Entity_Type:
Entity_Type_Label: 2019-008-FA_sedsamps.xlsx
Entity_Type_Definition:
The attributes defined refer to the Excel spreadsheet column headings, and are also in the header row of the CSV file. The shapefile has these attributes (except ANALYSIS_I instead of ANALYSIS_ID and CLASSIFICA instead of CLASSIFICATION). Additionally, the shapefile has the software generated FID and shape, which are absent from the Excel spreadsheet and CSV file.
Entity_Type_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ANALYSIS_ID
Attribute_Definition:
Unique identification number generated in the sediment laboratory of the USGS's Woods Hole Coastal and Marine Science Center. This identifier consists of 2 characters followed by a dash and 6 numerics.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: FIELD_NO
Attribute_Definition:
Sample name or number as assigned in the field by the Chief Scientist.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: PROJECT
Attribute_Definition:
Name of project or project number under which samples were taken or data generated; sometimes project name indicates a more specific area.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: CRUISE_ID
Attribute_Definition:
Name or number of cruise on which sample collected. The cruise identifier is in the format YYYY-XXX-FA where YYYY is the survey year, XXX is the survey number of that year, and FA is Field Activity.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: CONTACT
Attribute_Definition:
Name of Principal Investigator or Chief Scientist responsible for data collection (usually first initial and last name) when available.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: AREA
Attribute_Definition:
General geographic area of data collection. Name is general enough to easily locate area on a state map.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition:
Latitude coordinate, in decimal degrees WGS84, of sample location. South latitude recorded as negative values.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 42.170197
Range_Domain_Maximum: 42.42136
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition:
Longitude coordinate, in decimal degrees WGS84, of sample location. West longitude is recorded as negative values.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.45694
Range_Domain_Maximum: -70.13719
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: DEPTH_M
Attribute_Definition:
Measured depth, in meters, of water overlying sediment at sample time. Depth value is not corrected for tides.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 24
Range_Domain_Maximum: 45
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: T_DEPTH
Attribute_Definition:
Top depth of sample, in centimeters, below the sediment-water interface.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute_Units_of_Measure: centimeters
Attribute:
Attribute_Label: B_DEPTH
Attribute_Definition:
Bottom depth of sample, in centimeters, below the sediment-water interface.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 2
Attribute_Units_of_Measure: centimeters
Attribute:
Attribute_Label: DEVICE
Attribute_Definition: Device used to collect the sample.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mini Seaboss w/ 0.1 sq m Van Veen grab
Enumerated_Domain_Value_Definition:
Sample collected with the SEABOSS system that uses the 0.1 square meter Van Veen grab.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: MONTH_COLL
Attribute_Definition: Calendar month sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7
Range_Domain_Maximum: 8
Attribute:
Attribute_Label: DAY_COLL
Attribute_Definition: Calendar day sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 31
Attribute:
Attribute_Label: YEAR_COLL
Attribute_Definition: Calendar year sample collected.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2019
Range_Domain_Maximum: 2019
Attribute:
Attribute_Label: MONTH_ANAL
Attribute_Definition: Calendar month sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 10
Range_Domain_Maximum: 10
Attribute:
Attribute_Label: DAY_ANAL
Attribute_Definition: Calendar day sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 11
Range_Domain_Maximum: 11
Attribute:
Attribute_Label: YEAR_ANAL
Attribute_Definition: Calendar year sample completed analysis.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2019
Range_Domain_Maximum: 2019
Attribute:
Attribute_Label: WEIGHT
Attribute_Definition: Weight of dry sample in grams.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 60.23
Range_Domain_Maximum: 159.67
Attribute_Units_of_Measure: grams
Attribute:
Attribute_Label: GRAVEL_PCT
Attribute_Definition:
Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 phi and larger).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 45.65
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SAND_PCT
Attribute_Definition:
Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm; 0 phi through 4 phi).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 54.28
Range_Domain_Maximum: 99.79
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SILT_PCT
Attribute_Definition:
Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5 phi through 8 phi, inclusive).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 0.66
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CLAY_PCT
Attribute_Definition:
Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; less than 8 phi).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.11
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CLASSIFICATION
Attribute_Definition:
Sediment description based on rigorous definition usually Shepard (1954) as modified by Schlee and Webster (1967), Schlee (1973), and Poppe and others (2014). These values represent all the possible values as defined in the USGS East Coast Sediment Texture Database data dictionary, and do not necessarily reflect the values present in this dataset.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: GRAVEL
Enumerated_Domain_Value_Definition: gravel equal to or greater than 50 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: GRAVELLY SEDIMENT
Enumerated_Domain_Value_Definition:
gravel equal to or greater than 10 percent, but less than 50 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SAND
Enumerated_Domain_Value_Definition: sand equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILTY SAND
Enumerated_Domain_Value_Definition:
sand less than 75 percent and equal to or greater than 50 percent, silt greater than clay, and clay less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAYEY SAND
Enumerated_Domain_Value_Definition:
sand less than 75 percent and equal to or greater than 50 percent, clay greater than silt, and silt less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILT
Enumerated_Domain_Value_Definition: silt equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SANDY SILT
Enumerated_Domain_Value_Definition:
silt less than 75 percent and equal to or greater than 50 percent, sand greater than clay, and clay less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAYEY SILT
Enumerated_Domain_Value_Definition:
silt less than 75 percent and equal to or greater than 50 percent, clay greater than sand, and sand less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CLAY
Enumerated_Domain_Value_Definition: clay equal to or greater than 75 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SANDY CLAY
Enumerated_Domain_Value_Definition:
clay less than 75 percent and equal to or greater than 50 percent, sand greater than silt, and silt less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SILTY CLAY
Enumerated_Domain_Value_Definition:
clay less than 75 percent and equal to or greater than 50 percent, silt greater than sand, and sand less than 20 percent
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SAND SILT CLAY
Enumerated_Domain_Value_Definition: clay, sand, and silt greater than 20 percent each
Enumerated_Domain_Value_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute:
Attribute_Label: MEDIAN
Attribute_Definition: Middle point in the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.67
Range_Domain_Maximum: 1.59
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: MEAN
Attribute_Definition: Average value in the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.81
Range_Domain_Maximum: 1.63
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: STDEV
Attribute_Definition:
Standard deviation (root mean square of the deviations) of the grain size distribution in phi units.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.52
Range_Domain_Maximum: 1.55
Attribute_Units_of_Measure: phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SKEWNESS
Attribute_Definition:
Skewness (deviation from symmetrical form) of the grain size distribution.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.63
Range_Domain_Maximum: 1.82
Attribute_Units_of_Measure: unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: KURTOSIS
Attribute_Definition:
Kurtosis (degree of curvature near the mode) of the grain size distribution.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.88
Range_Domain_Maximum: 32.48
Attribute_Units_of_Measure: unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: MODE1CLASS
Attribute_Definition:
First mode (particle size that occurs the most number of times) in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE1FREQ
Attribute_Definition:
Modal strength of the first mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE2CLASS
Attribute_Definition:
Second mode in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE2FREQ
Attribute_Definition:
Modal strength of the second mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE3CLASS
Attribute_Definition:
Third mode in phi units. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: MODE3FREQ
Attribute_Definition:
Modal strength of the third mode in percent. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: NMODES
Attribute_Definition:
Number of modes. This calculation is no longer made in the lab, but attribute value is maintained to be consistent with older datasets.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string. Blank
Attribute:
Attribute_Label: PHIM5
Attribute_Definition:
Weight percent of the sample in the -5 phi fraction and coarser (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles to cobbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM4
Attribute_Definition:
Weight percent of the sample in the -4 phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 5.4
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM3
Attribute_Definition:
Weight percent of the sample in the -3 phi fraction (nominal diameter of particles greater than or equal to 8 mm, but less than 16 mm); medium pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 10.41
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM2
Attribute_Definition:
Weight percent of the sample in the -2 phi fraction (nominal diameter of particles greater than or equal to 4 mm, but less than 8 mm); fine pebbles.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 15.16
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHIM1
Attribute_Definition:
Weight percent of the sample in the -1 phi fraction (nominal diameter of particles greater than or equal to 2 mm, but less than 4 mm); very fine pebbles (granules).
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 22.84
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_0
Attribute_Definition:
Weight percent of the sample in the 0 phi fraction (nominal diameter of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.36
Range_Domain_Maximum: 56.75
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_1
Attribute_Definition:
Weight percent of the sample in the 1 phi fraction (nominal diameter of particles greater than or equal to 0.5 mm, but less than 1 mm); coarse sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9.41
Range_Domain_Maximum: 71.97
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_2
Attribute_Definition:
Weight percent of the sample in the 2 phi fraction (nominal diameter of particles greater than or equal to 0.25 mm, but less than 0.5 mm); medium sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.73
Range_Domain_Maximum: 71.43
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_3
Attribute_Definition:
Weight percent of the sample in the 3 phi fraction (nominal diameter of particles greater than or equal to 0.125 mm, but less than 0.25 mm); fine sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.03
Range_Domain_Maximum: 21.04
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_4
Attribute_Definition:
Weight percent of the sample in the 4 phi fraction (nominal diameter of particles greater than or equal to 0.0625 mm, but less than 0.125 mm); very fine sand.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.07
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_5
Attribute_Definition:
Weight percent of the sample in the 5 phi fraction (nominal diameter of particles greater than or equal to 0.031 mm, but less than 0.0625 mm); coarse silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.17
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_6
Attribute_Definition:
Weight percent of the sample in the 6 phi fraction (nominal diameter of particles greater than or equal to 0.016 mm, but less than 0.031 mm); medium silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.16
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_7
Attribute_Definition:
Weight percent of the sample in the7 phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 0.21
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_8
Attribute_Definition:
Weight percent of the sample in the 8 phi fraction (nominal diameter of particles greater than or equal to 0.004 mm, but less than 0.008 mm); very fine silt.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.19
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_9
Attribute_Definition:
Weight percent of the sample in the 9 phi fraction (nominal diameter of particles greater than or equal to 0.002 mm, but less than 0.004 mm); coarse clay.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.08
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_10
Attribute_Definition:
Weight percent of the sample in the 10 phi fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay.
Attribute_Definition_Source: USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.03
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: PHI_11
Attribute_Definition:
Weight percent of the sample in the 11 phi fraction and finer (nominal diameter of particles less than 0.001 mm; fine clay.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.04
Attribute_Units_of_Measure: percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: ANALYST
Attribute_Definition:
Initials of person who performed the grain size or physical properties analysis. In this case, ARP stands for Allison R. Paquette
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: QUALITY_GR
Attribute_Definition:
Quality grades for sample data are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results. A quality grade is assigned as well as the initials of the person that assigned the grading in the format Q-XX where Q is the quality grade and XX are the initials of the person assigning the grade.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: A-BJB
Enumerated_Domain_Value_Definition:
A = percent differences between 0% and +- 1.5% assigned by Brian J. Buczkowski.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: B-BJB
Enumerated_Domain_Value_Definition:
B = percent differences between +- 1.5% and +- 3% assigned by Brian J. Buczkowski.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quality grade: C-BJB
Enumerated_Domain_Value_Definition:
C = percent differences between +- 3% and +- 4.5% assigned by Brian J. Buczkowski.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: LITHOLOGY
Attribute_Definition:
General lithologic description of sample. This field is not always filled in, so can have blanks.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: COMMENTS
Attribute_Definition:
Comments on sample collection or lithology. This field is not always filled in, so can have blanks.
Attribute_Definition_Source:
modified from USGS East Coast Sediment Texture Database data dictionary
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Entity_and_Attribute_Overview:
These attribute definitions describe each column of information in the Excel spreadsheet with the exception of additional information in the last column of the Excel spreadsheet which contains an explanation of the QUALITY_GR values and how the quality grade is assigned. That column of information is omitted from the CSV file and shapefile. The first row of the spreadsheet is the column heading. The CSV file has the same information and the same column definitions except the last column of the XLSX file is omitted (data quality grade explanation). The information in the last column of the XLSX file is as follows:
Data quality grades may be determined by several factors, and any comments or notes that indicate the data for a particular sample may be suspect are included in the results table for that sample under "comments". Quality grades for sample data that do not have any additional comments are assigned based on the calculated percent difference between the weights of the coarse fraction remaining after wet sieving and the sum of all of the weighed fractions after dry sieving the coarse fraction, indicating an estimated differing amount of material which could skew the calculated grain size results.
A = percent differences between 0% and +-1.5%
B = percent differences between +-1.5% and +-3%
C = percent differences between +-3% and +-4.5%
D = percent differences greater than +-4.5%
Citations used in attribute definitions:
Poppe, L.J., McMullen, K.Y., Williams, S.J., and Paskevich, V.F., eds., 2014, USGS east-coast sediment analysis: Procedures, database, and GIS data (ver. 3.0, November 2014): U.S. Geological Survey Open-File Report 2005-1001,
http://pubs.usgs.gov/of/2005/1001/.
Schlee, J., and Webster, J., 1967, A computer program for grain-size data: Sedimentology, v. 8, p. 45-54.
Schlee, J., 1973, Atlantic continental shelf and slope of the United States -- sediment texture of the northeastern part: U.S. Geological Survey Professional Paper 529-L, 64 p.
Shepard, F.P., 1954, Nomenclature based on sand-silt-clay ratios: Journal Sedimentary Petrology, v. 24, p. 151-158.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey