Grain size and bulk density of sediment cores from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 (ver. 2.0, March 2025)

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• 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?
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  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, Dailey, Evan T, and Carlson, Emily M, 2018, Grain size and bulk density of sediment cores from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 (ver. 2.0, March 2025): data release doi:10.5066/F7V1241K, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F7V1241K

   This is part of the following larger work.
   Lacy, Jessica R, Dailey, Evan T, and Carlson, Emily M, 2018, Bed sediment properties in Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 to 2019 (ver. 4.0, March 2025): data release doi:10.5066/F7V1241K, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F7V1241K

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -121.67414
   East_Bounding_Coordinate: -121.6543
   North_Bounding_Coordinate: 38.32258
   South_Bounding_Coordinate: 38.26698
   

3. What does it look like?

   https://www.sciencebase.gov/catalog/file/get/5a73a58fe4b0a9a2e9e172cf?name=LHT-LI_SampleMeans_2014_Depths.png&allowOpen=true (PNG)

   Image map showing average values of median grain size (excluding gravel) and ratio of sand, silt, and clay for samples 0 to 2 cm deep (left) and 4 to 5 cm deep (right) at each sampling location.

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

   Beginning_Date: 25-Aug-2014

   Ending_Date: 26-Aug-2014

   Currentness_Reference:

   ground condition

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

   Geospatial_Data_Presentation_Form: Comma-separated values
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      

      Indirect_Spatial_Reference:

      Data were collected in the Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California

      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 1.0E-5. Longitudes are given to the nearest 1.0E-5. 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?

   GrainsizeBD_LHT-LI_2014Cores.csv

   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.

   Lab I.D.

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

   Date Collected

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

   Range of values
   Minimum:	08/25/2014
   Maximum:	08/26/2014
   Units:	Date in month/day/year format

   Time (PDT)

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

   Range of values
   Minimum:	00:00:00
   Maximum:	23:59:59
   Units:	hours:minutes:seconds format, Pacific Daylight Time (PDT)

   Site

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

   Latitude

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

   Range of values
   Minimum:	38.26698
   Maximum:	38.32258
   Units:	Decimal degrees

   Longitude

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

   Range of values
   Minimum:	-121.67414
   Maximum:	-121.6543
   Units:	Decimal degrees

   Sample Type

   Type of sample collected (Source: Producer defined)

   Value	Definition
   section of push core	Sample collected with push core

   Core Depth

   The midpoint of the depth into the sediment bed of the sample (Source: producer defined)

   Range of values
   Minimum:	0.5
   Maximum:	17.0
   Units:	centimeters

   Thickness

   The thickness (starting depth to the ending depth) of the sediment core sampled (Source: producer defined)

   Range of values
   Minimum:	1
   Maximum:	2
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.79
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.73
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.74
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.24
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.07
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.99
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.91
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.34
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.37
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.38
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.40
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.43
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.55
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	1.81
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	2.03
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.22
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	2.92
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	4.14
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	6.80
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	10.59
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	12.69
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	11.92
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	8.91
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.03
   Maximum:	5.53
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.02
   Maximum:	3.02
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	3.22
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	3.47
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	3.22
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.80
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.07
   Maximum:	2.63
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.39
   Maximum:	2.74
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.68
   Maximum:	2.94
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.62
   Maximum:	3.00
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.49
   Maximum:	3.11
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.77
   Maximum:	3.30
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.09
   Maximum:	3.55
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.19
   Maximum:	3.71
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.28
   Maximum:	4.32
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.36
   Maximum:	4.96
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.42
   Maximum:	5.46
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.48
   Maximum:	5.89
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.48
   Maximum:	6.39
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.49
   Maximum:	6.99
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.46
   Maximum:	7.30
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.36
   Maximum:	7.15
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.28
   Maximum:	6.98
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.19
   Maximum:	6.62
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.09
   Maximum:	6.12
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.98
   Maximum:	5.62
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.89
   Maximum:	5.19
   Units:	percentage

   Wt. percent in 10.00 phi bin or 0.00098 mm bin

   Weight percent of sample with grain diameter between 9.75 and 10.00 phi, or 0.00098 and 0.00116 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.75
   Maximum:	4.49
   Units:	percentage

   Wt. percent in 10.25 phi bin or 0.00082 mm bin

   Weight percent of sample with grain diameter between 10.00 and 10.25 phi, or 0.00082 and 0.00098 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.67
   Maximum:	4.11
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.52
   Maximum:	3.30
   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, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.39
   Maximum:	2.61
   Units:	percentage

   Wt. percent in 11.00 phi bin or 0.00049 mm bin

   Weight percent of sample with grain diameter between 10.75 and 11.00 phi, or 0.00049 and 0.00058 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	1.79
   Units:	percentage

   Wt. percent in 11.25 phi bin or 0.0004 mm bin

   Weight percent of sample with grain diameter between 11.00 and 11.25 phi, or 0.0004 and 0.00049 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.14
   Maximum:	1.01
   Units:	percentage

   Wt. percent in 11.50 phi bin or 0.00035 mm bin

   Weight percent of sample with grain diameter between 11.25 and 11.50 phi, or 0.00035 and 0.0004 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.03
   Maximum:	0.23
   Units:	percentage

   Wt. percent in 12.00 phi bin or 0.000241 mm bin

   Weight percent of sample with grain diameter between 11.50 and 12.00 phi, or 0.000241 and 0.00035 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   Units:	percentage

   Wt. percent in 13.00 phi bin or 0.00012 mm bin

   Weight percent of sample with grain diameter between 12.00 and 13.00 phi, or 0.00012 and 0.000241 mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.00
   Units:	percentage

   Percent Gravel

   Percent of sample greater than 2 mm, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	4.55
   Units:	Percentage

   Percent Sand

   Percent of sample less than 2 mm and greater than 63 microns, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.31
   Maximum:	69.88
   Units:	Percentage

   Percent Silt

   Percent of sample less than 63 microns and greater than 4 microns, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	17.91
   Maximum:	51.96
   Units:	Percentage

   Percent Clay

   Percent of sample less than 4 microns, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	11.01
   Maximum:	60.91
   Units:	Percentage

   Percent Mud

   Percent of sample less than 63 microns, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	28.92
   Maximum:	99.69
   Units:	Percentage

   Gravel/Sand

   Ratio of gravel to sand in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.88

   Sand/Silt

   Ratio of sand to silt in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	3.90

   Silt/Clay

   Ratio of silt to clay in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.60
   Maximum:	2.13

   Sand/Clay

   Ratio of sand to clay in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	6.35

   Sand/Mud

   Ratio of sand to mud in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.42

   Gravel/Mud

   Ratio of gravel to mud in sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.07

   D5 Phi

   Phi size at D5 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	-0.85
   Maximum:	6.13
   Units:	Phi size

   D10 Phi

   Phi size at D10 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.35
   Maximum:	6.66
   Units:	Phi size

   D16 Phi

   Phi size at D16 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	1.25
   Maximum:	7.05
   Units:	Phi size

   D25 Phi

   Phi size at D25 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	2.03
   Maximum:	7.47
   Units:	Phi size

   D50 Phi

   Phi size at D50 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	2.73
   Maximum:	8.40
   Units:	Phi size

   D75 Phi

   Phi size at D75 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	5.16
   Maximum:	9.39
   Units:	Phi size

   D84 Phi

   Phi size at D84 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	7.16
   Maximum:	9.83
   Units:	Phi size

   D90 Phi

   Phi size at D90 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	8.18
   Maximum:	10.19
   Units:	Phi size

   D95 Phi

   Phi size at D95 for sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	9.17
   Maximum:	10.56
   Units:	Phi size

   F-W Median

   Phi size median for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	2.73
   Maximum:	8.40
   Units:	Phi size

   F-W Mean

   Phi size mean for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	3.96
   Maximum:	8.40
   Units:	Phi size

   F-W Sorting

   sorting for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.34
   Maximum:	3.55
   Units:	Phi size

   F-W Skewness

   skewness for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-0.41
   Maximum:	0.69
   Units:	Phi size

   F-W Kurtosis

   Kurtosis for sample by Folk and Ward (1957) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.61
   Maximum:	1.47
   Units:	Phi size

   Inman Median

   Phi size median for sample by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	2.73
   Maximum:	8.40
   Units:	Phi size

   Inman Mean

   Phi size mean for sample by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	4.57
   Maximum:	8.40
   Units:	Phi size

   Inman Sorting

   sorting for sample by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.35
   Maximum:	3.80
   Units:	Phi size

   Inman Skew 16-84

   skewness for sample (D16-D84) by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-0.41
   Maximum:	0.72
   Units:	Phi size

   Inman Skew 05-95

   skewness for sample (D5-D95) by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-1.02
   Maximum:	0.99
   Units:	Phi size

   Inman Kurtosis

   Kurtosis for sample by Inman (1952) method, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.26
   Maximum:	1.40
   Units:	Phi size

   Trask Median

   mm size median for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.15
   Units:	millimeters

   Trask Mean

   mm size mean for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.13
   Units:	millimeters

   Trask Sorting

   sorting for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.90
   Maximum:	7.71
   Units:	millimeters

   Trask Skewness

   skewness for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.10
   Maximum:	6.11
   Units:	millimeters

   Trask Kurtosis

   kurtosis for sample by Trask (1930) method in mm, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.04
   Maximum:	0.35
   Units:	millimeters

   Mean Phi

   phi size mean for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	3.80
   Maximum:	8.34
   Units:	Phi size

   Mean mm

   mm size mean for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	0.07
   Units:	millimeters

   Variance

   variance for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.91
   Maximum:	12.19
   Units:	Phi size

   Std. Dev.

   standard deviation for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.38
   Maximum:	3.49
   Units:	Phi size

   Skewness

   skewness for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-2.10
   Maximum:	1.03
   Units:	Phi size

   Kurtosis

   kurtosis for sample, "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.51
   Maximum:	8.85
   Units:	Phi size

   Mode in Phi

   Mode or modes of sample in phi units. If sample was multi-modal, multiple mode values reported, separated by semicolon. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-2.38
   Maximum:	8.38
   Units:	Phi size

   Bag Weight

   The weight of the empty sample bag. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	3.24
   Maximum:	3.88
   Units:	grams

   Bag and Wet Sediment Weight

   The weight of the initial wet sample, as it was collected in the sample bag. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	17.99
   Maximum:	46.16
   Units:	grams

   Dry Sediment Weight

   The weight of the dried sediment in the sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	6.92
   Maximum:	31.31
   Units:	grams

   Bulk Density

   The bulk density of the sample, calculated as the mass of the dry sediment divided by the volume of the initial sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	1.39
   Maximum:	1.85
   Units:	grams per cubic centimeter

   Percent_Total_Carbon

   total weight percentage of carbon, NA indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.98
   Maximum:	2.20
   Units:	percentage

   Percent_Total_Organic_Carbon

   total weight percentage of organic carbon, NA indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.92
   Maximum:	2.18
   Units:	percentage

   Percent_Total_Inorganic_Carbon

   total weight percentage of inorganic carbon, NA indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.01
   Maximum:	0.06
   Units:	percentage

   Percent_Calcium_Carbonate

   weight percentage of calcium carbonate, NA indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.07
   Maximum:	0.47
   Units:	percentage

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 T Dailey
   • Emily M Carlson
2. Who also contributed to the data set?
   Data collection was funded by U.S. Geological Survey and U.S. Bureau of Reclamation
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
   

   United States

   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: Aug-2014 (process 1 of 9)

   Sediment samples were collected on August 25 and 26, 2014 using a push core sampler. Sampling positions were recorded using a hand-held global navigation satellite system (GNSS) receiver.

   Date: Sep-2014 (process 2 of 9)

   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. Where used, phi sizes are equal to the negative log base 2 of millimeter size.

   Date: Sep-2014 (process 3 of 9)

   Bulk density was calculated by weighing the sample bag, the wet sample in the bag, and the dry sample in the bag. Measurements were made in the USGS Pacific Coastal and Marine Science Center sediment lab. The bulk density reported here was calculated as: water density (1 g/cm3) times sediment density (2.65 g/cm3) divided by water density plus the product of sediment density minus sediment density and water content of the sample.

   Date: 17-Jul-2018 (process 4 of 9)

   Corrected name of theme keyword thesaurus from ISO 19115 Topic Categories to Category. Updated contact information to bring up to USGS PCMSC standards. 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
   

   United States

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 05-Sep-2018 (process 5 of 9)

   Corrected Point of Contact and Metadata Contact phone number prefix. No data were changed. 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
   

   United States

   831-460-7545 (voice)

   scochran@usgs.gov

   Date: 19-Oct-2020 (process 6 of 9)

   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 7 of 9)

   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: 23-Aug-2023 (process 8 of 9)

   CARBON ANALYSIS: A total of 5 samples were analyzed for percent carbon. Carbon analysis was performed by the PCMSC carbon lab employing a coulometric titration technique described in Engleman and others (1985) and UIC operating manuals for the UIC CM5200 autosampler furnace, the UIC CM5230 acidification module, and the UIC CM5017 coulometer. Total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC) and percent calcium carbonate (CaCO3) are reported as percent dry weight. Approximately 5 grams of sediment were dried in an 80 degrees Celsius oven. Samples were then pulverized, redried, and placed in a desiccator. For TC analysis, approximately 20 milligrams of the pulverized sample were weighed and wrapped in an aluminum capsule then combusted at 950 degrees Celsius in an UIC CM5200 autosampler furnace attached to an UIC CM5017 coulometer. The carbon dioxide (CO2) produced by combusting the sample was then converted to TC by the UIC CM5017 coulometer. For TIC, approximately 20 milligrams of sample were weighed and loaded into an UIC CM5230 acidification module attached to an UIC CM5017 coulometer. The samples were then digested in a perchloric acid solution, and the CO2 generated was measured and converted to TIC. Two analyses per sample were run and the results were averaged. TOC was calculated by subtracting TIC from TC. The TIC value was then multiplied by 8.333 (the molar stochiometric ratio of CaCO3 to C) to convert TIC to percent CaCO3.

   Date: 2024 (process 9 of 9)

   Added percent carbon data to the end of the data table. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: Samantha McGill

   Oceanographer

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7543 (voice)

   scmcgill@usgs.gov

3. What similar or related data should the user be aware of?
   Lacy, Jessica R, and Carlson, Emily M, 2016, Wind-wave and suspended-sediment data from Liberty Island and Little Holland Tract, Sacramento-San Joaquin Delta, California: data release doi:10.5066/F73R0R07, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F73R0R07

   Snyder, Alex G, Stevens, Andrew W, Carlson, Emily M, and Lacy, Jessica R, 2016, Digital elevation model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015: data release doi:10.5066/F7RX9954, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • http://dx.doi.org/10.5066/F7RX9954

   Folk, Robert Louis, and Ward, William C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal article Journal of Sedimentary Research, v. 27, n. 1, p. 3-26, SEPM Society for Sedimentary Geology, Boulder, CO.

   Online Links:

   • https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D

   Inman, Douglas Lamar, 1952, Measures for describing the size distribution of sediments: Journal article Journal of Sedimentary Research, v. 22, n. 3, p. 125-145, SEPM Society for Sedimentary Geology, Boulder, CO.

   Online Links:

   • https://doi.org/10.1306/D42694DB-2B26-11D7-8648000102C1865D

   Trask, Parker D., 1930, Mechanical analyses of sediments by centrifuge: Journal article Economic Geology, v. 26, n. 6, p. 581-599, Society of Economic Geologists (SEG), Littleton, CO.

   Online Links:

   • https://doi.org/10.2113/gsecongeo.25.6.581

   Inc., UIC, 2022, Operation Manual Model CM5017 CO2 Coulometer.

   Other_Citation_Details:

   UIC Inc., Operation Manual Model CM5017 CO2 Coulometer, Joliet, IL, 2.0, p. 28-30.

   Inc., UIC, 2022, Operation Manual Model CM5200 Autosampler Furnace.

   Other_Citation_Details:

   UIC Inc., Operation Manual Model CM5200 Autosampler Furnace, Joliet, IL, 2.4, 13 p.

   Inc., UIC, 2022, Operation Manual Model CM5230 Acidification Module.

   Other_Citation_Details:

   UIC Inc., Operation Manual Model CM5230 Acidification Module, Joliet, IL, 2.1, p. 15-17.

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

1. How well have the observations been checked?
   Data values are within the expected values.
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?
   No formal positional accuracy tests were conducted
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?
   Data values are within the expected values.

How can someone get a copy of the data set?

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

   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? These data are available in csv format (GrainSizeBDCarbon_LHT-LI_2014Cores.csv) along with CSDGM FGDC-compliant metadata.
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:	zip file contains the csv table, associated metadata, and an image map of the study area showing sample locations, grain size summaries, and elevation model in format csv (version Microsoft Excel 2016 MSO (16.0.4549.1000) 64-bit) Size: 0.07246
     Network links:	https://www.sciencebase.gov/catalog/file/get/5a73a58fe4b0a9a2e9e172cf https://www.sciencebase.gov/catalog/item/5a73a58fe4b0a9a2e9e172cf https://doi.org/10.5066/F7V1241K

   • 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: 19-Mar-2025

Metadata author:

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

Attn: PCMSC Science Data Coordinator

2885 Mission Street

Santa Cruz, CA

United States

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)