Location and analysis information of vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_CoreLocations, points)

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Frequently anticipated questions:


What does this data set describe?

Title:
Location and analysis information of vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_CoreLocations, points)
Abstract:
In 2007, the U.S. Geological Survey collected 24 vibracores within Apalachicola Bay, Florida. The vibracores were collected using a Rossfelder percussive (P-3) electric 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 information of vibracores collected by the U.S. Geological Survey within Apalachicola Bay, Florida, 2007 (APP-07_CoreLocations, 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: -84.831367
    North_Bounding_Coordinate: 29.727917
    South_Bounding_Coordinate: 29.605850
  3. What does it look like?
    http://pubs.usgs.gov/of/2009/1031/images/core_loc.jpg (JPEG)
    Vibracore 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 (24)
    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_CoreLocations
    ESRI point shapefile representing the location of 24 vibracores that were collected within Apalachicola 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:29.727917
    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:-84.831367
    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:-3.75
    Maximum:-1.87
    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)
    Range of values
    Minimum:5
    Maximum:28
    Units:integer
    Resolution:1
    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:263
    Maximum:547
    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) Information unavailable from original metadata.
    LOCATION
    Geographic area within Apalachicola Bay of core collection (Source: U.S. Geological Survey) Character string
    CORE_PHOTO
    YES or NO, is there a photograph of the core collected (Source: U.S. Geological Survey) Character string
    PHOTO_FILE
    relative path to core photograph (Source: U.S. Geological Survey) Character string
    FIELD_DESC
    YES or NO, is there a field description or log sheet of the core collected (Source: U.S. Geological Survey) Character string
    FIELD_FILE
    relative path to field description file (log sheet) (Source: U.S. Geological Survey) Character string
    SUMM_DESC
    YES or NO, is there a summary description of the core collected (Source: U.S. Geological Survey) Character string
    SUMM_FILE
    relative path to summary description file (Source: U.S. Geological Survey) Character string
    CHIRP_LINE
    seismic trackline associated with the core location (Source: U.S. Geological Survey) Character string
    CHIRP_FILE
    relative path to seismic image with core location embedded (Source: U.S. Geological Survey) Character string
    C14_DATE
    YES or NO, is there a radiocarbon age date associated with the core (Source: U.S. Geological Survey) Character string
    NUM_DATES
    Total number of radiocarbon dates collected on core (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:9
    Units:integers
    Resolution:1
    DATE_FILE
    relative path to the radiocarbon age data (Source: U.S. Geological Survey) Character string
    GRAIN_SIZE
    YES or NO, is there a grain-size analysis report associated with the core (Source: U.S. Geological Survey) Character string
    NUM_SAMP
    Total number of grain-size analyses performed on core (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:21
    Units:integers
    Resolution:1
    GS_FILE
    relative path to the grain-size analysis data (Source: U.S. Geological Survey) Character string
    MICROFOSSL
    YES or NO, is there a microfossil count-analysis report associated with the core (Source: U.S. Geological Survey) Character string
    NUM_COUNTS
    Total number of microfossil count-analyses performed on core (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:20
    Units:integers
    Resolution:1
    MICRO_FILE
    relative path to the microfossil data (Source: U.S. Geological Survey) Character string
    COMMENTS
    Additional core information, including color and texture information (Source: U.S. Geological Survey) Character string
    Entity_and_Attribute_Overview:
    All data and fields within this file are related to whole-core determinations. For individual samples within the core, related to radiocarbon age, grain-size, or microfossil data, please refer to that sample-based file within the data catalog.
    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 textural information for 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?
    U.S. Geological Survey (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 electric percussive (P-3) 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, deployed, 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. 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. 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). Wood fragments and shells were collected within select vibracores for Radiocarbon age analysis. In total 34 radiocarbon ages were produced from wood fragments and shells in 10 of the 24 vibracores. Wood and shell samples were converted to graphite targets at a U.S. Geological Survey laboratory in Reston, VA, and the AMS 14C ages were determined on these targets at the Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory in Livermore, CA. The age results were recorded in a spreadsheet including: core id, top of sample, base of sample, material dated, delta 13C, 14C age, and age error. All dates were 14C dates and had no corrections applied to them. Microfossil samples were collected within select vibracores for foraminiferal analysis. In total of 95 microfossil samples were selected from 8 of the 24 vibracores. Each ~1-cm sediment sample for faunal analyses was processed at the USGS Foraminiferal Research Laboratory in St. Petersburg, FL, without additional drying. The sediment was placed in a 500 ml beaker containing 250 ml water and ~10 ml of 5 percent Calgon solution and agitated for less than 60 minutes. Fines were removed by washing the samples over a 63µm sieve, and then placing the residue in a low-temperature oven to dry (< 60° C). The dried fraction was sieved at 125µm, and split as necessary using a microsplitter to obtain approximately 100-200 specimens. Using a binocular stereo microscope to view the sample, foraminifers were removed from the sample using a wet brush, placed on a glued 60 square slide, sorted and identified using standard literature. In order to give the vibracores greater stratigraphic context, seismic images and trackline data from the geophysical surveys completed in 2005 and 2006 are included in this report (Twichell and others 2006). The original seismic trackline shapefile was edited to include only the tracklines that were adjacent to vibracore sites. The seismic-reflection profiles corresponding to the adjacent tracklines were included as JPEG images with the approximate vibracore locations and lengths shown on the seismic lines. Depths on the seismic profiles are shown in two-way travel time, and core lengths were converted to travel time assuming a speed of sound in water and sediment of 1500 m/sec. Final figures for each of the 24 vibracores were produced after the field descriptions, core photographing, and grain-size, microfossil, and age date sampling were complete. These summary sheets are expanded and polished versions of the original core field descriptions. Each core summary sheet is a stratigraphic representation of the vibracore with standardized legends representing core lithology and grain-size and age-data when available. The grain-size information is shown to the right of the core log as mean grain size (except for core 19 which shows percent sand) and age dates in uncorrected 14C years are shown to the left of the core log.
  2. How were the data generated, processed, and modified?
    Date: 2007 (process 1 of 8)
    Core locations from the ship DGPS system were recorded in a spreadsheet (Microsoft Office Excel 2003) along with water depth information, field notes, cruise information, core length, and a short description of the relative geographic area. Person who carried out this activity:
    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
    Date: 2009 (process 2 of 8)
    Vibracore 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 8)
    Additional fields were added to the point shapefile and populated. These additional fields contain information regarding the subsampling procedures conducted on the core including any radiocarbon age, microfossil, or grain-size data. Other fields include information on presence, absence, and location of core photographs, seismic profiles, core field descriptions and summary sheets. The CHIRP_LINE attribute field indicates the name of the seismic trackline associated with the Seismic_cores_INT.shp file, whereas the CHIRP_FILE attribute field indicates the relative path to the seismic-reflection profile jpeg image with the core depth indicated. 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: 2009 (process 4 of 8)
    The final vibracore 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 5 of 8)
    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.). The link to the data in the Identification_Information section had to be fixed. Information that was in the altitude system definition was moved to the depth system definition (encoding method), and the altitude system definition was removed. 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 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?
    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 locations 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.
  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 whole-core determinations. Data related to sub-samples derived from the vibracore 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 vibracore locations within Apalachicola Bay, Florida and the associated metadata. in format Shapefile (version ArcGIS 9.3) Size: 0.06
      Network links: http://pubs.usgs.gov/of/2009/1031/data_catalog/Core_Locations/App-07_Vibracores.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)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2009-1031/APP-07_CoreLocations.shp.faq.html>
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