Core descriptions and sand bed thickness data from Kahana Valley, O'ahu, Hawai'i

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Frequently anticipated questions:

What does this data set describe?

Title:
Core descriptions and sand bed thickness data from Kahana Valley, O'ahu, Hawai'i
Abstract:
This portion of the data release contains information on cores that were collected by the U.S. Geological Survey in Kahana Valley, O'ahu, Hawaii in 2015 and 2017. Sites were cored in order to describe wetland stratigraphy and to identify potential tsunami deposits. These cores contain mud, peat, fluvial sands, and marine carbonate sands, reflecting deposition in a variety of coastal environments. PDF files describe twenty-four (24) gouge and ‘Russian’ cores (hand held, side-filling peat augers) that were collected and described in the field. Cores collected in 2017 were described using the Troels-Smith sediment classification scheme (Troels-Smith, 1955; Nelson, 2015). Another pdf file (Kahana_cores_legend.pdf) contains a core-log legend. A comma-delimited text file (Kahana_sand_thickness.csv) includes tabulated information on the depth and thickness of sand bed K1. In addition, a shapefile (kahana_cores_locations.shp) provides sample locations of the vibracores.
Supplemental_Information:
Information about the data collection field activities can be found at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-639-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-609-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    SeanPaul M. La Selle, Richmond, Bruce M., Griswold, Frances R., Lunghino, Brent D., Jaffe, Bruce E., Kane, Haunani H., Bellanova, Piero, Arcos, Maria E.M., Nelson, Alan R., Chague, Catherine, Bishop, James M., and Gelfenbaum, Guy R., 2019, Core descriptions and sand bed thickness data from Kahana Valley, O'ahu, Hawai'i: data release DOI:10.5066/P9X4STJM, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    SeanPaul M. La Selle, Richmond, Bruce M., Griswold, Frances R., Lunghino, Brent D., Jaffe, Bruce E., Kane, Haunani H., Bellanova, Piero, Arcos, Maria E.M., Nelson, Alan R., Chague, Catherine, Bishop, James M., Nelson, Alan R., and Gelfenbaum, Guy R., 2019, Core logs, scans, photographs, grain-size, and radiocarbon data from coastal wetlands on the Hawaiian islands of Kaua'i, O'ahu, and Hawai'i: data release DOI:10.5066/P9X4STJM, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -157.88004
    East_Bounding_Coordinate: -157.87271
    North_Bounding_Coordinate: 21.552958
    South_Bounding_Coordinate: 21.549959
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 12-May-2015
    Ending_Date: 23-Feb-2017
    Currentness_Reference:
    ground condition at the time the samples were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Portable Document Format (PDF), comma-delimited text, shapefile
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Data were collected in Kahana Valley, O'ahu, HI
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • 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 0.00001. Longitudes are given to the nearest 0.00001. 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 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    Kahana_cores_legend.pdf
    pdf file of symbols and abbreviations used in the Kahana core log descriptions (Source: Producer defined)
    Symbols and abbreviations used in Kahana core logs
    legend for core logs (Source: Producer defined) legend of symbols and abbreviations used in the core log descriptions
    pdf files of Kahana core log descriptions
    Description of header information in each core log pdf file. (Source: Producer defined)
    FAN
    USGS Coastal and Marine Geology Field Activity Number (Source: Producer defined)
    ValueDefinition
    2015-639-FAUSGS CMG Field Activity Number 2015-639-FA. Detailed information about the field activity may be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-639-FA
    2015-609-FAUSGS CMG Field Activity Number 2017-609-FA. Detailed information about the field activity may be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-609-FA
    Core ID
    Core identifier (Source: Producer defined) Unique identifier for the core given in the field
    Date
    Date of sample collection in mm/dd/yyyy format (Source: Producer defined)
    Range of values
    Minimum:05/12/2015
    Maximum:02/23/2017
    Units:Dates in mm/dd/yyyy format
    Latitude
    Latitude of core in decimal degrees (Source: Producer defined)
    Range of values
    Minimum:21.54996
    Maximum:21.55296
    Units:decimal degrees
    Longitude
    Longitude of sample in decimal degrees (Source: Producer defined)
    Range of values
    Minimum:-157.88004
    Maximum:-157.87271
    Units:decimal degrees
    Kahana_sand_thickness.csv
    Comma-delimited text file with depths and thicknesses of sand layers observed in cores in Kahana Valley, Oahu, HI. (Source: Producer defined)
    Site_id
    Name of site in LocalityYear-CoreID format, where LocalityYear is the first three letters of the field locality (KAH = Kahana) followed by the 2-digit year (15=2015; 17=2017), and CoreID is the unique name given to a core. (Source: producer defined) Unique identifier for the site given in the field
    Latitude
    Latitude of sample in decimal degrees, north (Source: producer defined)
    Range of values
    Minimum:21.54996
    Maximum:21.55296
    Units:decimal degrees
    Longitude
    Longitude of sample in decimal degrees, east (Source: producer defined)
    Range of values
    Minimum:-157.88004
    Maximum:-157.87271
    Units:decimal degrees
    Sample_type
    Type of coring device used to collect sediment and determine sand bed thicknesses. (Source: producer defined)
    ValueDefinition
    gouge coreSide-filling hand-operated peat-coring auger. Either 3 cm or 6 cm-diameter and 100 cm-long.
    Russian coreSide-filling hand operated peat-coring auger with a flap that traps sediment. 6 cm-diameter and 50 cm-long.
    SandK1_min_Depth_cm
    The minimum depth in centimeters of Sand K1 in the core (measured from the ground surface). NaN=sand bed was not observed in core (Source: Producer defined)
    Range of values
    Minimum:83
    Maximum:152
    Units:centimeters
    SandK1_max_Depth_cm
    The maximum depth in centimeters of Sand K1 in the core (measured from the ground surface). NaN=sand bed was not observed in core (Source: Producer defined)
    Range of values
    Minimum:87.5
    Maximum:155
    Units:centimeters
    SandK1_thickness_cm
    The thickness of Sand K1 in the core. NaN=sand bed was not observed in core (Source: Producer defined)
    Range of values
    Minimum:1
    Maximum:14
    Units:centimeters
    kahana_cores_locations.shp
    point shapefile of Kahana core sample locations (Source: Producer defined)
    Core_ID
    Unique identifier for the core given in the field (Source: Producer defined) Unique identifier for the core given in the field
    Latitude
    Latitude of core in decimal degrees (Source: Producer defined)
    Range of values
    Minimum:21.54996
    Maximum:21.55296
    Units:decimal degrees
    Longitude
    Longitude of sample in decimal degrees (Source: Producer defined)
    Range of values
    Minimum:-157.88004
    Maximum:-157.87271
    Units:decimal degrees

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • SeanPaul M. La Selle
    • Bruce M. Richmond
    • Frances R. Griswold
    • Brent D. Lunghino
    • Bruce E. Jaffe
    • Haunani H. Kane
    • Piero Bellanova
    • Maria E.M. Arcos
    • Alan R. Nelson
    • Catherine Chague
    • James M. Bishop
    • Guy R. Gelfenbaum
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA
    United States

    831-460-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

This dataset was collected in order to identify evidence of tsunami inundation in Kahana Valley, O'ahu.

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: 2017 (process 1 of 2)
    Cores were collected between May 12, 2015 and February 23, 2017 and described in the field. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of cores.
    Date: 19-Oct-2020 (process 2 of 2)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 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?
    Troels-Smith, J., 1955, Karakterisering af lo se jordarter: Book Danmarks Geologiske Underso gelse Series IV. 3(10), 73 pp., Geological Survey of Denmark, Copenhagen, Denmark.

    Nelson, A., 2015, Chapter 4: Coastal Sediments: Book Handbook of Sea-level Research, Wiley-Blackwell, West Sussex, UK.

    Online Links:

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

  1. How well have the observations been checked?
    No formal attribute accuracy tests were conducted
  2. How accurate are the geographic locations?
    The locations of samples were determined using a Garmin eTrex 30x handheld global satellite navigation system (GNSS) receiver capable of receiving wide area augmentation system (WAAS) signals. The manufacturer reported accuracy for horizontal positions is 3-5 m while receiving WAAS signals.
  3. How accurate are the heights or depths?
    No formal positional accuracy tests were conducted.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted

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:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey (USGS) as the originator of the dataset and in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    U.S. Geological Survey
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? PDF files of core log descriptions and a legend, as well as a csv file of sediment thickness, and a shapefile containing core locations are downloadable in a single zip file that includes CSDGM FGDC-compliant metadata.
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    The 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. Other data are available in Portable Document Format (PDF) files. Adobe Acrobat and similar programs can be used to view files.

Who wrote the metadata?

Dates:
Last modified: 19-Oct-2020
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA
United States

831-460-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P9X4STJM/Kahana_cores_metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:17:34 2021