Multi-Sensor Core Logger (MSCL) P-wave velocity and gamma-ray density whole-core logs of sediment cores collected in 2014 from the northern flank of Monterey Canyon, offshore California

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Frequently anticipated questions:


What does this data set describe?

Title:
Multi-Sensor Core Logger (MSCL) P-wave velocity and gamma-ray density whole-core logs of sediment cores collected in 2014 from the northern flank of Monterey Canyon, offshore California
Abstract:
This part of the data release includes Multi-Sensor Core Logger (MSCL) P-wave velocity and gamma-ray density whole-core logs of sediment cores collected in 2014 from the northern flank of Monterey Canyon, offshore California. It is one of five files in this U.S. Geological Survey data release that include data from a set of sediment cores acquired from the continental slope, north of Monterey Canyon, offshore central California. Vibracores and push cores were collected with the Monterey Bay Aquarium Research Institute’s (MBARI’s) remotely operated vehicle (ROV) Doc Ricketts in 2014 (cruise ID 2014-615-FA; http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-615-FA). One spreadsheet (NorthernFlankMontereyCanyonCores_Info.xlsx) contains core name, location, and length. One spreadsheet (NorthernFlankMontereyCanyonCores_MSCLdata.xlsx) contains Multi-Sensor Core Logger P-wave velocity and gamma-ray density whole-core logs of vibracores. One zipped folder of .bmp files (NorthernFlankMontereyCanyonCores_Photos.zip) contains continuous core photographs of the archive half of each vibracore. One spreadsheet (NorthernFlankMontereyCanyonCores_Radiocarbon.xlsx) contains radiocarbon sample information, results, and calibrated ages. One .pdf file (NorthernFlankMontereyCanyonCores_Figures.pdf) contains combined displays of data for each core, including graphic diagram descriptive logs. This particular metadata file describes the information contained in the file NorthernFlankMontereyCanyonCores_MSCL.xlsx. All vibracores are archived by the U.S. Geological Survey Pacific Coastal and Marine Science Center. Other remaining core material, if available, is archived at MBARI.
  1. How might this data set be cited?
    Maier, Katherine L., Paull, Charles K., McGann, Mary, Lundsten, Eve M., Anderson, Krystle, Gwiazda, Roberto, and Brothers, Daniel S., 2016, Multi-Sensor Core Logger (MSCL) P-wave velocity and gamma-ray density whole-core logs of sediment cores collected in 2014 from the northern flank of Monterey Canyon, offshore California: data release DOI:10.5066/F7J67F2K, U.S. Geological Survey, Coastal and Marine Geology Program, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Maier, Katherine L., Paull, Charles K., McGann, Mary, Lundsten, Eve M., Anderson, Krystle, Gwiazda, Roberto, and Brothers, Daniel S., 2016, Sediment core data from the northern flank of Monterey Canyon, offshore California: data release DOI:10.5066/F7J67F2K, U.S. Geological Survey, Coastal and Marine Geology Program, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.13103
    East_Bounding_Coordinate: -122.12469
    North_Bounding_Coordinate: 36.74724
    South_Bounding_Coordinate: 36.73757
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 2014
    Ending_Date: 2014
    Currentness_Reference:
    ground condition at the time the cores were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet (.xlsx file)
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: none
      This is a Point data set.
    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 WGS 84.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: water depth (depth below sea level)
      Depth_Resolution: 0.01
      Depth_Distance_Units: meters below sea level
      Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    Multi-Sensor Core Logger (MSCL) Data: Lab
    Table containing MSCL data for each core. (Source: producer defined)
    Depth in Core
    measured depth below top of core liner (Source: producer defined)
    Range of values
    Minimum:0.01
    Maximum:1.81
    Units:meters
    Date and Time
    Day/Month/Year Hour:Minute that MSCL measurement was taken (Source: producer defined)
    Range of values
    Minimum:28/4/2014 14:10
    Maximum:1/5/2014 13:02
    Units:day/month/year Hour(24):Minute
    Core Thickness
    diameter of core measured by the MSCL (Source: producer defined)
    Range of values
    Minimum:7.364
    Maximum:8.218
    Units:centimeters
    P-wave Amplitude
    measured P-wave amplitude (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    P-wave Velocity
    measured P-wave velocity (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:2367.656
    Units:meters per second
    Gamma-Ray Density
    measured gamma-ray density (Source: producer defined)
    Range of values
    Minimum:-0.3350
    Maximum:1.8433
    Units:grams per cc
    Imp
    impedance (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:3392.276
    Units:*10^3/(kilograms*meters^3)
    FP
    fractional porosity (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:1.7894
    Units:dimensionless
    Flagged for zero P-wave Amplitude
    identifies suspect P-wave velocity measurements (Source: producer defined)
    ValueDefinition
    *flagged P-wave velocity measurement because P-wave amplitude at zero
    no inputno measurement flagged; P-wave amplitude greater than zero
    Entity_and_Attribute_Overview:
    Multi-sensor core logger (MSCL) data are presented in a spreadsheet for nine vibracores, with one vibracore per spreadsheet tab. Depth in core is measured from the top of the core liner tube and presented in meters. Date and time of logging is given in day/month/year hour (24 hour):minute. Core thickness is measured for each 1-cm increment and given in centimeters. P-wave amplitude is a percentage between 0 and 100. Zero p-wave amplitude measurements are flagged as “*”. P-wave velocity is given in meters per second. Gamma-ray density is given in grams per cc. Acoustic impedance (Imp) is given in units *10^3/(kilograms*meters^3). Fractional porosity (FP) is a dimensionless term calculated from the gamma-ray density. Calibration (processing) parameters are presented for each core in the header information at the top of each tabbed sheet.
    Entity_and_Attribute_Detail_Citation:
    Multi-sensor core logs (MSCL) (for example, p-wave velocity and gamma-ray density logs) are available in the file NorthernFlankMontereyCanyonCores_MSCL.xlsx at:http://dx.doi.org/10.5066/F7J67F2K

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Katherine L. Maier
    • Charles K. Paull
    • Mary McGann
    • Eve M. Lundsten
    • Krystle Anderson
    • Roberto Gwiazda
    • Daniel S. Brothers
  2. Who also contributed to the data set?
    U.S. Geological Survey Pacific Coastal and Marine Science Center and Monterey Bay Aquarium Research Institute
  3. To whom should users address questions about the data?
    Katherine L. Maier
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA
    USA

    831-460-7461 (voice)
    kcoble@usgs.gov

Why was the data set created?

The sediment cores and subsequent core data were collected to investigate the San Gregorio Fault Zone and continental slope sedimentation.

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: 2014 (process 1 of 1)
    Vibracores and push cores were collected with the Monterey Bay Aquarium Research Institute’s remotely operated vehicle (ROV) Doc Ricketts in 2014. See cruise ID 2014-615-FA (http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-615-FA) for more information. The vibracores were multi-sensor core logged (MSCL) with a GEOTEK system at the U.S. Geological Survey Pacific Coastal and Marine Science Center laboratory in Menlo Park, California. All whole vibracores were logged at 1-cm intervals for P-wave velocity and gamma-ray density. Calibration was conducted during logging using a standard of the same core liner. Data presented are calibrated.
  3. What similar or related data should the user be aware of?
    Maier, K.L., Paull, C.K., Brothers, D.S., Caress, D.W., McGann, M., Lundsten, E.M., Anderson, K.A., and Gwiazda, R., 2017, Investigation of San Gregorio Fault Zone late Pleistocene and Holocene activity, offshore central California: Bulletin of the Seismological Society of America (in review), unknown.


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?
    No formal positional accuracy tests were conducted
  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?
    Data set 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 and Monterey Bay Aquarium Research Institute as the originator(s) 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
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    USA

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set?
  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?

Who wrote the metadata?

Dates:
Last modified: 08-Mar-2017
Metadata author:
Katherine L. Maier
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Research Geologist
2885 Mission Street
Santa Cruz, CA
USA

831-460-7461 (voice)
kcoble@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/monterey_bay/NorthernFlankMontereyCanyonCores_MSCL_Metadata.faq.html>
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