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

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
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• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
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• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
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• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Lorenson, Thomas D., Sliter, Ray W., Conrad, James E., Papesh, Antoinette G., 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:

   • https://doi.org/10.5066/P9LBG9H5

   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:

   • https://doi.org/10.5066/P9LBG9H5

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 G. 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?

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 5)

   34 cores were collected on cruise 2019-649-FA with a Rossfelder P-5 vibracorer.

   Date: 02-Nov-2019 (process 2 of 5)

   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 5)

   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 5)

   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

   Date: 16-May-2023 (process 5 of 5)

   Edits were made to correct spelling in author name. No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version. (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?

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: 16-May-2023

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)