CSV and XLS tables of multi-sensor core logger data collected from 19 cores collected by the U.S. Geological Survey in 2008 from offshore Puerto Rico and the U.S. Virgin Islands

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Frequently anticipated questions:

What does this data set describe?

Title:
CSV and XLS tables of multi-sensor core logger data collected from 19 cores collected by the U.S. Geological Survey in 2008 from offshore Puerto Rico and the U.S. Virgin Islands
Abstract:
In 2008, as a collaborative effort between Woods Hole Oceanographic Institution and the U.S. Geological Survey, 20 giant gravity cores were collected from areas surrounding Puerto Rico and the U.S. Virgin Islands. The regions sampled have had many large earthquake and landslide events, some of which are believed to have triggered tsunamis. The objective of this coring cruise, carried out aboard the National Oceanic and Atmospheric Administration research vessel Seward Johnson, was to determine the age of several substantial slope failures and seismite layers near Puerto Rico in an effort to map their temporal distribution. Data gathered from the cores collected in 2008 and 11 archive cores from the Lamont-Doherty Earth Observatory are included in this report. These data include lithologic logs, core summary sheets, x-ray fluorescence, wet-bulk density, magnetic susceptibility, grain-size analyses, radiographs, and radiocarbon age dates.
Supplemental_Information:
For more information on the USGS cruise, please see https://cmgds.marine.usgs.gov/fan_info.php?fan=2008-008-FA
  1. How might this data set be cited?
    U.S. Geological Survey, 2014, CSV and XLS tables of multi-sensor core logger data collected from 19 cores collected by the U.S. Geological Survey in 2008 from offshore Puerto Rico and the U.S. Virgin Islands: Open-File Report 2014-1227, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Hoy, Shannon K., Chaytor, Jason D., and Uri S. ten Brink, 2014, Core Data From Offshore Puerto Rico and the U.S. Virgin Islands: Open-File Report 2014-1227, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -67.0795
    East_Bounding_Coordinate: -64.82283
    North_Bounding_Coordinate: 19.17558
    South_Bounding_Coordinate: 17.55293
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 18-Mar-2008
    Ending_Date: 24-Mar-2008
    Currentness_Reference:
    ground condition; cores collected in 2008
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    Information unavailable from original metadata.
    Information unavailable from original metadata. (Source: Information unavailable from original metadata.)
    SB_Depth
    Depth of core not corrected for erroneous data points caused by the beginning, middle, and end of cores (meters) (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:meters
    Core_Sect
    Core section being analyzed (Source: USGS)
    ValueDefinition
    1Section 1
    2Section 2
    3Section 3
    Sect_Depth
    Depth in centimeters within the section, starting from the top. Restarts count at new section. (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:centimeters
    CT
    Core Thickness in centimeters (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:centimeters
    Den1
    Wet bulk density of core in g/cm3 (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:grams per centimeter cubed
    MS1
    Magnetic susceptibility of core in SI (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:SI
    Depth_corrected
    Relative depth of core in centimeters corrected for erroneous data points and continuous among sections (Source: USGS)
    Range of values
    Minimum:Information unavailable from original metadata.
    Maximum:Information unavailable from original metadata.
    Units:centimeters
    Entity_and_Attribute_Overview:
    Although the core MSCL data are not geospatial, they are related to the core locations which are available in the PRcore_locations shapefile available from https://pubs.usgs.gov/of/2014/1227/data/1-CoreLocations/PRcore_locations.zip. The attributes listed belong to each of the 19 core table files (both CSV and XLS).
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Jason D. Chaytor
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700 x2351 (voice)
    (508) 457-2310 (FAX)
    jchaytor@usgs.gov

Why was the data set created?

To provide XLS and CSV files of multi-sensor core logger data from 19 cores collected during USGS Field Activity 2008-008-FA from offshore Puerto Rico and the U.S. Virgin Islands. There are separate tables for each individual core.

How was the data set created?

  1. From what previous works were the data drawn?
    GGC (source 1 of 1)
    U.S. Geological Survey, 2014, Core data from offshore Puerto Rico and the U.S. Virgin Islands: Open-File Report 2014-1227, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: physical samples
    Source_Contribution:
    The gravity cores collected during U.S. Geological Survey field activity 2008-008-FA. The Woods Hole Oceanographic Giant Gravity Corer (GGC) was used to collect the 20 cores in 2008. The gravity corer is a large diameter (10 centimeter) sampler that collects cores up to 6.5 meters in length. During field activity 2008-008-FA the corer was not rigged with liner longer than approximately 3 meters. Although cores were attempted at 40 core sites, core was recovered at only 20 sites. Seven additional sites yielded only samples (bagged) from the core catcher or cutting head. Of the 20 successful cores, three also have cutter/catcher bag samples.
  2. How were the data generated, processed, and modified?
    Date: 2008 (process 1 of 7)
    Each core was cut into sections on the ship after collection. The cores were then split into halves back onshore. Person who carried out this activity:
    Jason D. Chaytor
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2351 (voice)
    (508) 457-2310 (FAX)
    jchaytor@usgs.gov
    Data sources produced in this process:
    • Split_cores
    Date: unknown (process 2 of 7)
    Once back onshore physical properties were collected from the split sections of the SJ8 cores using a GEOTEK MSCL-S multi-sensor core logger. The cores were analyzed at ambient room temperature (20-25 degrees Celsius). Gamma-ray attenuation (wet-bulk density) and magnetic susceptibility were measured at 1-cm intervals for each core with a 10 second count time. Person who carried out this activity:
    Brian Buczkowski
    U.S. Geological Survey
    Geologic Samples Curator and Data Librarian
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2361 (voice)
    (508) 457-8700 (FAX)
    bbuczkowski@usgs.gov
    Data sources used in this process:
    • Split_cores
    Date: unknown (process 3 of 7)
    Data were compiled into individual tables for each core and exported as an XLS and a CSV. Person who carried out this activity:
    Shannon K. Hoy
    U.S. Geological Survey
    Research Associate
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2297 (voice)
    (508) 457-2310 (FAX)
    shoy@usgs.gov
    Date: 2013 (process 4 of 7)
    Erroneous data points caused by the beginning and end of sections were flagged by either marking the text red (XLS) or adding an (*) for the CSV table. Some lines had errors in only one parameter, these data points were flagged, but they were not considered erroneous, therefore they were not removed for corrected depth. Person who carried out this activity:
    Shannon K. Hoy
    U.S. Geological Survey
    Research Associate
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2297 (voice)
    (508) 457-2310 (FAX)
    shoy@usgs.gov
    Date: 03-Oct-2017 (process 5 of 7)
    Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added additional online links in the Identification section. The source information was incomplete and had to be modified to meet the standard. Fixed a link to data in the entity and attribute overview section. Minor fixes to the attribute format for some attributes were needed to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 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
    Date: 20-Jul-2018 (process 6 of 7)
    USGS Thesaurus keywords added to the keyword section. 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
    Date: 08-Sep-2020 (process 7 of 7)
    Added keywords section with USGS persistent identifier as theme keyword. 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?

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

  1. How well have the observations been checked?
    Attributes were double checked that file name was in fact the correct core that the data belonged to.
  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?
    These data represent all of the cores that were analyzed with the GEOTEK MSCL-S. 19 of the 20 2008-008-FA cores yielded usable MSCL data. There is MSCL data for core: 5, 7, 8, 9, 10, 12, 13, 17, 18, 20, 21, 22, 23, 24, 31, 33, 34, 38, and 40. The only core without MSCL data is 28GGC, this core had only about 7 cms of readable data, and therefore it was not included.
  5. How consistent are the relationships among the observations, including topology?
    The file naming convention is as follows: CCCC_mscl. CCCC stands for the core name which is ##GGC, GGC stands for giant gravity core. MSCL stands for multi-sensor core logger. There are 2 files for each core: an XLS and a CSV. The same data is in both tables, the only difference is that the CSV file marks erroneous data points with an (*) and the XLS table marks erroneous data points by putting the text in red. The core name is only marked in the file name, so take caution if renaming files.

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:
The Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    Jason D. Chaytor
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA

    (508) 548-8700 x2351 (voice)
    (508) 457-2310 (FAX)
    jchaytor@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  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 end user must be capable of uncompressing a zip file and reading an XLS or CSV table.

Who wrote the metadata?

Dates:
Last modified: 16-Nov-2021
Metadata author:
U.S. Geological Survey
Attn: Shannon Hoy
384 Woods Hole Road
Woods Hole, MA

(508) 548-8700 x2297 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2014-1227/2008PRcores_msclmeta.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:52 2021