Surface-sediment grain-size distributions of the Elwha River delta, Washington, August 2019

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  7. How does the data set describe geographic features?
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What does this data set describe?

1. How might this data set be cited?
   Stevens, Andrew W., Gelfenbaum, Guy R., Warrick, Jonathan A., Miller, Ian M., and Weiner, Heather M., 2024, Surface-sediment grain-size distributions of the Elwha River delta, Washington, August 2019: data release DOI:10.5066/P9CR1ABQ, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9CR1ABQ
   • https://www.sciencebase.gov/catalog/item/6578f9ced34e952b22747abf

   This is part of the following larger work.
   Stevens, Andrew W., Gelfenbaum, Guy R., Warrick, Jonathan A., Miller, Ian M., and Weiner, Heather M., 2024, Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, August 2019: data release DOI:10.5066/P9CR1ABQ, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

   Online Links:

   • https://doi.org/10.5066/P9CR1ABQ

   Other_Citation_Details:

   Suggested Citation: Stevens, A.W., Gelfenbaum, G.R., Warrick, J.A., Miller, I.M., and Weiner, H.M., 2024, Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington, August 2019: U.S. Geological Survey data release, https://doi.org/10.5066/P9CR1ABQ.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -123.583657
   East_Bounding_Coordinate: -123.419187
   North_Bounding_Coordinate: 48.162311
   South_Bounding_Coordinate: 48.132698
   

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 26-Aug-2019

   Ending_Date: 29-Aug-2019

   Currentness_Reference:

   Ground condition at time data were collected

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

   Geospatial_Data_Presentation_Form: comma-delimited text
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (107)
   2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is WGS1984.
      The ellipsoid used is WGS1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
      
7. How does the data set describe geographic features?

   Attribute Table

   Table containing attribute information associated with the dataset (Source: Producer defined)

   FAN ID

   Unique U.S. Geological Survey field activity identifier (Source: producer defined) Unique identifier for the U.S. Geological Survey field activity

   Sample ID

   Name of sample (Source: producer defined) Unique identifier for the sample used given in the field

   Date Collected

   Date of sample collection in yyyy-mm-dd format (Source: producer defined)

   Range of values
   Minimum:	2019-08-26
   Maximum:	2019-08-29
   Units:	Dates in yyyy-mm-dd format

   Sample Recovered

   Flag to indicate whether sample was recovered (Source: producer defined)

   Value	Definition
   Yes	Sample collection successful at site, sample collected
   No	Sample collection unsuccessful, no sample recovered

   Time

   Time of sample collection in HH:MM:SS format relative to Greenwich Mean Time (GMT) (Source: producer defined)

   Range of values
   Minimum:	00:00:00
   Maximum:	23:59:59
   Units:	Times in HH:MM:SS format

   Latitude

   Latitude of sample in decimal degrees, north (Source: producer defined)

   Range of values
   Minimum:	48.132698
   Maximum:	48.162311
   Units:	decimal degrees

   Longitude

   Longitude of sample in decimal degrees, east (Source: producer defined)

   Range of values
   Minimum:	-123.583657
   Maximum:	-123.419187
   Units:	decimal degrees

   Sample Type

   Type of sample collected (Source: Produce defined)

   Value	Definition
   Surface	Sample collected on land by hand
   Grab	Sample collected with grab sampler from boat

   Wt. percent in -2.00 phi bin or 4 mm bin

   Weight percent of sample with grain diameter between -2.00 and -2.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in -1.00 phi bin or 2 mm bin

   Weight percent of sample with grain diameter between -1.00 and -1.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in -0.75 phi bin or 1.68 mm bin

   Weight percent of sample with grain diameter between -0.75 and -1.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in -0.50 phi bin or 1.41 mm bin

   Weight percent of sample with grain diameter between -0.50 and -0.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in -0.25 phi bin or 1.19 mm bin

   Weight percent of sample with grain diameter between -0.25 and -0.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 0.00 phi bin or 1 mm bin

   Weight percent of sample with grain diameter between 0.00 and -0.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 0.25 phi bin or 0.8409 mm bin

   Weight percent of sample with grain diameter between 0.25 and 0.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 0.50 phi bin or 0.7071 mm bin

   Weight percent of sample with grain diameter between 0.50 and 0.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 0.75 phi bin or 0.5946 mm bin

   Weight percent of sample with grain diameter between 0.75 and 0.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 1.00 phi bin or 0.5 mm bin

   Weight percent of sample with grain diameter between 1.00 and 0.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 1.25 phi bin or 0.4204 mm bin

   Weight percent of sample with grain diameter between 1.25 and 1.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 1.50 phi bin or 0.3536 mm bin

   Weight percent of sample with grain diameter between 1.50 and 1.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 1.75 phi bin or 0.2973 mm bin

   Weight percent of sample with grain diameter between 1.75 and 1.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 2.00 phi bin or 0.25 mm bin

   Weight percent of sample with grain diameter between 2.00 and 1.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 2.25 phi bin or 0.2102 mm bin

   Weight percent of sample with grain diameter between 2.25 and 2.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 2.50 phi bin or 0.1768 mm bin

   Weight percent of sample with grain diameter between 2.50 and 2.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 2.75 phi bin or 0.1487 mm bin

   Weight percent of sample with grain diameter between 2.75 and 2.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 3.00 phi bin or 0.125 mm bin

   Weight percent of sample with grain diameter between 3.00 and 2.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 3.25 phi bin or 0.1051 mm bin

   Weight percent of sample with grain diameter between 3.25 and 3.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 3.50 phi bin or 0.08839 mm bin

   Weight percent of sample with grain diameter between 3.50 and 3.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 3.75 phi bin or 0.07433 mm bin

   Weight percent of sample with grain diameter between 3.75 and 3.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 4.00 phi bin or 0.0625 mm bin

   Weight percent of sample with grain diameter between 4.00 and 3.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 4.25 phi bin or 0.052556 mm bin

   Weight percent of sample with grain diameter between 4.25 and 4.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 4.50 phi bin or 0.044194 mm bin

   Weight percent of sample with grain diameter between 4.50 and 4.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 4.75 phi bin or 0.037163 mm bin

   Weight percent of sample with grain diameter between 4.75 and 4.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 5.00 phi bin or 0.03125 mm bin

   Weight percent of sample with grain diameter between 5.00 and 4.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 5.25 phi bin or 0.02628 mm bin

   Weight percent of sample with grain diameter between 5.25 and 5.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 5.50 phi bin or 0.0221 mm bin

   Weight percent of sample with grain diameter between 5.50 and 5.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 5.75 phi bin or 0.01858 mm bin

   Weight percent of sample with grain diameter between 5.75 and 5.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 6.00 phi bin or 0.01563 mm bin

   Weight percent of sample with grain diameter between 6.00 and 5.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 6.25 phi bin or 0.01314 mm bin

   Weight percent of sample with grain diameter between 6.25 and 6.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 6.50 phi bin or 0.01105 mm bin

   Weight percent of sample with grain diameter between 6.50 and 6.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 6.75 phi bin or 0.00929 mm bin

   Weight percent of sample with grain diameter between 6.75 and 6.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 7.00 phi bin or 0.00781 mm bin

   Weight percent of sample with grain diameter between 7.00 and 6.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 7.25 phi bin or 0.00657 mm bin

   Weight percent of sample with grain diameter between 7.25 and 7.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 7.50 phi bin or 0.00552 mm bin

   Weight percent of sample with grain diameter between 7.50 and 7.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 7.75 phi bin or 0.00465 mm bin

   Weight percent of sample with grain diameter between 7.75 and 7.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 8.00 phi bin or 0.00391 mm bin

   Weight percent of sample with grain diameter between 8.00 and 7.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 8.25 phi bin or 0.00329 mm bin

   Weight percent of sample with grain diameter between 8.25 and 8.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 8.50 phi bin or 0.00276 mm bin

   Weight percent of sample with grain diameter between 8.50 and 8.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 8.75 phi bin or 0.00232 mm bin

   Weight percent of sample with grain diameter between 8.75 and 8.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 9.00 phi bin or 0.00195 mm bin

   Weight percent of sample with grain diameter between 9.00 and 8.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 9.25 phi bin or 0.00164 mm bin

   Weight percent of sample with grain diameter between 9.25 and 9.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 9.50 phi bin or 0.00138mm bin

   Weight percent of sample with grain diameter between 9.50 and 9.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 9.75 phi bin or 0.00116 mm bin

   Weight percent of sample with grain diameter between 9.75 and 9.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 10.00 phi bin or 0.00098 mm bin

   Weight percent of sample with grain diameter between 10.00 and 9.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 10.25 phi bin or 0.00082 mm bin

   Weight percent of sample with grain diameter between 10.25 and 10.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 10.50 phi bin or 0.00069 mm bin

   Weight percent of sample with grain diameter between 10.50 and 10.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 10.75 phi bin or 0.00058 mm bin

   Weight percent of sample with grain diameter between 10.75 and 10.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 11.00 phi bin or 0.00049 mm bin

   Weight percent of sample with grain diameter between 11.00 and 10.75 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 11.25 phi bin or 0.0004 mm bin

   Weight percent of sample with grain diameter between 11.25 and 11.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 11.50 phi bin or 0.00035 mm bin

   Weight percent of sample with grain diameter between 11.50 and 11.25 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 12.00 phi bin or 0.000241 mm bin

   Weight percent of sample with grain diameter between 12.00 and 11.50 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Wt. percent in 13.00 phi bin or 0.00012 mm bin

   Weight percent of sample with grain diameter between 13.00 and 12.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Percent Gravel

   percent of sample greater than 2 mm. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Percent Sand

   percent of sample less than 2 mm and greater than 63 microns. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Percent Silt

   percent of sample less than 63 microns and greater than 4 microns. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Percent Clay

   percent of sample less than 4 microns. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Percent Mud

   percent of sample less than 63 microns. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage

   Gravel to Sand Ratio

   ratio of percent gravel in sample to percent sand. Values of INFINITE indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	144.523
   Units:	dimensionless

   Sand to Silt Ratio

   ratio of percent sand in sample to percent silt. Values of N/A indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	1.884
   Maximum:	308.476
   Units:	dimensionless

   Silt to Clay Ratio

   ratio of percent silt in sample to percent clay. Values of N/A indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	0.136
   Maximum:	5.469
   Units:	dimensionless

   Sand to Clay Ratio

   ratio of percent sand in sample to percent clay. Values of N/A indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	7.239
   Maximum:	591.203
   Units:	dimensionless

   Sand to Mud Ratio

   ratio of percent sand in sample to percent mud. Values of N/A indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	1.495
   Maximum:	202.708
   Units:	dimensionless

   Gravel to Mud Ratio

   ratio of percent gravel in sample to percent mud. Values of INFINITE indicate that the sample contained 100 percent gravel. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	2856.115
   Units:	dimensionless

   D5 Phi

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

   Range of values
   Minimum:	-1.569
   Maximum:	2.33
   Units:	Phi size

   D10 Phi

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

   Range of values
   Minimum:	-1.892
   Maximum:	2.528
   Units:	Phi size

   D16 Phi

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

   Range of values
   Minimum:	-1.977
   Maximum:	2.8
   Units:	Phi size

   D25 Phi

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

   Range of values
   Minimum:	-1.946
   Maximum:	3.053
   Units:	Phi size

   D50 Phi

   Phi size at D50, or average particle diameter by mass, for sample. (Source: producer defined)

   Range of values
   Minimum:	-1.951
   Maximum:	3.653
   Units:	Phi size

   D75 Phi

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

   Range of values
   Minimum:	-1.977
   Maximum:	5.279
   Units:	Phi size

   D84 Phi

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

   Range of values
   Minimum:	-1.887
   Maximum:	6.721
   Units:	Phi size

   D90 Phi

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

   Range of values
   Minimum:	-1.992
   Maximum:	7.663
   Units:	Phi size

   D95 Phi

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

   Range of values
   Minimum:	-1.952
   Maximum:	8.807
   Units:	Phi size

   D5 mm

   mm size at D5 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.0022
   Maximum:	3.8704
   Units:	mm

   D10 mm

   mm size at D10 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.0049
   Maximum:	3.9778
   Units:	mm

   D16 mm

   mm at D16 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.0095
   Maximum:	3.6978
   Units:	mm

   D25 mm

   mm size at D25 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.0258
   Maximum:	3.9372
   Units:	mm

   D50 mm

   mm at D50, or median particle diameter by mass, for sample. (Source: producer defined)

   Range of values
   Minimum:	0.0795
   Maximum:	3.8662
   Units:	mm

   D75 mm

   mm size at D75 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.1205
   Maximum:	3.8525
   Units:	mm

   D84 mm

   mm at D84 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.1436
   Maximum:	3.938
   Units:	mm

   D90 mm

   mm at D90 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.1734
   Maximum:	3.7114
   Units:	mm

   D95 mm

   mm at D95 for sample. (Source: producer defined)

   Range of values
   Minimum:	0.1989
   Maximum:	2.9669
   Units:	mm

   F-W Median Phi

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

   Range of values
   Minimum:	-1.95093
   Maximum:	3.652588
   Units:	Phi size

   F-W Mean Phi

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

   Range of values
   Minimum:	-1.46263
   Maximum:	4.389411
   Units:	Phi size

   F-W Sorting Phi

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

   Range of values
   Minimum:	-0.28297
   Maximum:	2.589973
   Units:	Phi size

   F-W Skewness Phi

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

   Range of values
   Minimum:	-0.62019
   Maximum:	2.396487
   Units:	Phi size

   F-W Kurtosis Phi

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

   Range of values
   Minimum:	-1.37261
   Maximum:	4.104749
   Units:	Phi size

   Inman Median Phi

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

   Range of values
   Minimum:	-1.95093
   Maximum:	3.652588
   Units:	Phi size

   Inman Mean Phi

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

   Range of values
   Minimum:	-1.51062
   Maximum:	4.757822
   Units:	Phi size

   Inman Sorting Phi

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

   Range of values
   Minimum:	-0.37606
   Maximum:	2.491474
   Units:	Phi size

   Inman Skew 16-84 Phi

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

   Range of values
   Minimum:	-0.66576
   Maximum:	3.024152
   Units:	Phi size

   Inman Skew 05-95 Phi

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

   Range of values
   Minimum:	-3.11471
   Maximum:	7.378242
   Units:	Phi size

   Inman Kurtosis Phi

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

   Range of values
   Minimum:	-3.46263
   Maximum:	4.220718
   Units:	Phi size

   Trask Median mm

   mm median for sample by Trask (1930) method. (Source: producer defined)

   Range of values
   Minimum:	0.079517
   Maximum:	3.866245
   Units:	mm

   Trask Mean mm

   Phi size mean for sample by Trask (1930) method. (Source: producer defined)

   Range of values
   Minimum:	0.073129
   Maximum:	3.111123
   Units:	mm

   Trask Sorting mm

   sorting for sample by Trask (1930) method. (Source: producer defined)

   Range of values
   Minimum:	0.761832
   Maximum:	3.9989
   Units:	mm

   Trask Skewness mm

   skewness for sample (D16-D84) by Trask (1930) method. (Source: producer defined)

   Range of values
   Minimum:	0.045899
   Maximum:	6.985931
   Units:	mm

   Trask Kurtosis mm

   skewness for sample (D5-D95) by Trask (1930) method. (Source: producer defined)

   Range of values
   Minimum:	-2.70275
   Maximum:	0.757601
   Units:	mm

   Mean Phi

   moment measure of mean. (Source: producer defined)

   Range of values
   Minimum:	-2.125
   Maximum:	4.309573
   Units:	Phi size

   Mean mm

   moment measure of variance. (Source: producer defined)

   Range of values
   Minimum:	0.05043
   Maximum:	4.362031
   Units:	mm

   Variance Phi

   moment measure of skewness. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	7.567747
   Units:	Phi size

   Std. Dev. Phi

   moment measure of kurtosis. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	2.750954
   Units:	Phi size

   Skewness Phi

   moment measure of skewness. (Source: producer defined)

   Range of values
   Minimum:	-0.88689
   Maximum:	105.395
   Units:	Phi size

   Kurtosis Phi

   moment measure of kurtosis. (Source: producer defined)

   Range of values
   Minimum:	0.00
   Maximum:	11109.1112
   Units:	Phi size

   Entity_and_Attribute_Overview: The first line of the csv file is a header line.
   Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
   

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Andrew W. Stevens
   • Guy R. Gelfenbaum
   • Jonathan A. Warrick
   • Ian M. Miller
   • Heather M. Weiner
2. Who also contributed to the data set?
3. To whom should users address questions about the data?
   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   Attn: PCMSC Science Data Coordinator

   2885 Mission Street

   Santa Cruz, CA
   

   831-427-4747 (voice)

   pcmsc_data@usgs.gov

Why was the data set created?

How was the data set created?

1. From what previous works were the data drawn?
2. How were the data generated, processed, and modified?

   Date: 29-Aug-2019 (process 1 of 2)

   Surface sediment was collected on August 26, 2019 at a total of 77 locations using a small ponar, or 'grab', sampler from the R/V Frontier in water depths between about 1 and 17 m around the delta. An additional 30 samples were collected by hand at low tide between August 27 and August 29, 2019. A hand-held global satellite navigation system (GNSS) receiver was used to determine the locations of sediment samples. Grab samples that yielded less than 50 g of sediment were omitted from analysis.

   Date: 06-Oct-2023 (process 2 of 2)

   The grain-size distributions of suitable 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 2 mm and 63 um sieves 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.

3. What similar or related data should the user be aware of?
   Folk, Robert Louis, and Ward, William C., 1957, Brazos River bar; a study in the significance of grain size parameters.

   Online Links:

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

   Other_Citation_Details:

   Folk, R.L., and Ward, W.C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal of Sedimentary Research, v. 27, n. 1, p. 3-26.

   Inman, Douglas Lamar, 1952, Measures for describing the size distribution of sediments.

   Online Links:

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

   Other_Citation_Details:

   Inman, D.L., 1952, Measures for describing the size distribution of sediments: Journal of Sedimentary Research, v. 22, n. 3, p. 125-145.

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

1. How well have the observations been checked?
   No formal attribute accuracy tests were conducted.
2. How accurate are the geographic locations?
   The locations of samples were determined using a Garmin 78s handheld global satellite navigation systems (GNSS) receiver capable of receiving wide area augmentation system (WAAS) signals. The manufacturer reported accuracy for horizontal positions is 3-5 m while receiving WAAS signals.
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?
   Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
5. How consistent are the relationships among the observations, including topology?
   No formal logical accuracy tests were conducted.

How can someone get a copy of the data set?

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

   U.S. Geological Survey

   Denver Federal Center, Building 810, Mail Stop 302

   Denver, CO
   

   USA

   1-888-275-8747 (voice)

   sciencebase@usgs.gov
2. What's the catalog number I need to order this data set? Surface-sediment grain-size data are available as a comma-delimited text file (ew19_grainsize.csv), along with associated 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:	comma-delimited text file in format comma-delimited text (version MATLAB Version: 9.8.0.1396136 (R2020a)) Size: 0.099
     Network links:	https://www.sciencebase.gov/catalog/file/get/6578f9ced34e952b22747abf?name=ew19_grainsize.csv https://www.sciencebase.gov/catalog/item/6578f9ced34e952b22747abf https://doi.org/10.5066/P9CR1ABQ https://doi.org/10.5066/F72N51GC

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 12-Nov-2024

Metadata author:

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

Attn: PCMSC Science Data Coordinator

2885 Mission Street

Santa Cruz, CA

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

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