Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 0.00 phi bin or 1 mm bin
    Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 0.25 phi bin or 0.8409 mm bin
    Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 0.50 phi bin or 0.7071 mm bin
    Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 0.75 phi bin or 0.5946 mm bin
    Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 1.00 phi bin or 0.5 mm bin
    Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 1.25 phi bin or 0.4204 mm bin
    Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 1.50 phi bin or 0.3536 mm bin
    Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 1.75 phi bin or 0.2973 mm bin
    Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 2.00 phi bin or 0.25 mm bin
    Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 2.25 phi bin or 0.2102 mm bin
    Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 2.50 phi bin or 0.1768 mm bin
    Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 2.75 phi bin or 0.1487 mm bin
    Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 3.00 phi bin or 0.125 mm bin
    Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 3.25 phi bin or 0.1051 mm bin
    Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 3.50 phi bin or 0.08839 mm bin
    Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.08839 and 0.1051 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 3.75 phi bin or 0.07433 mm bin
    Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 3.75 phi bin or 0.07433 mm bin
    Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 4.00 phi bin or 0.0625 mm bin
    Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.07433 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 4.25 phi bin or 0.052556 mm bin
    Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 4.50 phi bin or 0.044194 mm bin
    Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 4.75 phi bin or 0.037163 mm bin
    Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 5.00 phi bin or 0.03125 mm bin
    Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 5.25 phi bin or 0.02628 mm bin
    Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.02628 and 0.03125 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 5.50 phi bin or 0.0221 mm bin
    Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.0221 and 0.02628 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 5.75 phi bin or 0.01858 mm bin
    Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.01858 and 0.0221 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 6.00 phi bin or 0.01563 mm bin
    Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.01563 and 0.01858 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 6.25 phi bin or 0.01314 mm bin
    Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.01314 and 0.01563 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 6.50 phi bin or 0.01105 mm bin
    Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.01105 and 0.01314 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 6.75 phi bin or 0.00929 mm bin
    Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.00929 and 0.01105 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 7.00 phi bin or 0.00781 mm bin
    Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.00781 and 0.00929 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 7.25 phi bin or 0.00657 mm bin
    Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.00781 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 7.50 phi bin or 0.00552 mm bin
    Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.00552 and 0.00657 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 7.75 phi bin or 0.00465 mm bin
    Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.00465 and 0.00552 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 8.00 phi bin or 0.00391 mm bin
    Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.00391 and 0.00465 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 8.25 phi bin or 0.00329 mm bin
    Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.00329 and 0.00391 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 8.50 phi bin or 0.00276 mm bin
    Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.00276 and 0.00329 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 8.75 phi bin or 0.00232 mm bin
    Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.00232 and 0.00276 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 9.00 phi bin or 0.00195 mm bin
    Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.00195 and 0.00232 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 9.25 phi bin or 0.00164 mm bin
    Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.00164 and 0.00195 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 9.50 phi bin or 0.00138 mm bin
    Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.00138 and 0.00164 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 9.75 phi bin or 0.00116 mm bin
    Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.00116 and 0.00138 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 9.99 phi bin or 0.00098 mm bin
    Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.00098 and 0.00116 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 10.25 phi bin or 0.00082 mm bin
    Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.00082 and 0.00098 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 10.50 phi bin or 0.00069 mm bin
    Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.00069 and 0.00082 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 10.75 phi bin or 0.00058 mm bin
    Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.00058 and 0.00069 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 10.99 phi bin or 0.00049 mm bin
    Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.00049 and 0.00058 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 11.25 phi bin or 0.0004 mm bin
    Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.0004 and 0.00049 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 11.48 phi bin or 0.00035 mm bin
    Weight percent of sample with grain diameter between 11.25 and 11.48 phi, or 0.00035 and 0.0004 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 12.02 phi bin or 0.000241 mm bin
    Weight percent of sample with grain diameter between 11.48 and 12.02 phi, or 0.000241 and 0.00035 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Wt. percent in 13.02 phi bin or 0.00012 mm bin
    Weight percent of sample with grain diameter between 12.02 and 13.02 phi, or 0.00012 and 0.000241 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Percent Gravel
    percent of sample greater than 2 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Percent Sand
    percent of sample less than 2 mm and greater than 63 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Percent Silt
    percent of sample less than 63 microns and greater than 4 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Percent Clay
    percent of sample less than 4 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Percent Mud
    percent of sample less than 63 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Gravel to Sand Ratio
    ratio of percent gravel in sample to percent sand. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    Sand to Silt Ratio
    ratio of percent sand in sample to percent silt. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    Silt to Clay Ratio
    ratio of percent silt in sample to percent clay. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    Sand to Clay Ratio
    ratio of percent sand in sample to percent clay. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    Sand to Mud Ratio
    ratio of percent sand in sample to percent mud. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    Gravel to Mud Ratio
    ratio of percent gravel in sample to percent mud. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:no unit
    D5 Phi
    Phi size at D5 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D10 Phi
    Phi size at D10 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D16 Phi
    Phi size at D16 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D25 Phi
    Phi size at D25 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D50 Phi
    Phi size at D50 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D75 Phi
    Phi size at D75 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D84 Phi
    Phi size at D84 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D90 Phi
    Phi size at D90 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D95 Phi
    Phi size at D95 for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    D5 mm
    mm size at D5 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D10 mm
    mm size at D10 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D16 mm
    mm size at D16 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D25 mm
    mm size at D25 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D50 mm
    mm size at D50 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D75 mm
    mm size at D75 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D84 mm
    mm size at D84 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D90 mm
    mm size at D90 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    D95 mm
    mm size at D95 for sample. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    F-W Median Phi
    Phi size median for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    F-W Mean Phi
    Phi size mean for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    F-W Sorting Phi
    sorting for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    F-W Skewness Phi
    skewness for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    F-W Kurtosis Phi
    kurtosis for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Median Phi
    Phi size median for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Mean Phi
    Phi size mean for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Sorting Phi
    sorting for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Skew 16-84 Phi
    skewness for sample (D16-D84) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Skew 05-95 Phi
    skewness for sample (D05-D95) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Inman Kurtosis Phi
    kurtosis for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Trask Median mm
    mm size median for sample by Trask (mm) method. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    Trask Mean mm
    mm size mean for sample by Trask (mm) method. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    Trask Sorting mm
    sorting for sample by Trask (mm) method. (Source: producer defined)
    Range of values
    Minimum:0.00098
    Maximum:256
    Units:millimeters
    Trask Skewness mm
    skewness for sample by Trask (mm) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:millimeters
    Trask Kurtosis mm
    kurtosis for sample by Trask (mm) method. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:millimeters
    Mean Phi
    phi size mean for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Mean mm
    mm size mean for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:millimeters
    Variance Phi
    variance for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Std. Dev. Phi
    standard deviation for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Skewness Phi
    skewness for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Kurtosis Phi
    kurtosis for sample. (Source: producer defined)
    Range of values
    Minimum:10
    Maximum:-8
    Units:Phi size
    Wt. percent total carbon
    total weight percentage of carbon for sample. (Source: producer defined)
    Range of values
    Minimum:0.022
    Maximum:1.835
    Units:percent
    Wt. percent total organic carbon
    total weight percentage of organic carbon for sample. (Source: producer defined)
    Range of values
    Minimum:0.009
    Maximum:1.792
    Units:percent
    Wt. percent total inorganic carbon
    total weight percentage of inorganic carbon for sample. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:0.832
    Units:percent
    Wt. percent calcium carbonate
    weight percentage of calcium carbonate for sample. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:6.931
    Units:percent
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    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)
    • Thomas D. Lorenson
    • Ray W. Sliter
    • James E. Conrad
    • Antoinette F. Papesh
    • Jonathan A. Warrick
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

The U.S. Geological Survey (USGS) analyzed grain size from samples taken from vibracores collected in 2019 offshore San Francisco, California. Samples were used to assess sand and gravel resources in Federal and State waters for potential use in future beach nourishment projects along stretches of the coast where critical erosion hotspots have been identified. This cruise was funded through partnerships with the Bureau of Ocean Energy Management (BOEM) and the State of California Ocean Protection Council (OPC).

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: 17-Oct-2019 (process 1 of 4)
    34 cores were collected on cruise 2019-649-FA with a Rossfelder P-5 vibracorer.
    Date: 02-Nov-2019 (process 2 of 4)
    132 sediment samples were collected from 34 cores. The samples were taken at approx. 50 cm intervals from (and including) the core-catcher, which represents the bottom of the core. Core data: hi-resolution photos, Core logging: whole core P-wave velocity, gamma density and magnetic susceptibility. Core Description - visual core inspection and description.
    Date: 15-Dec-2019 (process 3 of 4)
    The grain-size distributions of sediment samples were determined in the USGS Pacific Coastal and Marine Science Center (PCMSC) sediment lab. Approximately 20g of sediment was sub-sampled and 10mL of 35 percent hydrogen peroxide was added to sit overnight to remove organics. The sample was heated at 250 degree C to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the mud (silt and clay) fraction. Subsequently the sample was centrifuged for 1/2 hour and 1 hour to remove soluble salts. Samples were funneled through a 2mm and a 63um sieve to separate the gravel (>2mm), sand (63um to 2mm), and mud (<63um). Both sand and gravel fractions were dried in an 80 degree C oven and weighed. 5mL of 10 percent sodium hexametaphosphate was added to the mud fraction cylinder and distilled water was added to total the volume to 1L. The mud and calgon solution sat overnight to ensure removal of the negative charges from the mud particles. Subsequently, a 20mL aliquot was taken from the 1L mud fraction to determine the weight of the mud. The particle size distribution of the mud and sand fractions were analyzed separately via the Beckman Coulter LS 13 320 aqueous liquid module. The gravel fraction particle size was analyzed via dry sieving. The gravel, sand, and mud grain-size data were all reincorporated back together using the pcSDSZ program in the PCMSC sediment lab and the grain size data was reported in percent 1/4-phi size intervals. Person who carried out this activity:
    Angela Tan
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    lab technician
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    atan@usgs.gov
    Date: 13-Oct-2021 (process 4 of 4)
    Performed minor edits to the metadata to correct typos. No data were changed Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan A. Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?
    Identified as best available version
  2. How accurate are the geographic locations?
    Position data were provided by a Hemisphere V100 Global Positioning System using L1, C/A code and carrier phase smoothing with a stated accuracy of 60 centimeters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Sediment samples were collected in the lab from vibracores collected during USGS cruise 2019-649-FA using a P-5 Rossfelder vibracorer. The samples were taken at regular intervals, bagged, and labeled. Quality control was conducted during the sample collection process.

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:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey (USGS, the Bureau of Ocean Energy Management (BOEM), and the California Geological Survey (CGS) as the originator(s) of the dataset and in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA

    1-831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? 2019-649-FA_grainsize.csv contains grain size data for samples collected during PCMSC field activity 2019-649-FA. Supplemental files include 2019-649-FA_core_locations.csv and 2019-649-FA_core_locations_shapefile.zip.
  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?
    • Availability in digital form:
      Data format: csv table in format comma-delimited text Size: 0.1196
      Network links: https://doi.org/10.5066/P9LBG9H5
      Data format: 2019-649-FA_core_locations_shapefile.zip is a shapefile of vibracore locations in format shapefile Size: 0.003
      Network links: https://doi.org/10.5066/P9690BEK
      Data format: 2019-649-FA_core_locations.csv is a text file containing vibracore locations in format comma-delimited text Size: 0.000935
      Network links: https://doi.org/10.5066/P9690BEK
    • Cost to order the data: None.

  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with Microsoft Excel software.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2021
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P9LBG9H5/2019-649-FA_grainsize_metadata.faq.html>
Generated by mp version 2.9.50 on Thu Oct 14 14:47:20 2021