Surficial sediment samples collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE, 08016_SAMPLE.SHP)

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Frequently anticipated questions:


What does this data set describe?

Title:
Surficial sediment samples collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE, 08016_SAMPLE.SHP)
Abstract:
In 2008, the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC), in cooperation with the U.S. Army Corps of Engineers conducted a geophysical and sampling survey of the riverbed of the Upper St. Clair River between Port Huron, MI, and Sarnia, Ontario, Canada. The objectives were to define the Quaternary geologic framework of the St. Clair River to evaluate the relationship between morphologic change of the riverbed and underlying stratigraphy. This report presents the geophysical and sample data collected from the St. Clair River, May 29-June 6, 2008 as part of the International Upper Great Lakes Study, a 5-year project funded by the International Joint Commission of the United States and Canada to examine whether physical changes in the St. Clair River are affecting water levels within the upper Great Lakes, to assess regulation plans for outflows from Lake Superior, and to examine the potential effect of climate change on the Great Lakes water levels ( http://www.iugls.org). This document makes available the data that were used in a separate report, U.S. Geological Survey Open-File Report 2009-1137, which detailed the interpretations of the Quaternary geologic framework of the region. This report includes a description of the suite of high-resolution acoustic and sediment-sampling systems that were used to map the morphology, surficial sediment distribution, and underlying geology of the Upper St. Clair River during USGS field activity 2008-016-FA . Video and photographs of the riverbed were also collected and are included in this data release. Future analyses will be focused on substrate erosion and its effects on river-channel morphology and geometry. Ultimately, the International Upper Great Lakes Study will attempt to determine where physical changes in the St. Clair River affect water flow and, subsequently, water levels in the Upper Great Lakes.
  1. How might this data set be cited?
    U.S. Geological Survey, 2010, Surficial sediment samples collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 (ESRI VECTOR SHAPEFILE, 08016_SAMPLE.SHP): Open-File Report 2010-1035, 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.

    Denny, Jane F., Foster, David S., Worley, Charles R., and Irwin, Barry J., 2010, Geophysical data collected from the St. Clair River between Michigan and Ontario, Canada, 2008-016-FA: Open-File Report 2010-1035, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -82.423153
    East_Bounding_Coordinate: -82.404699
    North_Bounding_Coordinate: 43.012293
    South_Bounding_Coordinate: 42.975177
  3. What does it look like?
    https://pubs.usgs.gov/of/2010/1035/gis_catalog/seaboss/sample_sm.jpg (JPEG)
    Thumbnail image of sediment sample locations
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 03-Jun-2008
    Ending_Date: 04-Jun-2008
    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 (13)
    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?
    08016_sample
    ESRI shapefile (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    GROUP
    Number assigned to data based on source (Source: U.S. Geological Survey)
    ValueDefinition
    1Samples taken before start of the joint USGS/WHOI project
    2USGS/WHOI Atlantic Continental Margin Program stations
    3samples analyzed by the USGS Woods Hole Coastal and Marine Science Center
    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)
    Formal codeset
    Codeset Name:Unique identification number generated in the USGS sedimentation laboratory. Samples analyzed after 1980 consist of 2 characters and 3 numbers (e.g. AX131).
    Codeset Source:U.S. Geological Survey
    FIELD_NO
    Original sample information recorded in the field. (Source: U.S. Geological Survey) Original sample information recorded in the field. Format: ST1, where 'ST' is station, and '1' is the station number.
    PROJECT
    Name of the USGS project in which sediment samples were collected (Source: U.S. Geological Survey) USGS project identifier "St. Clair River"
    CONTACT
    USGS Project princple investigator (Source: U.S. Geological Survey) USGS Project principle investigator, DFOSTER (Dave Foster)
    AREA
    Geographical area in which sediment samples were collected (Source: U.S. Geological Survey) USGS Survey area where sediment samples were collected (St. Clair River, Michigan)
    LATITUDE
    Location of sample (WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:42.975177
    Maximum:43.012293
    Units:decimal degrees
    LONGITUDE
    Location of samples (WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-82.423153
    Maximum:-82.404699
    Units:decimal degrees
    DEPTH_M
    Water depth at sample location recorded from the ship's echosounder (Source: U.S. Geological Survey)
    Range of values
    Minimum:3.5
    Maximum:10.53
    Units:meters
    T_DEPTH
    Sample depth in sediment (cm) used for analyses. If not specifically noted, the samples are from the sediment surface, nominally including the top 2 cm. (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:0
    Units:meters
    B_DEPTH
    Sample depth in sediment (cm) used for analyses. (Source: U.S. Geological Survey)
    Range of values
    Minimum:5
    Maximum:5
    Units:meters
    DEVICE
    Sampling device (Source: U.S. Geological Survey) Sampling Device used.
    MONTH_COLL
    Month of data collection (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Month of the year
    Codeset Source:U.S. Geological Survey
    DAY_COLL
    Day of data collection based on Julian Day with day 1 equal to January 1 of 2008 (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Julian Day - day of calendar year with day 1 equal to January 1, 2008
    Codeset Source:U.S. Geological Survey
    YEAR_COLL
    Calendar year of data collection (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Calendar year
    Codeset Source:U.S. Geological Survey
    MONTH_ANAL
    Month of data analysis (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Month of the year
    Codeset Source:U.S. Geological Survey
    DAY_ANAL
    Day of data analysis (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Day of the month
    Codeset Source:U.S. Geological Survey
    YEAR_ANAL
    year of data analysis (Source: U.S. Geological Survey)
    Formal codeset
    Codeset Name:Calendar year
    Codeset Source:U.S. Geological Survey
    WEIGHT
    Dry mass (gm) of sample used in analysis (Source: U.S. Geological Survey)
    Range of values
    Minimum:24.5958
    Maximum:182.12
    Units:grams
    GRAVEL_PCT
    Percent gravel in sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:42.53
    Units:percent
    SAND_PCT
    Percent sand in sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:16.58
    Maximum:99.72
    Units:percent
    SILT_PCT
    Percent silt in sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.08
    Maximum:29.75
    Units:percent
    CLAY_PCT
    Percent clay in sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.01
    Maximum:50.76
    Units:percent
    CLASSIFICA
    Descriptive size classification according Shepard (1954) ternary classification system, as modified by Schlee, 1973). (Source: U.S. Geological Survey)
    ValueDefinition
    SandSediment grain size < 2mm and > 0.0062 mm
    Gravelly SedimentSediment grain size > 2mm and < 64 mm
    Clayey SandSediment containing 25 - 50% clay, < 20% silt and 50 - 75% sand
    Silty ClaySediment containing 50 - 75 % clay, <20% sand, 25- 50% silt.
    MEDIAN
    median size of sample (phi) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-0.2
    Maximum:8.04
    Units:phi
    MEAN
    mean size of sample (phi) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-0.15
    Maximum:7.15
    Units:phi
    STDEV
    Standard Deviation of sample (phi) (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.31
    Maximum:3.17
    Units:phi
    SKEWNESS
    Skewness of sample (unitless) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-1.1
    Maximum:4.73
    Units:unitless
    KURTOSIS
    Kurtosis of sample (unitless) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-0.78
    Maximum:186.1
    Units:unitless
    MODE1CLASS
    Mode 1 class - First mode (particle size that occurs the most number of times) in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    MODE1FREQ
    Mode 1 strength - Modal strength of the first mode in percent (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    MODE2CLASS
    Mode 2 class - Second mode in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    MODE2FREQ
    Mode 2 strength - Modal strength of the second mode in percent (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    MODE3CLASS
    Mode 3 class - Third mode in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    MODE3FREQ
    Mode 3 strength - Modal strength of the third mode in percent (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    NMODES
    Number of modes (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    no data value (-9999)Value not computed or available for sample
    PHIm5
    -5 Phi - Weight percent of the sample in the -5 phi fraction (nominal diameter of particles greater than or equal to 32 mm, but less than 64 mm); very coarse pebbles (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    PHIm4
    -4 Phi - Weight percent of the sample in the -4phi fraction (nominal diameter of particles greater than or equal to 16 mm, but less than 32 mm); coarse pebbles (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:7.21
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:7.35
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:12.23
    Units:percent
    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) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:15.74
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:9.31
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.04
    Maximum:12
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.83
    Maximum:51.98
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:5.6
    Maximum:87.07
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.07
    Maximum:45.15
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.03
    Maximum:3.54
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:5.15
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:11.33
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:15.48
    Units:percent
    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 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:17.14
    Units:percent
    PHI_10
    10 Phi - Weight percent of the sample in the 10 fraction (nominal diameter of particles greater than or equal to 0.001 mm, but less than 0.002 mm); medium clay (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:17.68
    Units:percent
    PHI_11
    11 Phi - Weight percent of the sample in the 11 phi fraction (nominal diameter of particles greater than or equal to 0.5 µm, but less than 0.001 mm); fine clay (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:15.94
    Units:percent
    ANALYST
    Name (usually first initial and last name) of person who performed the grain size or physical properties analysis (Source: USGS East Coast Sediment Texture Database data dictionary) chacter set
    ANAL_COMM
    Comments on analyses - Any further information about sediment analysis for all or specific parameters in this table (Source: USGS East Coast Sediment Texture Database data dictionary) chacter set
    LITHOLOGY
    General lithologic description of sample (Source: USGS East Coast Sediment Texture Database data dictionary) chacter set
    COMMENTS
    Comments on sample collection or lithology (Source: USGS East Coast Sediment Texture Database data dictionary) chacter set
    Cruise_ID
    Unique USGS Cruise Identification (Source: U.S. Geological Survey)
    ValueDefinition
    08016USGS Cruise Identification, where the first two numbers indicate year of data collection, and the last three numbers indicate the USGS cruise number for a given calendar year
    Entity_and_Attribute_Overview:
    The order of the fields within the comma-separated value (*.csv) file is the same as within the shapefile.
    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)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

Why was the data set created?

This data set includes the locations, identifiers, grain-size descriptions of surficial sediment samples collected at 13 stations within the St. Clair River between Michigan and Ontario, Canada during USGS Cruise 08016. The sediment samples were collected in order to ground-truth geophysical data and characterize the surficial sediment distribution of the riverbed.

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: 2008 (process 1 of 8)
    Video and digital photographs were collected at 37 stations using the USGS Mini SEABOSS (Blackwood and Parolski, 2001). Mini SEABOSS stations were selected based on preliminary acoustic-backscatter mosaics, with the objective of characterizing broad areas of different backscatter intensity. With the Mini SEABOSS deployed, the research vessel was allowed to drift with occasional power from the vessel to control drift direction. Continuous video was collected over a total of 11.5 km of lake and riverbed. Video drift position was derived from the HYPACK® navigation files based on the start and end times of the drift. For some portions of the drift, there was no navigation, so the position was derived from the time and position stamp in the video at 30-s intervals.
    The mini-SEABOSS is housed with a Minolta CO., LTD, DiMAGE 7Hi camera. The full resolution of the acquired images is 2560 x 1920 pixels.
    Grab samples of the surficial sediment were collected at 15 stations, typically at the end of a drift. The upper 2 cm of sediment was scraped from the surface of the sample for texture analysis. Sediment samples were collected at locations with relatively fine-grained sediment (sand or mud). Samples were not collected in gravel or cobble areas where gravel prevented full closure of the sampler and resulted in a washed-out sample.
    A total of 13 bottom samples were submitted for grain-size analysis. Two partially recovered, washed-out samples were not submitted. Grain-size analysis was performed at the USGS Sediment Laboratory at WHCMSC using methods described by Poppe and others (2005).
    Date: 2008 (process 2 of 8)
    Grab samples were collected with the mini SEABOSS (Blackwood and Parolski, 2001) at thirteen stations within the St. Clair River. Fifteen locations were occupied, but samples were successfully collected at thirteen; two locations were too coarse to sample. The upper 2 cm of sediment was scraped from the surface of the sample for texture analysis. Thirteen samples were submitted for grain-size analysis at the USGS Sediment Laboratory at the Woods Hole Coastal and Marine Science Center using methods described by Poppe and others (2005).
    Sample locations for sample 1 and 2 were read from the video time stamp, as HYPACK navigation was not available. The position information at the end of the video drift was used as position of the sample. (Samples were acquired at the end of video drifts). Person who carried out this activity:
    Jane F. Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508 548-8700 x 2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov
    Date: 2008 (process 3 of 8)
    Results from the grain-size analysis were delivered in a Microsoft 2004 Excel spreadsheet. The spreadsheet was saved as a comma separated value (*csv) file. Person who carried out this activity:
    Jane F Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508 548-8700 x 2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov
    Date: 2009 (process 4 of 8)
    The *csv file was imported to ArcGIS 9.2 using Tools- Add XY data. An event theme was created. The event theme was saved as a shapefile and the projection was defined as Geographic Coordinate System, WGS84. Person who carried out this activity:
    Jane F. Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508 548-8700 x 2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov
    Date: 18-Oct-2017 (process 5 of 8)
    Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). The link to the data in the Distribution_Information section had to be fixed. Attempted to modify http to https where appropriate. Reordered the links in the identification section to have a landing page link as the first link. Moved the minimal source information provided to make it the first process step. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. Added the distribution format CSV to account for the CSV file in the zip file. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 6 of 8)
    USGS Thesaurus keywords added to the keyword section. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 18-Nov-2019 (process 7 of 8)
    Crossref DOI link was added as the first link in the metadata. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 08-Sep-2020 (process 8 of 8)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Foster, David S., and Denny, Jane F., 2009, Quaternary Geologic Framework of the St. Clair River between Michigan and Ontario, Canada: Open-File Report 2009-1137, U.S. Geological Survey, Reston, VA.

    Online Links:

    D.Blackwood, and Parolski, K., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p. 39-43, Sea Technology, Arlington, Virginia.

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

    Online Links:

    Schlee, J., 1973, Atlantic continental shelf and slope of the United States -- sediment texture of the northeastern part: Professional Paper 529-L, U.S. Geological Survey, Reston, VA.

    Shepard, F.P., 1954, Nomenclature based on sand-silt-clay ratios: Journal Sedimentary Petrology: Journal of Sedimentary Petrology v. 24, p. 151-158, Society for Sedimentary Geology, Tulsa, Oklahoma.


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?
    Differential Global Positioning System (DGPS) navigation data were acquired with a Communications Systems International (CSI), Inc. LGBX Pro receiver. The CSI LGBX Pro received positions from a DGPS antenna located on the port, aft roof of the R/V Rafael cabin. DGPS positions were recorded within HYPACK (www.hypack.com) navigation software. Offsets between the DGPS antenna and the mini-SEABOSS were not measured. DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station (<http://www.navcen.uscg.gov/>). However, the horizontal position of the mini-SEABOSS during sample collection is assumed to be +/- 10 meters at best, due to a lack of precise positional data at the time of sample recovery.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Fifteen sample locations were occupied, however sediment samples were collected from only thirteen locations. Two locations contained primarily coarse grained sediment (gravel and/or cobble) and were too coarse to successfully sample with the mini-SEABOSS. Samples were attempted, but any sediment washed out before the instrument could be retrieved.
    Sample, photographic and video navigation for locations 1, 2 and e (up to time: 13:31) used navigation from the video time stamp, as navigation was not recorded in HYPACK. HYPACK navigation was available for sample 3 location.
  5. How consistent are the relationships among the observations, including topology?
    All sample data were collected with the mini-SEABOSS (SEABed Observation and Sampling System) by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada in 2008. The mini-SEABOSS is configured with a Van-Veen grab sampler to collect sediment samples of the riverbed.

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 as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2311 (voice)
    508-457-2310 (FAX)
    jdenny@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?
    • Availability in digital form:
      Data format: WinZip (version 9.0) file containing sediment sample data in ESRI shapefile and csv formats collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 in format Shapefile (version ArcGIS 9.2) Size: 1
      Network links: https://pubs.usgs.gov/of/2010/1035/gis_catalog/seaboss/sample.zip
      Data format: WinZip (version 9.0) file containing sediment sample data in ESRI shapefile and csv formats collected by the U.S. Geological Survey within the St. Clair River between Michigan and Ontario, Canada, 2008 in format CSV Size: 1
      Network links: https://pubs.usgs.gov/of/2010/1035/gis_catalog/seaboss/sample.zip
    • Cost to order the data: none

  5. What hardware or software do I need in order to use the data set?
    This zip file contains data 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 the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
    This zip file also contains data available in any software capable of reading comma-separated value files.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
U.S. Geological Survey
Attn: Jane F. Denny
Geologist
384 Woods Hole Road
Woods Hole, MA
USA

508-548-8700 x 2311 (voice)
508-457-2310 (FAX)
jdenny@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2010-1035/08016_sample.faq.html>
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