Sediment size distributions from San Pablo Bay and China Camp Marsh, California

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?
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• How was the data set created?
  1. From what previous works were the data drawn?
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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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What does this data set describe?

1. How might this data set be cited?
   Lacy, Jessica R, and Dailey, Evan, 2017, Sediment size distributions from San Pablo Bay and China Camp Marsh, California: data release DOI:10.5066/F7HM56MX, U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F7HM56MX
   • https://www.sciencebase.gov/catalog/item/59c45772e4b017cf313bea5f

   This is part of the following larger work.
   Lacy, Jessie R., Allen, Rachel M., Foster-Martinez, Madeline R., Joanne C. T. Ferreira, and O'Neill, Andrea, 2017, Hydrodynamic and sediment transport data from San Pablo Bay and China Camp marsh (northern San Francisco Bay), 2013-2016: data release DOI:10.5066/F7HM56MX, U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F7HM56MX

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -122.493
   East_Bounding_Coordinate: -122.3697
   North_Bounding_Coordinate: 38.0451
   South_Bounding_Coordinate: 38.006
   

3. What does it look like?

   https://www.sciencebase.gov/catalog/file/get/59c45772e4b017cf313bea5f?name=SedimentSizeDistributionLocations.png&allowOpen=true (PNG)

   image showing locations of sampling

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 03-Dec-2013

   Ending_Date: 21-Jun-2016

   Currentness_Reference:

   dates of observations

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: Comma-separated values spreadsheet (CSV)
   

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.
   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 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is World Geodetic System 1984 (WGS84).
      The ellipsoid used is WGS84.
      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)

   FACS/FAN I.D.

   Unique U.S. Geological Survey field activity identifier. (Source: Producer defined) Unique U.S. Geological Survey field activity identifier.

   Sample I.D.

   Sample identifier (Source: Producer defined) Unique identifier for samples; assigned in the field.

   Station

   Unique identifier of sampling locations. (Source: Producer defined) Unique identifier of sampling locations.

   Date Collected

   Date in month/day/year format of sample collection. (Source: Producer defined)

   Range of values
   Minimum:	12/03/2013
   Maximum:	06/21/2016

   Time (PDT)

   Time of sample collection, in hours:minutes:seconds format, Pacific Daylight Time (PDT). (Source: Producer defined) Time of sample collection, in hours:minutes:seconds format, Pacific Daylight Time (PDT), or tide conditions during collection.

   Latitude

   Latitude of sample location in decimal degrees, north. (Source: Producer defined)

   Range of values
   Minimum:	38.00879
   Maximum:	38.07641
   Units:	Decimal degrees

   Longitude

   Longitude of sample location in decimal degrees, east. (Source: Producer defined)

   Range of values
   Minimum:	-122.49300
   Maximum:	-122.37660
   Units:	Decimal degrees

   Sample Type

   Type of sample collected (Source: Producer defined)

   Value	Definition
   Grab	Sample collected with ponar grab equipment

   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 -2.00 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 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/Sand

   Ratio of gravel to sand in sample. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	0.156

   Sand/Silt

   Ratio of sand to silt in sample. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	151.213

   Silt/Clay

   Ratio of silt to clay in sample. (Source: Producer defined)

   Range of values
   Minimum:	1.046
   Maximum:	2.45

   Sand/Clay

   Ratio of sand to clay in sample. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	370.456

   Sand/Mud

   Ratio of sand to mud in sample. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	107.382

   Gravel/Mud

   Ratio of gravel to mud in sample. (Source: Producer defined)

   Range of values
   Minimum:	0
   Maximum:	0.367

   D5 Phi

   Phi size at D5 for sample. (Source: Producer defined)

   Range of values
   Minimum:	0.629
   Maximum:	5.064
   Units:	Phi size

   D10 Phi

   Phi size at D10 for sample. (Source: Producer defined)

   Range of values
   Minimum:	0.852
   Maximum:	6.159
   Units:	Phi size

   D16 Phi

   Phi size at D16 for sample. (Source: Producer defined)

   Range of values
   Minimum:	1.020
   Maximum:	6.514
   Units:	Phi size

   D25 Phi

   Phi size at D25 for sample. (Source: Producer defined)

   Range of values
   Minimum:	1.223
   Maximum:	6.934
   Units:	Phi size

   D50 Phi

   Phi size at D50 for sample. (Source: Producer defined)

   Range of values
   Minimum:	1.673
   Maximum:	7.951
   Units:	Phi size

   D75 Phi

   Phi size at D75 for sample. (Source: Producer defined)

   Range of values
   Minimum:	1.977
   Maximum:	9.156
   Units:	Phi size

   D84 Phi

   Phi size at D84 for sample. (Source: Producer defined)

   Range of values
   Minimum:	2.132
   Maximum:	9.696
   Units:	Phi size

   D90 Phi

   Phi size at D90 for sample. (Source: Producer defined)

   Range of values
   Minimum:	2.244
   Maximum:	10.105
   Units:	Phi size

   D95 Phi

   Phi size at D95 for sample. (Source: Producer defined)

   Range of values
   Minimum:	2.436
   Maximum:	10.513
   Units:	Phi size

   F-W Median

   Phi size median for sample by Folk and Ward (1957) method. (Source: producer defined)

   Range of values
   Minimum:	-3
   Maximum:	5.90
   Units:	Phi size

   F-W Mean

   Phi size mean for sample by Folk and Ward (1957) method. (Source: producer defined)

   Range of values
   Minimum:	-3
   Maximum:	5.95
   Units:	Phi size

   F-W Sorting

   sorting for sample by Folk and Ward (1957) method. (Source: producer defined)

   Range of values
   Minimum:	0.60
   Maximum:	2.47
   Units:	Phi size

   F-W Skewness

   skewness for sample by Folk and Ward (1957) method. (Source: producer defined)

   Range of values
   Minimum:	-0.35
   Maximum:	0.63
   Units:	Phi size

   F-W Kurtosis

   Kurtosis for sample by Folk and Ward (1957) method. (Source: producer defined)

   Range of values
   Minimum:	0.61
   Maximum:	2.92
   Units:	Phi size

   Inman Median

   Phi size median for sample by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-3
   Maximum:	5.90
   Units:	Phi size

   Inman Mean

   Phi size mean for sample by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-3
   Maximum:	5.97
   Units:	Phi size

   Inman Sorting

   sorting for sample by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	0.59
   Maximum:	2.45
   Units:	Phi size

   Inman Skew 16-84

   skewness for sample (D16-D84) by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-0.28
   Maximum:	0.60
   Units:	Phi size

   Inman Skew 05-95

   skewness for sample (D5-D95) by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-1.37
   Maximum:	2.94
   Units:	Phi size

   Inman Kurtosis

   Kurtosis for sample by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	0.13
   Maximum:	3.55
   Units:	Phi size

   Trask Median

   mm size median for sample by Trask (XXXX) method in mm. (Source: producer defined)

   Range of values
   Minimum:	0.00404
   Maximum:	0.31364
   Units:	millimeters

   Trask Mean

   mm size mean for sample by Trask (XXXX) method in mm. (Source: producer defined)

   Range of values
   Minimum:	0.004967
   Maximum:	0.322061
   Units:	millimeters

   Trask Sorting

   sorting for sample by Trask (XXXX) method in mm. (Source: producer defined)

   Range of values
   Minimum:	1.215510
   Maximum:	5.837522
   Units:	millimeters

   Trask Skewness

   skewness for sample by Trask (XXXX) method in mm. (Source: producer defined)

   Range of values
   Minimum:	0.197919
   Maximum:	1.258160
   Units:	millimeters

   Trask Kurtosis

   kurtosis for sample by Trask (XXXX) method in mm. (Source: producer defined)

   Range of values
   Minimum:	0.150862
   Maximum:	0.353145
   Units:	millimeters

   Mean Phi

   phi size mean for sample. (Source: producer defined)

   Range of values
   Minimum:	0.680507
   Maximum:	8.023167
   Units:	Phi size

   Mean mm

   mm size mean for sample. (Source: producer defined)

   Range of values
   Minimum:	0.003844
   Maximum:	0.311973
   Units:	millimeters

   Variance

   variance for sample. (Source: producer defined)

   Range of values
   Minimum:	0.579939
   Maximum:	8.223348
   Units:	Phi size

   Std. Dev.

   standard deviation for sample. (Source: producer defined)

   Range of values
   Minimum:	0.761537
   Maximum:	2.867638
   Units:	Phi size

   Skewness

   skewness for sample. (Source: producer defined)

   Range of values
   Minimum:	-0.583652
   Maximum:	4.317912
   Units:	Phi size

   Kurtosis

   kurtosis for sample. (Source: producer defined)

   Range of values
   Minimum:	1.840681
   Maximum:	40.189793
   Units:	Phi size

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Jessica R Lacy
   • Evan Dailey
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: 21-Jun-2016 (process 1 of 6)

   Surface sediment was collected on 19 days between December 3, 2013 and June 21, 2016 using a small ponar, or 'grab', sampler from the R/V Parke Snavely. Some sediment samples were collected from sediment that accumulated on instruments. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples.

   Date: 12-Oct-2016 (process 2 of 6)

   The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was sub-sampled and 10 mL of 35 percent hydrogen peroxide was added to remove organic material in the sample. The sample was heated at 250 degrees C to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the fine fraction. Subsequently, the sample was centrifuged for 1.5 hours to remove soluble salts. Samples were funneled through a 2 mm and a 63 um sieve to separate the gravel (greater than 2 mm), sand (63 um to 2 mm), and mud (less than 63 um). The sand and gravel fractions were dried in an 80 degree C oven and weighed. Five mL of sodium hexametaphosphate was added to the mud fraction and a 20 mL aliquot was taken from a 1 L graduated cylinder to determine the weight of the mud. The particle-size distribution of the mud and sand fractions was analyzed separately using a Beckman Coulter LS 13 320, and the gravel, sand, and mud results were integrated into a single grain-size distribution for each sample.

   Date: 25-Nov-2019 (process 3 of 6)

   Extraneous text was removed from Semi-Major Axis tag. Person who carried out this activity:
   

   Susan A. Cochran

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission St.

   Santa Cruz, CA
   

   USA

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 19-Oct-2020 (process 4 of 6)

   Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 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

   Date: 13-Oct-2021 (process 5 of 6)

   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: 13-Jul-2023 (process 6 of 6)

   Entity and Attribute section was edited for clarity. No data were changed. (rtakesue@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?
   No formal attribute accuracy tests were conducted
2. How accurate are the geographic locations?
   Horizontal accuracy derived from GPS instrumentation is less than 1 m.
3. How accurate are the heights or depths?
   Vertical accuracy derived from GPS instrumentation is less than 0.05 m.
4. Where are the gaps in the data? What is missing?
   Data set 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?
   No formal logical accuracy tests were conducted. Data fall within expected ranges.

How can someone get a copy of the data set?

1. Who distributes the data set? (Distributor 1 of 1)
   
   U.S. Geological Survey - Science Base

   U.S. Geological Survey

   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? Downloadable sediment size distribution data in csv (comma-delimited spreadsheet) file format.
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:	Comma-separated values text file in format Comma-separated values (version Microsoft Excel version 14.0.7188.5002) CSV Size: 0.07
     Network links:	https://www.sciencebase.gov/catalog/item/59c45772e4b017cf313bea5f?name=SedimentSizeDistributionsSanPabloBayChinaCampMarsh.csv

   • Cost to order the data: None

   • Availability in digital form:

     Data format:	PNG shows measurement locations in format png (version ArcGIS 10.4) Size: 0.2
     Network links:	https://www.sciencebase.gov/catalog/file/get/59c45772e4b017cf313bea5f?name=SedimentSizeDistributionLocations.png

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?
   The data is available in comma-separated values (CSV) spreadsheet format. Text editing software can be used to open the file, as well as spreadsheet programs, such as Microsoft Excel.

Who wrote the metadata?

Dates:

Last modified: 13-Jul-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)