Grain-size data from core S3-15G, Monterey Fan, Central California

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  5. What is the general form of this data set?
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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?
   McGann, Mary, Low, Stephen, Tan, Angela C., and Torresan, Michael E., 20230720, Grain-size data from core S3-15G, Monterey Fan, Central California: data release DOI:10.5066/P9DZ321R, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

   Online Links:

   • https://doi.org/10.5066/P9DZ321R
   • https://www.sciencebase.gov/catalog/item/6483777ed34ef77fcafcdaff

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -123.3420
   East_Bounding_Coordinate: -123.3420
   North_Bounding_Coordinate: 36.3922
   South_Bounding_Coordinate: 36.3922
   

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

   Calendar_Date: 31-May-1978

   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 (35)
   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 North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.978698214.
      
7. How does the data set describe geographic features?

   A comma-delimited text file with the first line being a header line.

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

   FAN_ID

   Unique alphanumeric identifier for the U.S. Geological Survey field activity, in F-F-FF-FF format (e.g., S-3-78-SC) based on an abbreviation of the ship (e.g., S=Sea Sounder), the number of the cruise by that ship in the year (e.g., 3=third cruise), the year of the cruise (e.g., 78=1978), and an abbreviation of the geographic location of the cruise (e.g., SC=Southern California). (Source: producer defined) Unique Fan ID name

   Sample_ID

   Unique alphanumberic identifier for the sample in XXX_XX-XX cm format (e.g., 15G_20-22_cm), based on the core number (e.g., 15G) and the sample interval in cm (e.g. 20-22_cm). (Source: producer defined) Unique sample ID names

   Lab_ID

   Unique alphanumberic identifier for the Lab ID in FFFFFF_XX format, where FFFFFF is the 6-digit field activity number (FAN) ID code (e.g., S378SC=S-3-78-SC), 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

   Date_Collected

   Date of sample collection in M/DD/YY format, where M=month, DD=day, and YY=years in the millennium 1900 (for example, May 31, 1978=5/31/78) (Source: producer defined)

   Range of values
   Minimum:	5/31/78
   Maximum:	5/31/78
   Units:	Dates in M/DD/YY format

   Latitude

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

   Range of values
   Minimum:	36.39453
   Maximum:	36.39453
   Units:	decimal degrees

   Longitude

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

   Range of values
   Minimum:	-123.34042
   Maximum:	-123.34042
   Units:	decimal degrees

   Wt. percent in -4.00 phi bin or 16 mm bin

   Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm. (Source: producer defined)

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

   Wt. percent in -3.75 phi bin or 13.5 mm bin

   Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm. (Source: producer defined)

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

   Wt. percent in -3.50 phi bin or 11.2 mm bin

   Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm. (Source: producer defined)

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

   Wt. percent in -3.25 phi bin or 9.51 mm bin

   Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm. (Source: producer defined)

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

   Wt. percent in -3.00 phi bin or 8 mm bin

   Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm. (Source: producer defined)

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

   Wt. percent in -2.75 phi bin or 6.73 mm bin

   Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm. (Source: producer defined)

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

   Wt. percent in -2.50 phi bin or 5.66 mm bin

   Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm. (Source: producer defined)

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

   Wt. percent in -2.25 phi bin or 4.76 mm bin

   Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm. (Source: producer defined)

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

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

   Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm. (Source: producer defined)

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

   Wt. percent in -1.75 phi bin or 3.36 mm bin

   Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm. (Source: producer defined)

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

   Wt. percent in -1.50 phi bin or 2.83 mm bin

   Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm. (Source: producer defined)

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

   Wt. percent in -1.25 phi bin or 2.38 mm bin

   Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm. (Source: producer defined)

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

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

   Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm. (Source: producer defined)

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

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

   Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm. (Source: producer defined)

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

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

   Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm. (Source: producer defined)

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

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

   Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm. (Source: producer defined)

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

   Wt. percent in 0.00 phi bin or 1 mm bin

   Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm. (Source: producer defined)

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

   Wt. percent in 0.25 phi bin or 0.8409 mm bin

   Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm. (Source: producer defined)

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

   Wt. percent in 0.50 phi bin or 0.7071 mm bin

   Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm. (Source: producer defined)

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

   Wt. percent in 0.75 phi bin or 0.5946 mm bin

   Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm. (Source: producer defined)

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

   Wt. percent in 1.00 phi bin or 0.5 mm bin

   Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm. (Source: producer defined)

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

   Wt. percent in 1.25 phi bin or 0.4204 mm bin

   Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm. (Source: producer defined)

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

   Wt. percent in 1.50 phi bin or 0.3536 mm bin

   Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm. (Source: producer defined)

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

   Wt. percent in 1.75 phi bin or 0.2973 mm bin

   Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm. (Source: producer defined)

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

   Wt. percent in 2.00 phi bin or 0.25 mm bin

   Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm. (Source: producer defined)

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

   Wt. percent in 2.25 phi bin or 0.2102 mm bin

   Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm. (Source: producer defined)

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

   Wt. percent in 2.50 phi bin or 0.1768 mm bin

   Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm. (Source: producer defined)

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

   Wt. percent in 2.75 phi bin or 0.1487 mm bin

   Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm. (Source: producer defined)

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

   Wt. percent in 3.00 phi bin or 0.125 mm bin

   Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm. (Source: producer defined)

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

   Wt. percent in 3.25 phi bin or 0.1051 mm bin

   Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm. (Source: producer defined)

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

   Wt. percent in 3.50 phi bin or 0.08839 mm bin

   Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.08839 and 0.1051 mm. (Source: producer defined)

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

   Wt. percent in 3.75 phi bin or 0.07433 mm bin

   Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm. (Source: producer defined)

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

   Wt. percent in 4.00 phi bin or 0.0625 mm bin

   Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.07433 mm. (Source: producer defined)

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

   Wt. percent in 4.25 phi bin or 0.052556 mm bin

   Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm. (Source: producer defined)

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

   Wt. percent in 4.50 phi bin or 0.044194 mm bin

   Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm. (Source: producer defined)

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

   Wt. percent in 4.75 phi bin or 0.037163 mm bin

   Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm. (Source: producer defined)

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

   Wt. percent in 5.00 phi bin or 0.03125 mm bin

   Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm. (Source: producer defined)

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

   Wt. percent in 5.25 phi bin or 0.02628 mm bin

   Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.02628 and 0.03125 mm. (Source: producer defined)

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

   Wt. percent in 5.50 phi bin or 0.0221 mm bin

   Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.0221 and 0.02628 mm. (Source: producer defined)

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

   Wt. percent in 5.75 phi bin or 0.01858 mm bin

   Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.01858 and 0.0221 mm. (Source: producer defined)

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

   Wt. percent in 6.00 phi bin or 0.01563 mm bin

   Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.01563 and 0.01858 mm. (Source: producer defined)

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

   Wt. percent in 6.25 phi bin or 0.01314 mm bin

   Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.01314 and 0.01563 mm. (Source: producer defined)

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

   Wt. percent in 6.50 phi bin or 0.01105 mm bin

   Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.01105 and 0.01314 mm. (Source: producer defined)

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

   Wt. percent in 6.75 phi bin or 0.00929 mm bin

   Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.00929 and 0.01105 mm. (Source: producer defined)

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

   Wt. percent in 7.00 phi bin or 0.00781 mm bin

   Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.00781 and 0.00929 mm. (Source: producer defined)

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

   Wt. percent in 7.25 phi bin or 0.00657 mm bin

   Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.00781 mm. (Source: producer defined)

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

   Wt. percent in 7.50 phi bin or 0.00552 mm bin

   Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.00552 and 0.00657 mm. (Source: producer defined)

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

   Wt. percent in 7.75 phi bin or 0.00465 mm bin

   Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.00465 and 0.00552 mm. (Source: producer defined)

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

   Wt. percent in 8.00 phi bin or 0.00391 mm bin

   Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.00391 and 0.00465 mm. (Source: producer defined)

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

   Wt. percent in 8.25 phi bin or 0.00329 mm bin

   Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.00329 and 0.00391 mm. (Source: producer defined)

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

   Wt. percent in 8.50 phi bin or 0.00276 mm bin

   Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.00276 and 0.00329 mm. (Source: producer defined)

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

   Wt. percent in 8.75 phi bin or 0.00232 mm bin

   Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.00232 and 0.00276 mm. (Source: producer defined)

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

   Wt. percent in 9.00 phi bin or 0.00195 mm bin

   Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.00195 and 0.00232 mm. (Source: producer defined)

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

   Wt. percent in 9.25 phi bin or 0.00164 mm bin

   Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.00164 and 0.00195 mm. (Source: producer defined)

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

   Wt. percent in 9.50 phi bin or 0.00138 mm bin

   Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.00138 and 0.00164 mm. (Source: producer defined)

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

   Wt. percent in 9.75 phi bin or 0.00116 mm bin

   Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.00116 and 0.00138 mm. (Source: producer defined)

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

   Wt. percent in 9.99 phi bin or 0.00098 mm bin

   Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.00098 and 0.00116 mm. (Source: producer defined)

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

   Wt. percent in 10.25 phi bin or 0.00082 mm bin

   Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.00082 and 0.00098 mm. (Source: producer defined)

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

   Wt. percent in 10.50 phi bin or 0.00069 mm bin

   Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.00069 and 0.00082 mm. (Source: producer defined)

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

   Wt. percent in 10.75 phi bin or 0.00058 mm bin

   Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.00058 and 0.00069 mm. (Source: producer defined)

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

   Wt. percent in 10.99 phi bin or 0.00049 mm bin

   Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.00049 and 0.00058 mm. (Source: producer defined)

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

   Wt. percent in 11.25 phi bin or 0.0004 mm bin

   Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.0004 and 0.00049 mm. (Source: producer defined)

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

   Wt. percent in 11.48 phi bin or 0.00035 mm bin

   Weight percent of sample with grain diameter between 11.25 and 11.48 phi, or 0.00035 and 0.0004 mm. (Source: producer defined)

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

   Wt. percent in 12.02 phi bin or 0.000241 mm bin

   Weight percent of sample with grain diameter between 11.48 and 12.02 phi, or 0.000241 and 0.00035 mm. (Source: producer defined)

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

   Wt. percent in 13.02 phi bin or 0.00012 mm bin

   Weight percent of sample with grain diameter between 12.02 and 13.02 phi, or 0.00012 and 0.000241 mm. (Source: producer defined)

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

   Percent Gravel

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

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

   Percent Sand

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

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

   Percent Silt

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

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

   Percent Clay

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

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

   Percent Mud

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

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

   Gravel to Sand Ratio

   ratio of percent gravel in sample to percent sand. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	0
   Units:	no unit

   Sand to Silt Ratio

   ratio of percent sand in sample to percent silt. (Source: producer defined)

   Range of values
   Minimum:	0.005
   Maximum:	0.913
   Units:	no unit

   Silt to Clay Ratio

   ratio of percent silt in sample to percent clay. (Source: producer defined)

   Range of values
   Minimum:	1.313
   Maximum:	3.767
   Units:	no unit

   Sand to Clay Ratio

   ratio of percent sand in sample to percent clay. (Source: producer defined)

   Range of values
   Minimum:	0.007
   Maximum:	2.625
   Units:	no unit

   Sand to Mud Ratio

   ratio of percent sand in sample to percent mud. (Source: producer defined)

   Range of values
   Minimum:	0.003
   Maximum:	0.677
   Units:	no unit

   Gravel to Mud Ratio

   ratio of percent gravel in sample to percent mud. (Source: producer defined)

   Range of values
   Minimum:	0
   Maximum:	0
   Units:	no unit

   D5 Phi

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

   Range of values
   Minimum:	1.517
   Maximum:	4.962
   Units:	Phi size

   D10 Phi

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

   Range of values
   Minimum:	2.290
   Maximum:	5.436
   Units:	Phi size

   D16 Phi

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

   Range of values
   Minimum:	2.885
   Maximum:	5.919
   Units:	Phi size

   D25 Phi

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

   Range of values
   Minimum:	3.360
   Maximum:	6.514
   Units:	Phi size

   D50 Phi

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

   Range of values
   Minimum:	4.462
   Maximum:	7.675
   Units:	Phi size

   D75 Phi

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

   Range of values
   Minimum:	6.763
   Maximum:	8.989
   Units:	Phi size

   D84 Phi

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

   Range of values
   Minimum:	7.912
   Maximum:	9.572
   Units:	Phi size

   D90 Phi

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

   Range of values
   Minimum:	8.846
   Maximum:	10.008
   Units:	Phi size

   D95 Phi

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

   Range of values
   Minimum:	9.749
   Maximum:	10.450
   Units:	Phi size

   D95 mm

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

   Range of values
   Minimum:	0.0007
   Maximum:	0.0012
   Units:	millimeters

   D90 mm

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

   Range of values
   Minimum:	0.0010
   Maximum:	0.0022
   Units:	millimeters

   D84

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

   Range of values
   Minimum:	0.0013
   Maximum:	0.0042
   Units:	millimeters

   D75 mm

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

   Range of values
   Minimum:	0.0020
   Maximum:	0.0092
   Units:	millimeters

   D50 mm

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

   Range of values
   Minimum:	0.0049
   Maximum:	0.0454
   Units:	millimeters

   D25 mm

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

   Range of values
   Minimum:	0.0109
   Maximum:	0.0974
   Units:	millimeters

   D16 mm

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

   Range of values
   Minimum:	0.0165
   Maximum:	0.1354
   Units:	millimeters

   D10 mm

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

   Range of values
   Minimum:	0.0231
   Maximum:	0.2045
   Units:	millimeters

   D5 mm

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

   Range of values
   Minimum:	0.0321
   Maximum:	0.3495
   Units:	millimeters

   F-W Median Phi

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

   Range of values
   Minimum:	4.461783
   Maximum:	7.674766
   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:	5.119565
   Maximum:	7.720945
   Units:	Phi size

   F-W Sorting Phi

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

   Range of values
   Minimum:	1.741673
   Maximum:	2.608938
   Units:	Phi size

   F-W Skewness Phi

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

   Range of values
   Minimum:	-0.031283
   Maximum:	0.445623
   Units:	Phi size

   F-W Kurtosis Phi

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

   Range of values
   Minimum:	0.761472
   Maximum:	0.967967
   Units:	Phi size

   Inman Median Phi

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

   Range of values
   Minimum:	4.461783
   Maximum:	7.674766
   Units:	Phi size

   Inman Mean Phi

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

   Range of values
   Minimum:	5.448456
   Maximum:	7.744035
   Units:	Phi size

   Inman Sorting Phi

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

   Range of values
   Minimum:	1.809286
   Maximum:	2.684805
   Units:	Phi size

   Inman Skew 16-84 Phi

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

   Range of values
   Minimum:	-0.056786
   Maximum:	0.442881
   Units:	Phi size

   Inman Skew 05-95 Phi

   skewness for sample (D05-D95) by Inman (1952) method. (Source: producer defined)

   Range of values
   Minimum:	-0.012119
   Maximum:	0.703736
   Units:	Phi size

   Inman Kurtosis Phi

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

   Range of values
   Minimum:	0.375739
   Maximum:	0.569559
   Units:	Phi size

   Trask Median mm

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

   Range of values
   Minimum:	0.004894
   Maximum:	0.045381
   Units:	millimeters

   Trask Mean mm

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

   Range of values
   Minimum:	0.006482
   Maximum:	0.053311
   Units:	millimeters

   Trask Sorting mm

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

   Range of values
   Minimum:	2.328209
   Maximum:	3.771691
   Units:	millimeters

   Trask Skewness mm

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

   Range of values
   Minimum:	0.396724
   Maximum:	1.265337
   Units:	millimeters

   Trask Kurtosis mm

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

   Range of values
   Minimum:	0.195854
   Maximum:	0.320476
   Units:	millimeters

   Mean Phi

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

   Range of values
   Minimum:	5.166227
   Maximum:	7.708305
   Units:	Phi size

   Mean mm

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

   Range of values
   Minimum:	0.004782
   Maximum:	0.027849
   Units:	millimeters

   Variance Phi

   variance for sample. (Source: producer defined)

   Range of values
   Minimum:	2.784207
   Maximum:	6.429201
   Units:	Phi size

   Std. Dev. Phi

   standard deviation for sample. (Source: producer defined)

   Range of values
   Minimum:	1.668594
   Maximum:	2.535587
   Units:	Phi size

   Skewness Phi

   skewness for sample. (Source: producer defined)

   Range of values
   Minimum:	-0.145249
   Maximum:	0.812142
   Units:	Phi size

   Kurtosis Phi

   kurtosis for sample. (Source: producer defined)

   Range of values
   Minimum:	1.998866
   Maximum:	3.144281
   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)
   • Mary McGann
   • Stephen Low
   • Angela C. Tan
   • Michael E. Torresan
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: 31-May-1978 (process 1 of 3)

   Acquisition of core. Core S3-15G was collected on May 31, 1978 using a gravity corer from the R/V Sea Sounder at a water depth of 3491 m.

   Date: 27-Aug-2016 (process 2 of 3)

   Grain-size distributions determined. 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: 02-Jun-2023 (process 3 of 3)

   INTERPOLATED SIZES WITH COLUMN HEADING CORRECTION: Grain sizes at select cumulative percentage values (D) were calculated by the PCMSC Sediment Lab software pcSDSZ version 2.00 using a polynomial interpolation between phi bins bracketing the specified D value. Grain sizes were converted into units of millimeters (mm) using the formula mm=reciprocal of 2(exponent)phi. Grain sizes at D5, D10, D16, D25, D50, D75. D84, D90, and D95 are reported in phi and millimeter units. PCMSC Sediment Lab data reports issued between February 2011 and August 2022 were revised so that the column headers for the Interpolated Sizes in millimeter units (mm) were transposed from increasing to decreasing D values to correctly reflect the columns of data. This revised metadata shows the column heading correction, which also appears in the corresponding revised data table. Person who carried out this activity:
   

   Angela CML Tan

   U.S. Geological Survey, SOUTHWEST REGION

   Physical Scientist

   2885 Mission Street

   Santa Cruz, CA
   

   US

   831-460-7409 (voice)

   831-427-4748 (FAX)

   atan@usgs.gov

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 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..

   Online Links:

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

   Trask, Parker D., 1930, Mechanical analyses of sediments by centrifuge Other_Citation_Details: Trask, P.D., 1930, Mechanical analyses of sediments by centrifuge: Economic Geology, v. 26, n. 6, p. 581-599..

   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 calibration 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. The horizontal accuracy was determined with the ship's Integrated navigation system, SINS, with an estimated time-dependent system accuracy of 0.1 to 2 nautical miles per hour, Magnavox Loran-C (estimated accuracy range of 0.1 to 0.25 nautical miles), radar (estimated accuracy variable), Motorola Mini-Ranger microwave system with estimated accuracy of 3 meters, and a transit satellite (estimated accuracy of 10 meters).
3. How accurate are the heights or depths?
   A formal accuracy assessment of the vertical positional information in the data set has not been conducted. The vertical accuracy was determined with a Motorola Mini-Ranger microwave system, estimated accuracy of 3 meters.
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 metadata for each part of this data release 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 - ScienceBase

   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 a comma-separated values file (S-3-78-SC_grain_size_v2.csv)
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:	.csv file in format comma-delimited text (version 14.7.7) Size: 0.0335
     Network links:	https://www.sciencebase.gov/catalog/file/get/6483777ed34ef77fcafcdaff https://doi.org/10.5066/P9DZ321R

   • Cost to order the data: None.

5. What hardware or software do I need in order to use the data set?
   These data can be viewed with any text editor software.

Who wrote the metadata?

Dates:

Last modified: 20-Jul-2023

Metadata author:

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

Attn: PCMSC Science Data Coordinator

2885 Mission Street

Santa Cruz, CA

831-427-4747 (voice)

pcmsc_data@usgs.gov

Metadata standard:

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