ECSTDB2014.SHP: U.S. Geological Survey East Coast Sediment Texture Database (2014)

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Frequently-anticipated questions:


What does this data set describe?

Title:
ECSTDB2014.SHP: U.S. Geological Survey East Coast Sediment Texture Database (2014)
Abstract:
This sediment database contains location, description, and texture of samples taken by numerous marine sampling programs. Most of the samples are from the Atlantic Continental Margin of the United States, but some are from as diverse locations as Lake Baikal, Russia, the Hawaiian Islands region, Puerto Rico, the Gulf of Mexico, and Lake Michigan. The database presently contains data for over 27,000 samples, which includes texture data for approximately 3800 samples taken or analyzed by the Atlantic Continental Margin Program (ACMP), a joint U.S. Geological Survey/Woods Hole Oceanographic Institution project conducted from 1962 to 1970. As part of the ACMP, some historical data from samples collected between 1955 and 1962 were also incorporated into the dataset.
  1. How should this data set be cited?

    U.S. Geological Survey, 2014, ECSTDB2014.SHP: U.S. Geological Survey East Coast Sediment Texture Database (2014): Open-File Report 2005-1001, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Poppe, L.J., McMullen, K.Y., Williams, S.J., and Paskevich, V.F., 2014, USGS East-Coast Sediment Analysis: Procedures, Database, and GIS Data: Open-File Report 2005-1001, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -170.520000
    East_Bounding_Coordinate: 123.556830
    North_Bounding_Coordinate: 80.813770
    South_Bounding_Coordinate: -16.232067

  3. What does it look like?

    <http://pubs.usgs.gov/of/2005/1001/data/surficial_sediments/ecstdb2014.gif> (GIF)
    Location of USGS East Coast surficial sediment samples (ecstdb2014) displayed on world map

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

    Beginning_Date: 1955
    Ending_Date: Mar-2014
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Entity point (27784)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

  7. How does the data set describe geographic features?

    ecstdb2014
    Shapefile Attribute Table (Source: ESRI)

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    GROUP
    Number assigned to data based on source. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    ValueDefinition
    1Samples taken before start of the joint USGS/WHOI project.
    2USGS/WHOI Atlantic Continental Margin Program stations
    3Sediment entirely or partially analyzed, processed, or visually described by USGS Woods Hole scientists; most samples analyzed in the USGS Woods Hole Sediment Laboratory.

    DB_ID
    Unique identification number generated in the sedimentation laboratory of the USGS's Woods Hole Coastal and Marine Science Center. For samples analyzed after 1980 this identifier consists of 2 characters and 3 numerics (e.g. AS114). For samples analyzed prior to 1980, this identifier consists of 4 numerics possibly followed by as many as 2 characters. (Source: USGS East Coast Sediment Texture Database data dictionary)

    FIELD_NO
    Sample name or number as assigned in the field by the Chief Scientist (Source: USGS East Coast Sediment Texture Database data dictionary)

    PROJECT
    Name of project or project number under which samples were taken or data generated; sometimes project name indicates a more specific area (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    CRUISE_ID
    Name or number of cruise on which sample collected. Historically cruise identifiers were a combination of ship name, year of cruise and cruise leg. In more recent years, cruise identifier is a sequential serial number assigned to field activities within a specific year. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    CONTACT
    Name of Principal Investigator or Chief Scientist responsible for data collection (usually first initial and last name) when available. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    AREA
    General geographic area of data collection. Name is general enough to easily locate area on a state map. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    LATITUDE
    Latitude coordinate, in decimal-degrees, of sample location. South latitude recorded as negative values. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-16.2320670
    Maximum:80.81377
    Units:signed decimal degrees
    Resolution:.00000001

    LONGITUDE
    Longitude coordinate, in decimal degrees, of sample location. West longitude is recorded as negative values. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-170.52
    Maximum:123.55683
    Units:signed decimal degrees
    Resolution:.00000001

    DEPTH_M
    Measured depth of water overlying sediment at sample time, generally not corrected for tides, in meters. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:6945
    Units:meters
    Resolution:.01

    T_DEPTH
    Top depth of the sample below the sediment-water interface, in centimeters. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:115049
    Units:centimeters
    Resolution:1

    B_DEPTH
    Bottom depth of the sample below the sediment-water interface, in centimeters. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:115054
    Units:centimeters
    Resolution:1

    DEVICE
    Device used to collect the sample. A blank indicates unknown device. (Source: USGS East Coast Sediment Texture Database data dictionary)

    ValueDefinition
    1 METER PLANKTON NET 
    1-METER DREDGE 
    3/4 METER PLANKTON NET 
    35MM STEREO CAMERA+DRED 
    ANCHOR DREDGE 
    ANCHOR FLUKES 
    ANCHOR SAMPLE 
    BLAKE TRAWL 
    BOOMERANG CORER 
    BOT DRIFTER SALINOMETER 
    BOTTOM DRIFTER 
    BOTTOM DRIFTER BUG 
    BOTTOM SKIMMER 
    BOX CORE 
    BOX SAMPLER 
    CAM GRAB W/O CAM+PLANK T 
    CAMERA SLED 
    CAMPBELL GRAB W/ CAMERA 
    CAMPBELL GRAB W/O CAMERA 
    CHAIN BAG 
    CHAIN BAG DREDGE 
    CHAIN BAG+PIPE DREDGE 
    CHAIN BAG+SM PIPE DREDGE 
    CHAIN BAG+PIPE 
    CHAIN BAG+PIPE DREDGE 
    CHAIN BAG+SM PIPE 
    CHAIN BAG+SM PIPE DREDGE 
    CHAIN DREDGE 
    CORING TUBE IN MECH ARM 
    D-L SNAPPER 
    D-L SNAPPER + DREDGE 
    D-L SNAPPER + GRAV COR 
    DIETZ-LAFOND 
    DIETZ-LAFOND GRAB 
    DIETZ-LAFOND SNAPPER 
    DIGBY DREDGE 
    DIGBY DREDGE W/ CNVS BAG 
    DRAG DREDGE 
    DREDGE 
    Drilled Sample 
    DRILLED SAMPLE 
    EDGERTON CAMERA 
    GOS ANCHOR CHAIN 
    GRAB SAMPLER 
    GRAPPLING HOOK 
    GRAVITY CORER 
    HAND SAMPLE 
    Hand Sample 
    HYDROSTATIC CORE 
    HYDROSTATIC CORER 
    Hydrostatic CORER 
    IKU GRAB 
    JAPANESE DREDGE 
    M-VV GRAB + D-LF SNAPPER 
    M-VV GRAB + GRAVITY COREmodified Van Veen grab sampler and gravity corer
    MECH ARM + CORE DRILL 
    MECH ARM W/ CORER 
    MECH ARM W/ PRY BAR 
    MECHANICAL ARM 
    MINIATURE VAN VEEN 
    MINIATURE VAN VEEN W/O C. 
    MODIFIED PIERCE DREDGE 
    NAnot applicable
    NATURALIST DREDGE 
    NISKIN SAMPLER 
    OTHER 
    PAUL CORER 
    PIPE DREDGE 
    PIPE DREDGE AND D-L SNAP 
    PIPE DREDGE, 12 INCH 
    PISTON CORER 
    PONAR SAMPLER 
    PULSE AUGER 
    PUSH CORER 
    Pulse Auger 
    RAKED INTO BASKET W/ ARM 
    RING NET 
    ROCKER DREDGE 
    ROTARY CORER 
    ROTOSONIC CORER 
    SALINOMETER, VANDORN BOTS 
    SCALLOP DREDGE 
    SCOOP FISH 
    SEDIMENT TRAP 
    SHIPEK GRAB 
    SMALL VAN VEEN 
    SMITH-MAC+MIN W, CAMERA 
    SMITH-MACINTYRE GRAB 
    SMITH-MACINTYRE W/ CAMERA 
    SMITH-MACINTYRE W/O CAMERA 
    SMITH/MAC AND NISKIN SPL 
    SUBMERSIBLE SAMPLE 
    Submersible Sample 
    TRAWL 
    TRIGGER CORE 
    UNKNOWN 
    VAN VEEN AND CORE 
    VAN VEEN GRAB 
    Van Veen Grab 
    VIBRA CORE 
    VISUAL OBSERVATION 
    VV GRAB + D-L SNAPPER 
    WATER PUMP ONLY 
    BIG SEABOSS GRAB 
    CRAIB CORER 
    DIVER GRABS 
    DIVER PUSH CORE 
    DIVER, HAND 
    DIVERS, BY HAND 
    DRILL CORE 
    DRILLED CORE 
    GRAB 
    GRAVITY CORE 
    HAND 
    MID-SIZED SEABOSS GRAB 
    MINI SEABOSS 
    MINI-SEABOSS 
    PISTON CORE 
    PISTON SAMPLER (HYDRAULIC) 
    PONAR GRAB 
    ROTOSONIC CORE 
    SMALL SEABOSS GRAB 
    SUBMERSIBLE ARM GRAB 
    TEFLON SHOVEL 
    TROWEL 
    VIBRACORE 
    VIBRACORER 
    WHOI GIANT GRAVITY CORER 
    SEABOSS (BIG) 
    EPA VanVeen 
    Diver 
    Craib 
    USGS Slow Corer 
    SEABOSS 
    Drill rig 
    Metal scoop 
    InterOcean SeaBoss (osprey config) 
    MicroSEABOSS (a.k.a. SEABOSSpro, a.k.a. GoProSEABOSS) 
    Scoop 
    Rock Dredge 
    vanveen 
    ROV push core 

    Character string of width 254

    MONTH_COLL
    Calendar month sample collected. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:1
    Maximum:12
    Units:month of year
    Resolution:1

    DAY_COLL
    Calendar day sample collected. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:1
    Maximum:31
    Units:day of month
    Resolution:1

    YEAR_COLL
    Calendar year sample collected. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:1955
    Maximum:2014
    Units:year
    Resolution:1

    MONTH_ANAL
    Calendar month sample completed analysis. No data value -9999. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    Range of values
    Minimum:1
    Maximum:12
    Units:month of year
    Resolution:1

    DAY_ANAL
    Calendar day sample completed analysis. No data value -9999. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    Range of values
    Minimum:1
    Maximum:31
    Units:day of month
    Resolution:1

    YEAR_ANAL
    Calendar year sample completed analysis. No data value -9999. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    Range of values
    Minimum:1969
    Maximum:2014
    Units:year
    Resolution:1

    WEIGHT
    Weight of dry sample in grams. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.01
    Maximum:9086.1
    Units:grams
    Resolution:.0001

    GRAVEL_PCT
    Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1 Phi and larger). No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    SAND_PCT
    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). No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:102
    Units:percent
    Resolution:.01

    SILT_PCT
    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). No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    CLAY_PCT
    Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9 Phi and smaller). No data value -9999. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    Range of values
    Minimum:0.00
    Maximum:94.71
    Units:percent
    Resolution:.01

    CLASSIFICA
    Sediment Classification - Sediment description based on a rigorous definition, usually Shepard (1954) as modified by Schlee and Webster (1967), Schlee (1973), and Poppe and others (2005). A blank cell means a classification was not recorded for the sample. (Source: USGS Woods Hole Coastal and Marine Science Center Sediment Laboratory)

    ValueDefinition
    BEDROCKSolid rock.
    BOULDERSRocks with diameters greater than 256 mm.
    CLAYSediment whose main phase is less than 0.004 mm.
    CLAYEY SANDSediment whose main phase is sand, but with significant clay.
    CLAYEY SILTSediment whose main phase is silt, but with significant clay.
    GRAVELSediment whose main phase is >2 mm.
    GRAVELLY SEDIMENTSediment whose main phase is >2 mm, but with significant other sediment. Gravel > 10 percent.
    SANDSediment whose main phase is less than 2 mm, but greater than or equal to 0.062 mm.
    SAND SILT CLAYSediment with significant (over 20 percent) sand, silt, and clay.
    SANDY CLAYSediment whose main phase is clay, but with significant sand.
    SANDY SILTSediment whose main phase is silt, but with significant sand.
    SILTSediment whose main phase is less than 0.0625 mm, but greater than or equal to 0.004 mm.
    SILTY CLAYSediment whose main phase is clay, but with significant silt.
    SILTY SANDSediment whose main phase in sand, but with significant silt.
    MUDSediment whose main phase is less than 0.0625 mm
    MUDDY SANDSediment whose main phase is sand, but with significant silt and clay.

    Character string of width 19.

    MEDIAN
    Middle point in the grain size distribution in phi units. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-7.35
    Maximum:10.74
    Units:phi
    Resolution:.01

    MEAN
    Average value in the grain size distribution in phi units. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-5.93
    Maximum:10.62
    Units:phi
    Resolution:.01

    STDEV
    Standard deviation (root mean square of the deviations) of the grain size distribution in phi units (sorting). No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:6.43
    Units:phi
    Resolution:.01

    SKEWNESS
    Skewness (deviation from symmetrical form) of the grain size distribution in phi units. No data value -9999. Calculated values less than -50 and greater than 50 have been set to -9999 as they are erroneous. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-14.78
    Maximum:37.19
    Units:phi
    Resolution:.01

    KURTOSIS
    Kurtosis (degree of curvature near the mode) of the grain size distribution in phi units. No data value -9999. Calculated values less than -50 and greater than 50 were set to -9999 as they are erroneous. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-49.56
    Maximum:49.98
    Units:phi
    Resolution:.01

    MODE1CLASS
    Mode 1 class - First mode (particle size that occurs the most number of times) in phi units. Although values are reported from -5 phi to 11 phi, older datasets recorded values beyond this range and modes can occur outside this range. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-7.500
    Maximum:10.600

    MODE1FREQ
    Mode 1 strength - Modal strength of the first mode in percent. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    MODE2CLASS
    Mode 2 class - Second mode in phi units. Although values are reported from -5 phi to 11 phi, older datasets recorded values beyond this range and modes can occur outside this range. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-7.50
    Maximum:13.40
    Units:phi
    Resolution:.01

    MODE2FREQ
    Mode 2 strength - Modal strength of the second mode in percent. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:60.50
    Units:percent
    Resolution:.01

    MODE3CLASS
    Mode 3 class - Third mode in phi units. Although values are reported from -5 phi to 11 phi, older datasets recorded values beyond this range and modes can occur outside the range. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:-6.50
    Maximum:15.40
    Units:phi
    Resolution:.01

    MODE3FREQ
    Mode 3 strength - Modal strength of the third mode in percent. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:18.15
    Units:percent
    Resolution:.01

    NMODES
    Number of modes. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:1
    Maximum:5
    Units:integer count
    Resolution:1

    PHIM5
    -5 Phi - Weight percent of the sample in the -5 Phi fraction and larger (nominal diameter of particles greater than or equal to 32 mm); very coarse pebbles, cobbles, and boulders. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    PHIM4
    -4 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    PHIM3
    -3 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:100.00
    Units:percent
    Resolution:.01

    PHIM2
    -2 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:64.43
    Units:percent
    Resolution:.01

    PHIM1
    -1 Phi - 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). No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:97.00
    Units:percent
    Resolution:.01

    PHI_0
    0 Phi - Weight percent of the sample in the 0 Phi fraction (nominal diameters of particles greater than or equal to 1 mm, but less than 2 mm); very coarse sand. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:86.00
    Units:percent
    Resolution:.01

    PHI_1
    1 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:92.67
    Units:percent
    Resolution:.01

    PHI_2
    2 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:96.00
    Units:percent
    Resolution:.01

    PHI_3
    3 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:95.92
    Units:percent
    Resolution:.01

    PHI_4
    4 Phi - Weight percent of the sample in the 4 Phi fraction (nominal diameters of particles greater than or equal to .0625 mm, but less than 0.125 mm); very fine sand. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:92.75
    Units:percent
    Resolution:.01

    PHI_5
    5 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:80.51
    Units:percent
    Resolution:.01

    PHI_6
    6 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:68.32
    Units:percent
    Resolution:.01

    PHI_7
    7 Phi - Weight percent of the sample in the 7 Phi fraction (nominal diameter of particles greater than or equal to 0.008 mm, but less than 0.016 mm); fine silt. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:47.57
    Units:percent
    Resolution:.01

    PHI_8
    8 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:47.90
    Units:percent
    Resolution:.01

    PHI_9
    9 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0
    Maximum:45.55
    Units:percent
    Resolution:.01

    PHI_10
    10 Phi - 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. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:59.53
    Units:percent
    Resolution:.01

    PHI_11
    11 Phi - Weight percent of the sample in the 11 Phi fraction and smaller (nominal diameter of particles less than 0.001 mm); fine clay. No data value -9999. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Range of values
    Minimum:0.00
    Maximum:87.3
    Units:percent
    Resolution:.01

    ANALYST
    Name (usually first initial and last name) of person who performed the grain size or physical properties analysis, if available. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    ANAL_COMM
    Comments on analyses - Any further information about sediment analysis for all or specific parameters in this table, if available. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    LITHOLOGY
    General lithologic description of sample (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    COMMENTS
    Comments on sample collection or lithology, if available. (Source: USGS East Coast Sediment Texture Database data dictionary)

    Character string of width 254.

    Entity_and_Attribute_Overview:
    Location and sediment analysis results for approximately 28,000 samples collected and analyzed by the U.S. Geological Survey, Woods Hole Coastal and Marine Science Center through March 2014. We caution users of this data that in a few samples from some of the older data (from groups 1 and 2), fraction weights and phi weight percents do not add up to 100 +/- 2 percent. This is noted for each affected sample in the Comments section.


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.

  3. To whom should users address questions about the data?

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov


Why was the data set created?

This ArcGIS shapefile contains the locations of marine sediment samples collected and (or) analyzed by the U.S. Geological Survey, Woods Hole Coastal and Marine Science Center starting in 1955 thru March 2014. Distribution of this dataset allows the user the ability to visualize the information in a Geographic Information System.


How was the data set created?

  1. From what previous works were the data drawn?

    ecstdb2014.xls (source 1 of 1)
    Type_of_Source_Media: online
    Source_Contribution:
    This Excel spreadsheet contains the accumulated results of the surficial sediment analysis collected and processed by the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC) through March 2014. Data collected from February 2011 through March 2014 were appended to the previously published ecstdb2011.xls spreadsheet. This file has been updated as errors in latitudes, longitudes, depths, and other information have been corrected for over 500 samples. Also, no data values of -9999 in the phi percents and gravel/sand/silt/clay percents have been changed to 0 for many samples in group 3 where it looked like the original blanks in the data should have been 0s (generally, if data was present for part of a coarse or fine fraction, then it was assumed that, based on USGS Woods Hole Sediment Laboratory analytical policy, all the phi classes in that coarse or fine fraction were analyzed and any no data values should be replaced with a 0). This combined spreadsheet was the source of the data that was converted into the Esri shapefile.

  2. How were the data generated, processed, and modified?

    Date: 2014 (process 1 of 2)
    Surficial sediment data from February 2011 through March 2014 were recorded in an Excel (version 2003) spreadsheet. This spreadsheet was appended to ecstdb2011.xls. Errors found in the ecstdb2011.xls data were corrected for approximately 500 samples and numerous no data values of -9999 in the phi percentages and gravel/sand/silt/clay percentages were replaced with 0s. No data values were replaced with 0s where it looked like a portion of either the fine or coarse fraction of the sample was analyzed and the original blanks should have been 0s. However, for instance, in some cases it looked like only the coarse fraction was analyzed and any sediment in the fine fraction was recorded as 5 phi, the finer phi sizes remained as no data values in this case. No data values were not changed to 0 in samples that were not analyzed at the Woods Hole Coastal and Marine Science Center Sediment Lab, or in samples in groups 1 or 2. Samples where the phi weight percents did not equal the appropriate gravel, sand, silt, and/or clay percents were normalized and run through GSSTAT. The Excel file was edited and a comma-delimited text file was generated. The Excel file was imported into ArcMap 9.3 to create a table with the Add XY Data tool.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Katherine McMullen
    Field and Laboratory Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov

    Data sources used in this process:
    • ecstdb2011.xls

    Data sources produced in this process:

    • Sheet1$ Events
    • ecstdb2014.txt

    Date: 2014 (process 2 of 2)
    The table was then converted to an ArcGIS shapefile (Data, Export Data) to be used as a GIS data layer using ArcMap 9.3.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Katherine McMullen
    Field and Laboratory Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov

    Data sources used in this process:
    • Sheet1$ Events

    Data sources produced in this process:

    • ecstdb2014.shp

  3. What similar or related data should the user be aware of?

    Poppe, L.J., Eliason, A.H., and Hastings, M.E., 2004, A Visual Basic program to generate sediment grain-size statistics and to extrapolate particle distributions: Computers and Geosciences v. 30, no. 7, p. 791-795.

    Online Links:

    Poppe, L.J., Eliason, A.H., and Hastings, M.E., 2003, A Visual Basic program to classify sediments based on gravel-sand-silt-clay ratios: Computers and Geosciences v. 29, no. 6, p. 805-809.

    Online Links:

    Poppe, L.J., and Eliason, A.H., 2008, A Visual Basic program to plot sediment grain-size data on ternary diagrams: Computers and Geosciences v. 34, p. 561-565.

    Online Links:

    Hathaway, J.C., Data file - Continental Margin Program, Atlantic coast of the United States: Woods Hole Oceanographic Institution Reference No. 71-15.


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?

    Positional accuracy varies due to different systems, datums, and navigational equipment used over the years.

  3. How accurate are the heights or depths?

    Positional accuracy varies due to different systems, datums, and navigational equipment used over the years. This information comes from the scientist and is sometimes incomplete.

  4. Where are the gaps in the data? What is missing?

    This dataset contains almost all the samples processed at the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC) Sediment Laboratory through March 2014, with the exception of those withheld at the request of the submitter (several hundred).

  5. How consistent are the relationships among the observations, including topology?

    No additional checks for topological consistency were performed on this data. A no data value of -9999 is used in number formatted columns where no data were collected or recorded. These cells were originally blank in the Excel file, but in an effort to prevent ArcGIS software from filling those blank cells with 0s in the shapefile, a no data value was added to all blank numerical cells. Many of the no data values were then changed to 0s in the phi percents and gravel/sand/silt/clay percents where it looked like a full coarse (sand and gravel) or fine (silt and clay) analysis was completed and the original blanks likely should have been 0s.


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:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

  1. Who distributes the data set? (Distributor 1 of 3)

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    These data are available in Environmental Systems Research Institute (Esri) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcGIS Explorer, capable of displaying the data is available from Esri at www.esri.com. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. These data are also available in Microsoft Excel 2003 spreadsheet format. The user must have software capable of reading or importing the Excel-formatted data file. These data are also available as a generic ASCII formatted data file. The user must have a software program capable of reading the comma-delimited data file.


  1. Who distributes the data set? (Distributor 2 of 3)

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2314 (voice)
    (508) 457-2310 (FAX)
    lpoppe@usgs.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    These data are available in Environmental Systems Research Institute (Esri) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcGIS Explorer, capable of displaying the data is available from Esri at www.esri.com. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. These data are also available in Microsoft Excel 2003 spreadsheet format. The user must have software capable of reading or importing the Excel-formatted data file. These data are also available as a generic ASCII formatted data file. The user must have a software program capable of reading the comma-delimited data file.


  1. Who distributes the data set? (Distributor 3 of 3)

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    These data are available in Environmental Systems Research Institute (Esri) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcGIS Explorer, capable of displaying the data is available from Esri at www.esri.com. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. These data are also available in Microsoft Excel 2003 spreadsheet format. The user must have software capable of reading or importing the Excel-formatted data file. These data are also available as a generic ASCII formatted data file. The user must have a software program capable of reading the comma-delimited data file.


Who wrote the metadata?

Dates:
Last modified: 14-May-2014
Metadata author:
Katherine McMullen
U.S. Geological Survey
Field and Laboratory Technician
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2277 (voice)
(508) 457-2310 (FAX)
kmcmullen@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.8.25 on Wed May 14 09:43:02 2014