A method for obtaining and analyzing undisturbed oceanic sediment samples

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Frequently-anticipated questions:

What does this data set describe?

Title:
A method for obtaining and analyzing undisturbed oceanic sediment samples
Abstract:
"A German coring device (Reineck, 1958) has been improved to obtain oriented undisturbed cores at any depth of water. The samples are rectangular in shape, 8x12 inches in plan and a maximum of 18 inches high. Good cores have been obtained from clayey material as well as from gravelly sand. No disturbances due to coring were observed on the collected samples. These large samples make it possible to conduct many varieties of investigations, such as study of living organisms and shear strength measurements, as soon as the sample is on deck of a ship; radiography of slices, peeling and impregnation techniques, granulometry, mineralogy, porosity, fossil contents, etc. Construction and use of the box core and applications of some of these analytical techniques are described."
Supplemental_Information:
Data are included in the Deck41 compilation held at NGDC; samples in that compilation have been decommissioned in usSEABED. Data digitized by the USGS for inclusion into usSEABED (<http://walrus.wr.usgs.gov/usseabed>)
  1. How should this data set be cited?

    Bouma, Arnold H. , and Marshall, Neil F. , 1964, A method for obtaining and analyzing undisturbed oceanic sediment samples: Marine Geology Volume 2, pp. 81-99, Elsevier, Amsterdam, The Netherlands.

    Other_Citation_Details:
    Also cited as number 1780 of the Contributions from the Scripps Institution of Oceanography

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -117.62883
    East_Bounding_Coordinate: -117.32333
    North_Bounding_Coordinate: 32.92333
    South_Bounding_Coordinate: 32.22583

  3. What does it look like?

    Bouma_&_Marshall_1964 (.jpg)
    Sample distribution with coastline and bathymetry for reference.

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

    Calendar_Date: 1964
    Currentness_Reference: Publication date

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

    Geospatial_Data_Presentation_Form: Paper

  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 (12)

    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 0.00167. Longitudes are given to the nearest 0.00167. Latitude and longitude values are specified in Decimal degrees.

  7. How does the data set describe geographic features?

    Point
    SDTS point (Source: Source report)

    Sample number
    Sample number (Source: Source report)

    Alpha numeric code

    Water depth
    Water depth (Source: Source report)

    Range of values
    Minimum:506
    Maximum:1570
    Units:Meters
    Resolution:1.0

    Depth of penetration
    Depth of sampler penetration (Source: Source report)

    Range of values
    Minimum:21.5
    Maximum:42
    Units:Centimeters
    Resolution:0.5

    Lithologic description
    Sample descriptions (Source: Source report)

    Written text

Who produced the data set?

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

  2. Who also contributed to the data set?

    Arnold H. Bouma at Scripps Institution of Oceanography for the collection and analysis of data. For inclusion into usSEABED: Digitization: Jane Reid (USGS); Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado).

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

    Scripps Institution of Oceanography
    9500 Gilman Drive
    La Jolla, CA 92093

    858-534-2830 (voice)

Why was the data set created?

Samples were collected as trials for the sampler.

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: Unknown (process 1 of 1)
    No information is given on the processing of the samples. Only simple descriptions are included in the report

    Person who carried out this activity:

    Scripps Institution of Oceanography
    9500 Gilman Drive
    La Jolla, CA 92093

    858-534-2830 (voice)

    Data sources produced in this process:
    • Bouma_&_Marshall_1964

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

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

  1. How well have the observations been checked?

    No estimate made for the accuracy of the data in the original report. Data digitized by the USGS and partners were visually compared to the source data, and corrected. Where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS.

  2. How accurate are the geographic locations?

    Navigational technique not given in paper. Positions given to tenths of minutes.

  3. How accurate are the heights or depths?

    Depth determination technique not given in paper. Depths given in fathoms and meters.

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

    Only those samples within the U.S. EEZ were digitized. Eighteen samples in the Gulf of California are not included. Orientation was not digitized.

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

    None available

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None. Report is available at libraries.
Use_Constraints: Cite Arnold Bouma and Neil Marshall as originators of the data.

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

    Elsevier Publishing
    P.O. Box 945
    New York, NY 10159-0945

    212-633-3730 (voice)

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

    Marine Geology v.2 1964

  3. What legal disclaimers am I supposed to read?

    Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies.

  4. How can I download or order the data?

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

    None

Who wrote the metadata?

Dates:
Last modified: 2005
Metadata author:
U.S. Geological Survey
c/o Jane A. Reid
Geologist
400 Natural Bridges Drive
Santa Cruz, CA 95060

831-427-4727 (voice)
jareid@usgs.gov

Contact_Instructions: Email preferred
Metadata standard:
CSDGM Version 2 (FGDC-STD-001-1998)

Generated by mp version 2.8.17 on Tue May 16 20:21:08 2006