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

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

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:

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

   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)
   • Kevin M. Orzech
   • Wendy E. Dahl
   • Brian D. Edwards

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?
   • Availability in non-digital form:

     Report is available through the USGS; available online at: <http://pubs.er.usgs.gov/pubs/ofr/ofr01107>

   • Cost to order the data: None

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)