Sediment grain size in the Elwha River estuary, Washington, from 2013 and 2014.

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• 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?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Foley, Melissa M., 2017, Sediment grain size in the Elwha River estuary, Washington, from 2013 and 2014.: data release DOI:10.5066/F75B00N4, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/F75B00N4
   • https://www.sciencebase.gov/catalog/file/get/58f51816e4b0f6ac3c40393b

   This is part of the following larger work.
   Foley, Melissa M., Shafroth, Patrick B., Beirne, Matthew M., Paradis, Rebecca, and Ritchie, Andrew C., 2017, Ecological parameters in the Elwha River estuary before and during dam removal: data release DOI:10.5066/F75B00N4, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

   Online Links:

   • https://doi.org/10.5066/F75B00N4

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -123.56768
   East_Bounding_Coordinate: -123.56135
   North_Bounding_Coordinate: 48.14790
   South_Bounding_Coordinate: 48.13583
   

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

   Beginning_Date: 01-Jul-2013

   Ending_Date: 10-Jun-2014

   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 (28)
   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 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
      
7. How does the data set describe geographic features?

   Grain-size

   Tabular data (Source: Producer defined)

   Field Activity Number

   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 given when collected in the field

   Latitude (deg. N)

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

   Range of values
   Minimum:	48.13583
   Maximum:	48.14790
   Units:	decimal degrees

   Longitude (deg. E)

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

   Range of values
   Minimum:	-123.56135
   Maximum:	-123.56768
   Units:	decimal degrees

   Date Collected

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

   Range of values
   Minimum:	07/01/2013
   Maximum:	06/10/2014
   Units:	Dates in mm/dd/yyyy format

   Time (GMT)

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

   Range of values
   Minimum:	15:35
   Maximum:	20:10
   Units:	Times in HH:SS format

   Core section

   Section of core analyzed (Source: producer defined)

   Range of values
   Minimum:	0-1
   Maximum:	42-44
   Units:	centimeters from the top of the core

   Sample Type

   Type of sample collected (Source: producer defined)

   Value	Definition
   Push core	Sample collected with push core

   Lab ID

   Samples collected in 2013 are identified at FFFFFFF_XX, where FFFFFFF is the 7-digis field activity number (FAN) ID code, and XX is a sequential number given to the sample in the lab. Samples collected in 2014 are identified as PP-YY-FFFFF-XX, where PP is the 2-digit year the sample was analyzed (for example 16=2016), YY is the 2-digit year the sample was collected, FFFFF is the last 5-digits of the field activity number ID code, and XX is a sequential number given to the sample in the lab. (Source: Producer defined) Unique identifier for the sample given during analysis in the lab

   Wt. percent in -2.00 phi bin

   Weight percent of sample with grain diameter greater than -2.00. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in -1.00 phi bin

   Weight percent of sample with grain diameter between -2.00 and -1.00 phi. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in -0.75 phi 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
   Resolution:	1.0E-6

   Wt. percent in -0.50 phi 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
   Resolution:	1.0E-6

   Wt. percent in -0.25 phi 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
   Resolution:	1.0E-6

   Wt. percent in 0.00 phi 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
   Resolution:	1.0E-6

   Wt. percent in 0.25 phi 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
   Resolution:	1.0E-6

   Wt. percent in 0.50 phi 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
   Resolution:	1.0E-6

   Wt. percent in 0.75 phi 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
   Resolution:	1.0E-6

   Wt. percent in 1.00 phi 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
   Resolution:	1.0E-6

   Wt. percent in 1.25 phi 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
   Resolution:	1.0E-6

   Wt. percent in 1.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 1.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 2.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 2.25 phi 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
   Resolution:	1.0E-6

   Wt. percent in 2.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 2.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 3.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 3.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 3.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 3.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 4.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 4.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 4.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 4.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 5.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 5.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 5.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 5.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 6.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 6.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 6.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 6.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 7.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 7.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 7.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 7.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 8.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 8.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 8.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 8.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 9.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 9.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 9.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 9.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 10.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 10.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 10.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 10.75 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 11.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 11.25 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 11.50 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 12.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Wt. percent in 13.00 phi bin

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Percent Gravel

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   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
   Resolution:	1.0E-6

   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
   Resolution:	1.0E-6

   Percent Clay

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   Percent Mud

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

   Range of values
   Minimum:	0
   Maximum:	100
   Units:	percentage
   Resolution:	1.0E-6

   D5 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D10 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D16 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D25 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D50 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D75 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D84 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D90 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   D95 Phi

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

   Range of values
   Minimum:	-4
   Maximum:	13
   Units:	Phi size
   Resolution:	1.0E-3

   F-W Median

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

   Range of values
   Minimum:	3.235832
   Maximum:	7.202429
   Units:	Phi size
   Resolution:	1.0E-6

   F-W Mean

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

   Range of values
   Minimum:	3.899815
   Maximum:	7.352718
   Units:	Phi size
   Resolution:	1.0E-6

   F-W Sorting

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

   Range of values
   Minimum:	1.270643
   Maximum:	2.467434
   Units:	Phi size
   Resolution:	1.0E-6

   F-W Skewness

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

   Range of values
   Minimum:	-0.296635
   Maximum:	0.581995
   Units:	Phi size
   Resolution:	1.0E-6

   F-W Kurtosis

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

   Range of values
   Minimum:	0.887895
   Maximum:	1.603556
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Median

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

   Range of values
   Minimum:	3.23832
   Maximum:	7.202429
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Mean

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

   Range of values
   Minimum:	4.231806
   Maximum:	7.427862
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Sorting

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

   Range of values
   Minimum:	1.214712
   Maximum:	2.41976
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Skew 16-84

   Skewness for sample (D16-84) by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-0.217451
   Maximum:	0.56562
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Skewness 05-95

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

   Range of values
   Minimum:	-0.823404
   Maximum:	1.065633
   Units:	Phi size
   Resolution:	1.0E-6

   Inman Kurtosis

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

   Range of values
   Minimum:	0.561406
   Maximum:	1.190959
   Units:	Phi size
   Resolution:	1.0E-6

   Trask Median

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

   Range of values
   Minimum:	0.00679
   Maximum:	0.106149
   Units:	Phi size
   Resolution:	1.0E-6

   Trask Mean

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

   Range of values
   Minimum:	0.007343
   Maximum:	0.099793
   Units:	Phi size
   Resolution:	1.0E-6

   Trask Sorting

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

   Range of values
   Minimum:	1.734801
   Maximum:	3.243552
   Units:	Phi size
   Resolution:	1.0E-6

   Trask Skewness

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

   Range of values
   Minimum:	0.499144
   Maximum:	1.274804
   Units:	Phi size
   Resolution:	1.0E-6

   Trask Kurtosis

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

   Range of values
   Minimum:	0.02603
   Maximum:	0.291524
   Units:	Phi size
   Resolution:	1.0E-6

   Mean Phi

   Moment 1 measure of mean in phi (Source: producer defined)

   Range of values
   Minimum:	3.926387
   Maximum:	7.389967
   Units:	Phi size
   Resolution:	1.0E-6

   Mean mm

   Moment 1 measure of mean in mm (Source: producer defined)

   Range of values
   Minimum:	0.005962
   Maximum:	0.065772
   Units:	millimeter
   Resolution:	1.0E-6

   Variance Phi

   Moment 2 measure of variance (Source: producer defined)

   Range of values
   Minimum:	1.63064
   Maximum:	6.640921
   Units:	Phi size
   Resolution:	1.0E-6

   Std. Dev. Phi

   Standard deviation (Source: producer defined)

   Range of values
   Minimum:	1.276965
   Maximum:	2.576998
   Units:	Phi size
   Resolution:	1.0E-6

   Skewness Phi

   Moment 3 measure of skewness (Source: producer defined)

   Range of values
   Minimum:	-1.005589
   Maximum:	1.478336
   Units:	Phi size
   Resolution:	1.0E-6

   Kurtosis Phi

   Moment 4 measure of kurtosis (Source: producer defined)

   Range of values
   Minimum:	2.581778
   Maximum:	4.598639
   Units:	Phi size
   Resolution:	1.0E-6

   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)
   • Melissa M. Foley
2. Who also contributed to the data set?

   Angela Tam, Michael Torresan

3. To whom should users address questions about the data?
   USGS Pacific Coastal and Marine Science Center

   Attn: PCMSC Science Data Coordinator

   2885 Mission St

   Santa Cruz, CA
   

   USA

   831-427-4747 (voice)

   pcmsc_data@usgs.gov

Why was the data set created?

Data were obtained to assess the ecosystem response following the removal of two dams on the Elwha River between 2011 and 2014.

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: 01-Jul-2013 (process 1 of 6)

   Sediment was collected at one location in 2013 using a push core. A hand-held global positioning system was used to determine the location of the sampling location.

   Date: 04-Feb-2014 (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 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.

   Date: 09-Jun-2014 (process 3 of 6)

   Sediment was collected at five locations in 2014 using a push core. A hand-held global positioning system was used to determine the location of the sampling locations.

   Date: 18-Nov-2016 (process 4 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 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.

   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?
   Foley, Melissa M., Warrick, Jonathan A., Ritchie, Andrew C., Stevens, Andrew W., Shafroth, Patrick B., Duda, Jeffrey J., Beirne, Matthew M., Paradis, Rebecca, Gelfenbaum, Guy R., McCoy, Randall, and Cubley, Erin S., 2017, Coastal habitat and biological community response to dam removal on the Elwha River: Ecological Monographs, Ecological Society of America, Washington DC.

   Online Links:

   • http://doi.org/10.1002/ecm.1268

   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

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

   Online Links:

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

   Trask, Parker D., 1930, Mechanical analyses of sediments by centrifuge.

   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?
   No formal attribute accuracy tests were conducted.
2. How accurate are the geographic locations?
   A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
3. How accurate are the heights or depths?
   
4. Where are the gaps in the data? What is missing?
   Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
5. How consistent are the relationships among the observations, including topology?
   No formal logical accuracy tests were conducted.

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 as the originator(s) 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

   Denver Federal Center, Building 810, Mail Stop 302

   Denver, CO
   

   1-888-275-8747 (voice)

   sciencebase@usgs.gov
2. What's the catalog number I need to order this data set? Grain-size data are presented as a comma-delimited file (.csv) along with 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 Microsoft Excel for Mac 2011 14.7.1) Size: 0.08
     Network links:	https://www.sciencebase.gov/catalog/file/get/58f51816e4b0f6ac3c40393b https://doi.org/10.5066/F75B00N4

   • Cost to order the data: None.

Who wrote the metadata?

Dates:

Last modified: 13-Oct-2021

Metadata author:

USGS Pacific Coastal and Marine Science Center

Attn: PCMSC Science Data Coordinator

2885 Mission St

Santa Cruz, CA

USA

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

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