Grain size, bulk density, and organic carbon of sediment cores from three locations in the Sacramento-San Joaquin Delta, California, 2017 to 2018

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?
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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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  3. How accurate are the heights or depths?
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• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Lacy, Jessica R., and Dailey, Evan T., 20200518, Grain size, bulk density, and organic carbon of sediment cores from three locations in the Sacramento-San Joaquin Delta, California, 2017 to 2018: data release doi:10.5066/P9112AIP, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9112AIP

   This is part of the following larger work.
   Lacy, Jessica R., Joanne C. T. Ferreira, Dailey, Evan T., Dartnell, Peter, Drexler, Judith Z., Allen, Rachel M., and Stevens, Andrew, 2020, Sediment transport and aquatic vegetation data from three locations in the Sacramento-San Joaquin Delta, California, 2017 to 2018: data release doi:10.5066/P9112AIP, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9112AIP

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -121.70921
   East_Bounding_Coordinate: -121.52802
   North_Bounding_Coordinate: 38.24875
   South_Bounding_Coordinate: 37.94611
   

3. What does it look like?

   https://www.sciencebase.gov/catalog/file/get/5ac6a4a3e4b0e2c2dd0e2fd6?name=Delta_GS-BD-C_StudyArea.png&allowOpen=true (PNG)

   Image map showing average values of median grain size (excluding gravel) and ratio of sand, silt, and clay for samples at each sampling location.

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

   Beginning_Date: 04-Apr-2017

   Ending_Date: 19-Mar-2018

   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?

   Delta_GS-BD-C_2017-2018.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.

   Bag I.D.

   Sample bag identifier (Source: Producer defined) Unique identifier for sample bags; assigned in the lab.

   Sample I.D.

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

   Lab I.D.

   Sample identifier for sediment lab, "NA" indicates that no value was assigned. (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:	04/04/2017
   Maximum:	03/19/2018
   Units:	Date in month/day/year format

   Time (PDT)

   Time of sample collection, in hours:minutes:seconds format, Pacific Daylight Time (PDT), "NA" indicates that no value was assigned. (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:	37.94611
   Maximum:	38.248751299999995
   Units:	Decimal degrees

   Longitude

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

   Range of values
   Minimum:	-121.7092103
   Maximum:	-121.52802
   Units:	Decimal degrees

   Sample Type

   Type of sample collected (Source: Producer defined)

   Value	Definition
   Gomex	original sample collected with Gomex box core, then subsequently sub-sampled with a push core
   push core	original sample collected with push core

   Core Depth

   The midpoint of the depth into the sediment bed of the sample, "NA" indicates that no value was calculated. (Source: Producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	48.0
   Units:	centimeters

   Sample Notes

   Free text field with any relevant information regarding the sample (Source: Producer defined) Note of relevant information regarding sample

   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	2.110414
   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:	0.0
   Maximum:	0.628745
   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:	0.0
   Maximum:	1.023236
   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:	0.0
   Maximum:	0.409862
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.007735
   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:	0.0
   Maximum:	0.32309899999999997
   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:	0.0
   Maximum:	0.890969
   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:	0.0
   Maximum:	1.576329
   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:	0.0
   Maximum:	2.477089
   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:	0.0
   Maximum:	4.063209
   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:	0.0
   Maximum:	7.450848
   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:	0.0
   Maximum:	12.336489
   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:	0.0
   Maximum:	19.420317999999998
   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:	0.0
   Maximum:	22.640019
   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:	0.0
   Maximum:	20.308002
   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:	0.0
   Maximum:	13.950220999999999
   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:	0.0
   Maximum:	8.430622999999999
   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:	0.0
   Maximum:	11.03946
   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:	0.0
   Maximum:	15.966745000000001
   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:	7.6e-05
   Maximum:	17.491887
   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:	0.0078
   Maximum:	14.656292
   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:	0.022456999999999998
   Maximum:	9.56809
   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:	0.037999
   Maximum:	5.810875
   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:	0.050998
   Maximum:	3.861762
   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:	0.129996
   Maximum:	3.243146
   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:	0.153673
   Maximum:	3.623395
   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:	0.15804100000000001
   Maximum:	3.899465
   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:	0.151893
   Maximum:	4.390679
   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:	0.133253
   Maximum:	4.730731
   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:	0.112882
   Maximum:	4.910759
   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:	0.100665
   Maximum:	5.1708
   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:	0.10217000000000001
   Maximum:	5.670877
   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:	0.107073
   Maximum:	5.990926
   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:	0.09847
   Maximum:	6.090942
   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:	0.088184
   Maximum:	5.970923
   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:	0.075941
   Maximum:	5.69088
   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:	0.066209
   Maximum:	5.901625
   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:	0.055812
   Maximum:	6.239557
   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:	0.050216000000000004
   Maximum:	6.569534
   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:	0.047667
   Maximum:	6.751927
   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:	0.048478
   Maximum:	6.751927
   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:	0.053112
   Maximum:	6.711916
   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:	0.055726
   Maximum:	6.48185
   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:	0.049072000000000005
   Maximum:	6.121748
   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:	0.043805000000000004
   Maximum:	5.741639
   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:	0.040201
   Maximum:	5.548935
   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:	0.035487
   Maximum:	5.199002
   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:	0.027739
   Maximum:	5.149012
   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:	0.011345000000000001
   Maximum:	4.399156
   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:	0.008091
   Maximum:	3.6293029999999997
   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:	0.005652
   Maximum:	2.5695069999999998
   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:	0.003214
   Maximum:	1.4697200000000001
   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:	0.000743
   Maximum:	0.349933
   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:	0.0
   Maximum:	0.0
   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:	0.0
   Maximum:	0.0
   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:	1.0
   Maximum:	100.0
   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:	0.0
   Maximum:	99.0
   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:	0.0
   Maximum:	4.0
   Units:	Percentage

   D5 Phi

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

   Range of values
   Minimum:	0.319
   Maximum:	5.904
   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:	0.779
   Maximum:	6.59
   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:	0.982
   Maximum:	7.047000000000001
   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:	1.182
   Maximum:	7.537000000000001
   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:	1.5590000000000002
   Maximum:	8.576
   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:	1.9280000000000002
   Maximum:	9.652000000000001
   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:	2.115
   Maximum:	10.074
   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:	2.267
   Maximum:	10.389000000000001
   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:	2.531
   Maximum:	10.709000000000001
   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:	1.559401
   Maximum:	8.57592
   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:	1.551959
   Maximum:	8.565555999999999
   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:	0.44586099999999995
   Maximum:	2.410458
   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:	-0.140713
   Maximum:	0.6412869999999999
   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:	0.8283290000000001
   Maximum:	2.1115310000000003
   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:	1.559401
   Maximum:	8.57592
   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:	1.548237
   Maximum:	8.560374000000001
   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:	0.43783599999999995
   Maximum:	2.555519
   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:	-0.106651
   Maximum:	0.587433
   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:	-0.34614
   Maximum:	1.758637
   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:	0.425037
   Maximum:	2.172312
   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:	0.002621
   Maximum:	0.339292
   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:	0.0033130000000000004
   Maximum:	0.351722
   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:	1.221455
   Maximum:	3.603554
   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:	0.661395
   Maximum:	1.548115
   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:	0.142775
   Maximum:	0.26970700000000003
   Units:	millimeters

   Mean Phi

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

   Range of values
   Minimum:	1.659387
   Maximum:	8.508934
   Units:	Phi size

   Mean mm

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

   Range of values
   Minimum:	0.002745
   Maximum:	0.31657399999999997
   Units:	millimeters

   Variance

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

   Range of values
   Minimum:	0.872085
   Maximum:	5.509818
   Units:	Phi size

   Std. Dev.

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

   Range of values
   Minimum:	0.9338549999999999
   Maximum:	2.3473
   Units:	Phi size

   Skewness

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

   Range of values
   Minimum:	-0.561973
   Maximum:	4.898061
   Units:	Phi size

   Kurtosis

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

   Range of values
   Minimum:	2.134705
   Maximum:	34.275220000000004
   Units:	Phi size

   Mode in Phi 1

   Mode of sample in phi units. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-1.625
   Maximum:	8.377
   Units:	Phi size

   Mode in Phi 2

   Mode of sample in phi units. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-1.125
   Maximum:	8.377
   Units:	Phi size

   Mode in Phi 3

   Mode of sample in phi units. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	-2.125
   Maximum:	10.873
   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:	3.222
   Maximum:	3.313
   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:	5.19
   Maximum:	41.4
   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:	0.094
   Maximum:	19.739
   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:	1.021
   Maximum:	1.9680000000000002
   Units:	grams per cubic centimeter

   Porosity

   The porosity of the sample defined as the nonsolid fraction. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.413
   Maximum:	0.988
   Units:	volume ratio

   Percent Total Carbon

   Total weight percentage of organic carbon for sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.057999999999999996
   Maximum:	11.183
   Units:	percentage

   Percent Total Organic Carbon

   Total weight percentage of total carbon for sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.055999999999999994
   Maximum:	11.171
   Units:	percentage

   Percent Total Inorganic Carbon

   Total weight percentage of inorganic carbon for sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	1.4340000000000002
   Units:	percentage

   Percent CaCO3

   Total weight percentage of calcium carbonate for sample. "NA" indicates that no value was calculated. (Source: producer defined)

   Range of values
   Minimum:	0.0
   Maximum:	11.947000000000001
   Units:	grams per cubic centimeter

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
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
   

   831-460-4747 (voice)

   pcmsc_data@usgs.gov

Why was the data set created?

These data will be used to inform studies of sediment resuspension and transport in areas with increased aquatic vegetation in the Sacramento-San Joaquin Delta. These data are intended for science researchers, students, policy makers, and the general public.

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: Mar-2018 (process 1 of 6)

   Sediment samples were collected from April, 2017 to March, 2018 during three field activities using a push core sampler. Sampling positions were recorded using a hand-held global navigation satellite system (GNSS) receiver.

   Date: Jun-2018 (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. Where used, phi sizes are equal to the negative log base 2 of millimeter size.

   Date: Jun-2018 (process 3 of 6)

   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 with the formula: bulk density = (water density * sediment density) / (water density + (sediment density - water density) * water content), where water density is 1 g/cm3 and sediment density is 2.65 g/cm3.

   Date: 31-Aug-2020 (process 4 of 6)

   Theme Keyword Thesaurus name was corrected from ISO 19115 Topic Categories to ISO 19115 Topic Category. 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 5 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 6 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

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

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?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey (USGS) as the originator of the dataset and in products derived from these data.

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 (Delta_GS-BD-C_2017-2018.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 comma-delimited text (version Microsoft Excel 2016 MSO (16.0.4549.1000) 64-bit) Size: 1.4
     Network links:	https://www.sciencebase.gov/catalog/file/get/5ac6a4a3e4b0e2c2dd0e2fd6 https://www.sciencebase.gov/catalog/item/5ac6a4a3e4b0e2c2dd0e2fd6 https://doi.org/10.5066/P9112AIP

   • 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-Oct-2021

Metadata author:

PCMSC Science Data Coordinator

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

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)