Location and analysis of grain-size data sampled from vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_GrainSize, points)

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Frequently anticipated questions:


What does this data set describe?

Title:
Location and analysis of grain-size data sampled from vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_GrainSize, points)
Abstract:
In 2007, the U.S. Geological Survey collected 24 vibracores within Apalachicola Bay, Florida. The vibracores were collected using a Rossfelder electric percussive (P-3) vibracore system during a cruise on the R/V Gilbert. Selection of the core sites was based on a geophysical survey that was conducted during 2005 and 2006 in collaboration with the National Oceanic and Atmospheric Administration’s (NOAA) Coastal Services Center (CSC) and the Apalachicola Bay National Estuarine Research Reserve. Available data include the vibracore data logs and photographs, select seismic-reflection profiles (from the geophysical survey), and core-derived data including: grain size analyses, radiocarbon ages, microfossil counts, and sedimentological interpretations. The long-term goal of this study is to provide maps, data, and assistance to the Apalachicola Bay National Estuarine Research Reserve in their effort to monitor and understand the geology and ecology of Apalachicola Bay Estuary. These data will inform coastal managers charged with resource preservation.
  1. How might this data set be cited?
    U.S. Geological Survey, 2009, Location and analysis of grain-size data sampled from vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_GrainSize, points): Open-File Report 2009-1031, 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.

    Twichell, D., Pendleton, E., Poore, R., Osterman, L., and Kelso, K., 2009, Vibracore, Radiocarbon, Microfossil, and Grain-Size Data from Apalachicola Bay, Florida: Open-File Report 2009-1031, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -85.074083
    East_Bounding_Coordinate: -84.867917
    North_Bounding_Coordinate: 29.699533
    South_Bounding_Coordinate: 29.605850
  3. What does it look like?
    http://pubs.usgs.gov/of/2009/1031/images/gs_locs.jpg (JPEG)
    Grain-size sample locations within Apalachicola Bay, Florida
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 22-May-2007
    Ending_Date: 26-May-2007
    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 (117)
    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.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Mean lower low water
      Depth_Resolution: 0.5
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    APP-07_GrainSize
    ESRI point shapefile representing the location of 117 grain-size analyses produced from 10 vibracores that were collected within Aplachicola Bay, Florida in 2007. (Source: U.S. Geological Survey)
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    LAT_DD
    Latitude of core in decimal degrees (WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:29.60585
    Maximum:29.699533
    Units:signed decimal degrees
    Resolution:.00000001
    LON_DD
    Longitude of core in decimal degrees (WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-85.074083
    Maximum:-84.867917
    Units:signed decimal degrees
    Resolution:.00000001
    W_DEPTH_m
    water depth (meters) at core location (MLLW) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-3.72
    Maximum:-2.13
    Units:meters
    Resolution:.01
    CRUISE_ID
    ID associated with cruise aboard the R/V Gilbert of St. Petersburg, FL (Source: U.S. Geological Survey) Character string
    SITE_ID
    Identification number for planned vibracore sites (Source: U.S. Geological Survey) Character string
    CORE_ID
    ID name given to core based on cruise number and core site (Source: U.S. Geological Survey) Character string
    CORE_L_cm
    total length of core (cm) (Source: U.S. Geological Survey)
    Range of values
    Minimum:398
    Maximum:538
    Units:centimeters
    Resolution:0.5
    DATE_COLL
    Month, day, and year of core collection (DD-MON-YR) (Source: U.S. Geological Survey) Character string
    DEVICE
    Device used for core collection (Source: U.S. Geological Survey) Character string
    LOCATION
    Geographic area within Apalachicola Bay of core collection (Source: U.S. Geological Survey) Character string
    SAMPLE_ID
    ID name given to core sample based on cruise number, core site, and the location range of the same within the core (in cm) of the grain-size sample. (Source: U.S. Geological Survey) Character string
    SAM_TOP_cm
    top of grain-size sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:52
    Maximum:547
    Units:cm
    Resolution:0.5
    SAM_BOT_cm
    bottom of grain-size sample (Source: U.S. Geological Survey)
    Range of values
    Minimum:54
    Maximum:547
    Units:cm
    Resolution:0.5
    DATE_ANALY
    month, day, and year that the grain-size sample was analyzed (Source: U.S. Geological Survey) Character string
    DB_ID
    sediment database identifier at WHSC (Source: U.S. Geological Survey) Character string
    WEIGHT
    weight of dry sample (grams) (Source: U.S. Geological Survey)
    Range of values
    Minimum:3.1806
    Maximum:34.2371
    Units:grams
    Resolution:0.0001
    GRAVEL_PCT
    percentage of dry weight belonging to gravel fraction (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:0.01
    SAND_PCT
    percentage of dry weight belonging to sand fraction (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:0.01
    SILT_PCT
    percentage of dry weight belonging to silt fraction (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:0.01
    CLAY_PCT
    percentage of dry weight belonging to clay fraction (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:100
    Units:percent
    Resolution:0.01
    CLASSIFICA
    Sediment description based on a sedimentological definition (Source: U.S. Geological Survey)
    ValueDefinition
    SANDSediment whose main phase is <2 mm, but >0.062 mm
    SILTY SANDcediment whose main phase is sand, but with signficant silt also
    SAND SILT CLAYSediment whose main phase consists of sand, silt, and clay
    SILTY CLAYSediment whose main phase is clay (usually >50%), but with significant silt
    CLAYEY SANDSediment whose main phase is sand (usually >50%), but with significant clay
    CLAYEY SILTSediment whose main phase is silt (usually >50%), but with significant clay
    MEDIAN
    Middle point in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.53
    Maximum:8.49
    Units:phi
    Resolution:0.01
    MEAN
    average value in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:1.97
    Maximum:8.27
    Units:phi
    Resolution:0.01
    STDEV
    Standard Deviation of the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.91
    Maximum:3.56
    Units:phi
    Resolution:0.01
    SKEWNESS
    Deviation from symmetrical form of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.51
    Maximum:2.51
    Resolution:0.01
    KURTOSIS
    Degree of curvature near the mode of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.38
    Maximum:32.98
    Resolution:0.01
    PHIm5
    Weight percent of the sample in the -5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    PHIm4
    Weight percent of the sample in the -4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    PHIm3
    Weight percent of the sample in the -3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    PHIm2
    Weight percent of the sample in the -2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    PHIm1
    Weight percent of the sample in the -1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0.12
    Units:percent
    Resolution:0.01
    PHI_0
    Weight percent of the sample in the 0 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:18.32
    Units:percent
    Resolution:0.01
    PHI_1
    Weight percent of the sample in the 1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:21.08
    Units:percent
    Resolution:0.01
    PHI_2
    Weight percent of the sample in the 2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.07
    Maximum:58.05
    Units:percent
    Resolution:0.01
    PHI_3
    Weight percent of the sample in the 3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.25
    Maximum:63.34
    Units:percent
    Resolution:0.01
    PHI_4
    Weight percent of the sample in the 4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.72
    Maximum:44.76
    Units:percent
    Resolution:0.01
    PHI_5
    Weight percent of the sample in the 5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.11
    Maximum:10.34
    Units:percent
    Resolution:0.01
    PHI_6
    Weight percent of the sample in the 6 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.61
    Maximum:18.2
    Units:percent
    Resolution:0.01
    PHI_7
    Weight percent of the sample in the 7 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.55
    Maximum:25.0
    Units:percent
    Resolution:0.01
    PHI_8
    Weight percent of the sample in the 8 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.34
    Maximum:24.65
    Units:percent
    Resolution:0.01
    PHI_9
    Weight percent of the sample in the 9 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.26
    Maximum:20.87
    Units:percent
    Resolution:0.01
    PHI_10
    Weight percent of the sample in the 10 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.21
    Maximum:20.73
    Units:percent
    Resolution:0.01
    PHI_11
    Weight percent of the sample in the 11 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.15
    Maximum:18.98
    Units:percent
    Resolution:0.01
    ANALYST
    name of the grain-size analyst (Source: U.S. Geological Survey) Character string
    ANAL_COMM
    analysis comments; only populated for core 19 (settling tube) (Source: U.S. Geological Survey) Character string
    Entity_and_Attribute_Overview:
    Data within this file are related to grain-size subsamples from 13 vibracores. For whole-core determinations please refer to that file within the data catalog: APP-07_CoreLocations.
    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?
    David C. Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

Why was the data set created?

This data set contains spatial and grain-size information for 13 of the 24 vibracores collected by the U.S. Geological Survey during a 2007 cruise within Apalachicola Bay, Florida. These data are available in shapefile, CSV, and XLS format.

How was the data set created?

  1. From what previous works were the data drawn?
    USGS (source 1 of 1)
    U.S. Geological Survey, Unpublished Material, vibracores collected by the U.S. Geological Survey within Apalachicola Bay, FL.

    Type_of_Source_Media: paper
    Source_Contribution:
    Twenty-four vibracores were collected within Apalachicola Bay, Florida during May 2007. Vibracore sites were selected based on the identification of target areas. These target areas were chosen from the analysis of geophysical data collected during 2005 and 2006 in collaboration with the National Oceanic and Atmospheric Administration’s (NOAA) Coastal Services Center (CSC) and the Apalachicola Bay National Estuarine Research Reserve. The vibracores were collected using a Rossfelder percussive (P-3) electric vibracore system. The cores were collected in a 7.62 cm (3 in) diameter by 6.10 m (20 ft) long aluminum tube with a copper core catcher riveted to the bottom. The vibracoring rig was mounted, depolyed, and recovered on the port side of the R/V Gilbert. The ship was anchored from the bow and stern to maintain ship position as a hydraulic crane deployed and recovered the coring rig. Following recovery, the bottom of the core was capped with a plastic cap, water was drained from the top of the core barrel by drilling a hole in the aluminum tube immediately above the sediment/water interface, and the pipe was cut at the sediment/water interface. Each core was cut into one-meter sections (measuring down from the sediment/water interface) on the boat deck, the ends were capped, each section labeled, and stored on deck for transport. Core sections for all 24 vibracores were transported to the U.S. Geological Survey Florida Integrated Science Center (FISC) where the 1-meter core sections were split in half (lengthwise), described, and photographed in the FISC core laboratory. One half of each core section was preserved and archived in a clear plastic sleeve with the ends taped shut to minimize moisture loss. The other half, the working half, of the core was used for visual descriptions, photographs, and eventually sub-sampling. Visual core descriptions were recorded on field sheets that contained information regarding: cruise, core number, describer, general station location, lithologic units, sedimentary structures, biota, and a depiction of the stratigraphic column. The cores were photographed by aligning all sections of a vibracore abreast with depth indicators located between sections. After photographing, all core sections were wrapped in plastic sleeves with the ends taped shut to minimize moisture loss, and stored in labeled cardboard boxes in the FISC core repository.
  2. How were the data generated, processed, and modified?
    Date: 2007 (process 1 of 7)
    Sediment samples within select vibracores were collected at depth intervals for grain-size analysis. In total 117 grain-size analyses were conducted on samples from 13 of the 24 vibracores. Samples, approximately 2x2x2 cm in size, were collected away from the edges of the cores to minimize core disturbance and stored in labeled plastic bags. Grain-size analyses were completed in the Sediment Laboratory as the U.S. Geological Survey Woods Hole Science Center (WHSC). Grain-size results for the coarse fraction in all the cores was derived from sieving the >62 micron fraction. The fine-fraction (< 62 microns) was analysed by coulter counter, and in one case (core App07-19) a settling tube. Sample information was recorded in 44 fields in a spreadsheet (Microsoft Office Excel 2003). Information recorded includes: core location, core id, sample id, top of sample, base of sample, bulk weight, percent of sample in each 1-phi size, percent sand, sediment classification, analyst, skewness, kurtosis, and other sediment-related statistics (Poppe and others, 2005). Person who carried out this activity:
    Kate McMullen
    U.S. Geological Survey
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Date: 2009 (process 2 of 7)
    Vibracore location and grain-size information was exported from the spreadsheet (Microsoft Office Excel 2003) as a comma-separated value (CSV) file and imported to ArcCatalog (version 9.3) by right-clicking on the CSV file and selecting 'create feature class --> from XY table'. Parameters for the import are: X Field - longitude; Y Field - latitude; Z Field - water depth. This process created an ESRI point Z shapefile where each subsample from a vibracore is a unique record with sample specific attributes. The original depth value (Z) was recorded in the spreadsheet from the ship's fathometer (not tide corrected). This value was replaced in ArcGIS using XTools Pro (version 5.2) for ArcGIS desktop --> Table Operations -->Add X,Y,Z coordinates. Only the Z coordinate was added using z-values from the tide-corrected (MLLW) basemap: apbaybath25m. This created a vertical measue of water depth at each core location in meters below MLLW. Person who carried out this activity:
    Elizabeth A. Pendleton
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2259 (voice)
    (508) 457-2310 (FAX)
    ependleton@usgs.gov
    Date: 2009 (process 3 of 7)
    The final grain-size shapefile was exported to Microsoft Excel format (XLS) and Comma-Separated Value (CSV) format using ArcMap (version 9.3) and XTools Pro (version 5.2) for ArcGIS desktop. This final export to CSV and XLS format was done to include the ESRI generated fields in all formats of the data, and to correct the Z-value to MLLW in all files. Person who carried out this activity:
    Elizabeth A. Pendleton
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700 x2259 (voice)
    (508) 457-2310 (FAX)
    ependleton@usgs.gov
    Date: 01-Jul-2016 (process 4 of 7)
    Edits to the metadata were made to fix any errors that MP v 2.9.32 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.). Information that was in the altitude system definition was moved to the depth system definition (encoding method), and the altitude system definition was removed. Minor fixes to the attribute format for some attributes were needed. 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 Rd.
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 5 of 7)
    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 6 of 7)
    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 7 of 7)
    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?
    Twichell, D., Andrews, B., Edmiston, H., and Stevenson, W., 2007, Geophysical Mapping of Oyster Habitats in a Shallow Estuary; Apalachicola Bay, Florida: U.S. Geological Survey Open-File Report 2006-1381, U.S. Geological Survey, Reston, VA.

    Online Links:

    Poppe, L.J., Williams, S.J., and Paskevich, V.F., 2005, U.S. Geological Survey East-Coast sediment analysis: procedures, database, and GIS data.: U.S. Geological Survey Open-File Report 2005-1001, U.S. Geological Survey, Reston, VA.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    All attributes were checked to ensure that the data translation from spreadsheet to shapefile and back was correct.
  2. How accurate are the geographic locations?
    The vibracore location for these data were recorded from the ship's Differential Global Positioning System (DGPS); they are accurate to +/- 1 to 2 meters, horizontally. Additionally, the ship was anchored from the stern and bow during vibracore collection, and this configuration could create extra horizontal uncertainty. Core locations are assumed to be accurate within +/- 20 meters.
  3. How accurate are the heights or depths?
    The water depth value in the attribute table is taken from the 25-m Apalachicola Bathymetric grid included in this report. Please see the metadata file for apbaybath25m for more detailed vertical accuracy information.
  4. Where are the gaps in the data? What is missing?
    Navigation from ship GPS was used to generate this shapefile. All vibracores were collected from the R/V Gilbert using a Rossfelder vibracore. One vibracore was collected at each of the 23 predetermined locations, with the exception of site 18. Two cores were collected here because the first core (App07-18A) was recovered without a core catcher on the end, and several centimeters of the sample were lost. A second core was taken (App07-18B) at site 18, and both cores were processed and preserved. Of the 24 vibracores collected, 13 were selected for grain-size analysis. This file contains sample data from within these 13 selected vibracores. All grain-size analyses were completed in the Sediment Laboratory as the U.S. Geological Survey Woods Hole Science Center (WHSC). All the grain-size results for the coarse fraction in all the cores was derived from sieving the >62 micron (-5 phi to 4 phi) fraction. The fine-fraction (< 62 microns; 5 phi to 11 phi) was analysed by coulter counter for all cores with the exception of core 19 which was fine sampled using a settling tube because the fine fraction was overwhelming the coulter counter in this sample. This resulted in a difference in reporting statistics for core 19, which is evident in the attribute table (values of 999). Core 19 is lacking percent statistics for phi sizes 5 through 11. Refer to the percent silt (for cumulative percent of 5 phi to 8 phi) and percent clay (for cumulative percent of 9 phi to 11 phi) statistics instead. A null value of 999 is reported for core 19 in the following fields: Median, mean, stdev, skewness, kurtosis, phi_5, phi_6, phi_7, phi_8, phi_9, phi_10, and phi_11.
  5. How consistent are the relationships among the observations, including topology?
    Any spurious data points were removed during creation of the spreadsheet file. These data are related to centimeter-scale subsamples within vibracores collected by USGS in 2007. The whole-core determinations are located in a separate file.

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:
The 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)
    David C. Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@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: This WinZip (version 9.0) file contains a shapefile, a microsoft excel file, and a text file of grain-size sample data within Apalachicola Bay, Florida and the associated metadata. in format Shapefile (version ArcGIS 9.3) Size: 1.036
      Network links: http://pubs.usgs.gov/of/2009/1031/data_catalog/Grain_Size/App-07_GrainSize.zip
      Media you can order: DVD-ROM (Density 4.75 Gbytes) (format UDF)
    • 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) point shapefile (.shp), Microsoft Excel Spreadsheet (.xls), and comma separated text (.csv) format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the shapefile, Microsoft Excel 2003 or higher to read the XLS file, or any text-reading software will open the .csv 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.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA
USA

508-548-8700 x2259 (voice)
(508)-457-2310 (FAX)
ependleton@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

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