Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MG, P2-95-MB, and P-1-97-MB

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Frequently-anticipated questions:


What does this data set describe?

Title:
Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MG, P2-95-MB, and P-1-97-MB
Abstract: No formal abstract is given.
Supplemental_Information:
Some data are duplicated in USGS OFR 97-450. Carbonate and organic carbon data from that report are included in this dataset. Data included in usSEABED (<http://walrus.wr.usgs.gov/usseabed>)
  1. How should this data set be cited?

    Orzech, Kevin M. , Dahl, Wendy E. , and Edwards, Brian D. , 2001, Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MG, P2-95-MB, and P-1-97-MB: Open-file report 01-107, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

    Other_Citation_Details:
    Data from USGS cruises M195MB (<http://walrus.wr.usgs.gov/infobank/m/m195mb/html/m-1-95-mb.meta.html>), P295MB (<http://walrus.wr.usgs.gov/infobank/p/p295mb/html/p-2-95-mb.meta.html>),and P197MB (<http://walrus.wr.usgs.gov/infobank/p/p197mb/html/p-1-97-mb.meta.html>.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -122.90817
    East_Bounding_Coordinate: -121.81850
    North_Bounding_Coordinate: 37.84330
    South_Bounding_Coordinate: 36.00170

  3. What does it look like?

    OFR_01-107 (JPG)
    Screen grab of GIS-produced sample distribution, with bathymetry and land for reference.

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

    Beginning_Date: 03-Apr-1995
    Ending_Date: 05-Sep-1997
    Currentness_Reference: Publication date

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

    Geospatial_Data_Presentation_Form: Digital

  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):

      • Point (411)

    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.

  7. How does the data set describe geographic features?

    Point
    SDTS point (Source: Source report)

    Sample number
    Sample number (Source: US Geological Survey)

    Alpha numeric number based on cruise and core information

    Subsample depth
    Depth of subsample within sample (top = 0) (Source: Source report)

    Range of values
    Minimum:0
    Maximum:0.9
    Units:Meters
    Resolution:0.01

    Gravel
    Amount of gravel in subsample (Source: Source report)

    Range of values
    Minimum:0
    Maximum:83.05
    Units:Percent
    Resolution:0.01

    Sand
    Amount of sand in subsample (Source: Source report)

    Range of values
    Minimum:1.55
    Maximum:99.99
    Units:Percent
    Resolution:0.01

    Silt
    Amount of silt in subsample (Source: Source report)

    Range of values
    Minimum:0.01
    Maximum:85.08
    Units:Percent
    Resolution:0.01

    Clay
    Amount of clay in subsample (Source: Source report)

    Range of values
    Minimum:0
    Maximum:54.86
    Units:Percent
    Resolution:0.01

    Mud
    Amount of mud in subsample (Source: Source report)

    Range of values
    Minimum:0.01
    Maximum:98.45
    Units:Percent
    Resolution:0.01

    Mean
    First moment of grain-size distribution (mean) (Source: Source report)

    Range of values
    Minimum:-0.75
    Maximum:8.59
    Units:Phi
    Resolution:0.01

    Sorting
    Second moment of grain-size distribution (standard deviation) (Source: Source report)

    Range of values
    Minimum:0.27
    Maximum:3.88
    Units:Phi
    Resolution:0.01

    Skewness
    Third moment of grain-size distribution (skewness) (Source: Source report)

    Range of values
    Minimum:-1.57
    Maximum:7.2
    Units:Unitless
    Resolution:0.01

    Kurtosis
    Fourth moment of grain-size distribution (kurtosis) (Source: Source report)

    Range of values
    Minimum:1.77
    Maximum:62.09
    Units:Unitless
    Resolution:0.01

    Granulometric analysis
    Analysis of grain-size into phi-sized bins (Source: Source report)

    Range of values
    Minimum:< -2 phi
    Maximum:> 11 phi
    Units:Percent
    Resolution:0.01

    Descriptions
    Written descriptions (Source: Source report)

    Photo and core descriptions including biota and estimates of ripple size


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?

    Kevin M. Orzech, Wendy E. Dahl, Brian D. Edwards at the United States Geological Survey for the collection and analysis of data. For usSEABED, formatting: Jane Reid (USGS);Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado)

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

    United States Geological Survey
    c/o Brian D. Edwards
    U.S. Geological Survey, MS 999
    Menlo Park, CA 94025

    1-650-329-5488 (voice)
    bedwards@usgs.gov


Why was the data set created?

In response to the 1992 creation of the Monterey Bay National Marine Sanctuary (MBNMS), the United States Geological Survey (USGS) initiated a multiyear investigation of the Sanctuary continental margin. As part of the investigative effort, this report summarizes the shipboard procedures, subsequent laboratory analyses, and data results from three seafloor sampling cruises conducted on the continental shelf between the Monterey peninsula, CA, and San Francisco, CA (fig. 1). The cruises were conducted in 1995 aboard the NOAA Ship McArthur (M-1-95-MB) and in 1995 and 1997 aboard the R/V Point Sur (P-2-95-MB and P-1-97-MB). Scientists and representatives from the Environmental Protection Agency (EPA), the National Oceanic and Atmospheric Administration (NOAA), the California Department of Fish and Game (CDFG), the University of California Santa Cruz (UCSC), and the San Jose State University Moss Landing Marine Laboratory (SJSU-MLML) supported the research effort.


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)
    <http://pubs.er.usgs.gov/pubs/ofr/ofr01107>. For inclusion in usSEABED, granulometric and statistical data were concatenated with unpublished core descriptions and photo descriptions. Additional carbonate and organic carbon data from OFR 97-450 (see metadata for that report) were concatenated as available.

  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?

    See report <http://pubs.er.usgs.gov/pubs/ofr/ofr01107>. 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?

    "Ship positioning was determined by differential GPS (accuracy 10 m);cores typically are obtained within 50 m of the predetermined sampling location."

  3. How accurate are the heights or depths?

    "Water depth at the time of sampling was determined by use of a 12-kHz acoustic profiler."

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

    See report <http://pubs.er.usgs.gov/pubs/ofr/ofr01107>. For inclusion into usSEABED, all data in the report were included.

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

    See report <http://pubs.er.usgs.gov/pubs/ofr/ofr01107>


How can someone get a copy of the data set?

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

Access_Constraints:
Report is available online in PDF format Adobe Acrobat Reader required to view.
Use_Constraints: Cite the U.S. Geological Survey as the originators of the data.

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

    United States Geological Survey
    USGS Information Services
    Denver, CO 80225

    1-800-ASK-USGS (voice)

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

    Open file report 01-107

  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 and limitations of the statistical data.

  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 Sun May 21 08:12:50 2006