Undrained shear strength of sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA

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Frequently anticipated questions:

What does this data set describe?

Title:
Undrained shear strength of sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA
Abstract:
Twenty-four piston cores (and associated trigger cores) were collected from the source zone of the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon by the U.S. Geological Survey and the University of Rhode Island Department of Ocean Engineering during an eight-day cruise aboard the R/V Hugh R. Sharp in September/October of 2012. These cores were analyzed for evidence of seafloor mass transport processes, with an emphasis on constraining the age and shallow stratigraphy of the landslide complex. Sedimentological and geotechnical characterization of the cores was carried out through whole core imaging and description, followed by analysis of discrete samples at the USGS Woods Hole Coastal and Marine Science Center's Sediment Analysis Laboratory and other facilities, including grain-size, CaCO3 content, mineral composition, and bulk index properties (e.g., undrained shear strength and water content), micropaleontologic separations, and geochronology. This data release contains the results of these core descriptions and results of the laboratory analyses.
Supplemental_Information:
Cores were collected on the Hugh R. Sharp cruise HRS1209 from September 28, 2012 to October 4, 2012, and currently reside in the Woods Hole Coastal and Marine Science Center's core repository. Information about USGS Field Activity 2012-007-FA is available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-007-FA.
  1. How might this data set be cited?
    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 20230605, Undrained shear strength of sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA: data release DOI:10.5066/P9H74BAX, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2023, Sedimentological and geotechnical analyses of marine sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA: data release DOI:10.5066/P9H74BAX, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2023, Sedimentological and geotechnical analyses of marine sediment cores from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon collected on USGS Field Activity 2012-007-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9H74BAX.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -74.75686
    East_Bounding_Coordinate: -73.63370
    North_Bounding_Coordinate: 37.96051
    South_Bounding_Coordinate: 36.14594
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/6436e5f8d34ee8d4addcb359?name=HRS1209_UndrainedShearStrength.jpg&allowOpen=true (JPEG)
    Browse image of the collection locations of cores analyzed for undrained shear strength.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 28-Sep-2012
    Ending_Date: 04-Oct-2012
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet
  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?
    HRS1209_UndrainedShearStrength.csv
    Comma Separated Value (CSV) file containing undrained shear strength data for piston cores collected from the Currituck Landslide Complex and upper slope adjacent to Baltimore Canyon. (Source: Producer Defined)
    Depth_cm
    Down-core depth at which torque gauge measured undrained shear strength (Source: Producer Defined)
    Range of values
    Minimum:5
    Maximum:810
    Units:centimeters
    HRS1209-1PC
    Shear strength (Su) of core HRS1209-1PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:4.1151
    Maximum:53.9366
    Units:kilopascals
    HRS1209-2PC
    Shear strength (Su) of core HRS1209-2PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:2.4690
    Maximum:21.3984
    Units:kilopascals
    HRS1209-3PC
    Shear strength (Su) of core HRS1209-3PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:1.6460
    Maximum:21.8099
    Units:kilopascals
    HRS1209-5PC
    Shear strength (Su) of core HRS1209-5PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:8.2301
    Maximum:29.2170
    Units:kilopascals
    HRS1209-6PC
    Shear strength (Su) of core HRS1209-6PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:4.5266
    Maximum:23.0444
    Units:kilopascals
    HRS1209-7PC
    Shear strength (Su) of core HRS1209-7PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:6.5841
    Maximum:196.1330
    Units:kilopascals
    HRS1209-8PC
    Shear strength (Su) of core HRS1209-8PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:5.3496
    Maximum:149.5514
    Units:kilopascals
    HRS1209-10PC
    Shear strength (Su) of core HRS1209-10PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:3.7036
    Maximum:25.5135
    Units:kilopascals
    HRS1209-11PC
    Shear strength (Su) of core HRS1209-11PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:2.8806
    Maximum:24.6904
    Units:kilopascals
    HRS1209-12PC
    Shear strength (Su) of core HRS1209-12PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:1.6460
    Maximum:122.5831
    Units:kilopascals
    HRS1209-13PC
    Shear strength (Su) of core HRS1209-13PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:4.1151
    Maximum:85.8082
    Units:kilopascals
    HRS1209-14PC
    Shear strength (Su) of core HRS1209-14PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:4.9381
    Maximum:128.7123
    Units:kilopascals
    HRS1209-15PC
    Shear strength (Su) of core HRS1209-15PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:5.3496
    Maximum:79.6790
    Units:kilopascals
    HRS1209-16PC
    Shear strength (Su) of core HRS1209-16PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:3.2921
    Maximum:30.4515
    Units:kilopascals
    HRS1209-17PC
    Shear strength (Su) of core HRS1209-17PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:6.9956
    Maximum:21.3984
    Units:kilopascals
    HRS1209-18PC
    Shear strength (Su) of core HRS1209-18PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:11.8843
    Maximum:181.4230
    Units:kilopascals
    HRS1209-19PC
    Shear strength (Su) of core HRS1209-19PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:5.2673
    Maximum:32.5255
    Units:kilopascals
    HRS1209-21PC
    Shear strength (Su) of core HRS1209-21PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:2.3044
    Maximum:107.8732
    Units:kilopascals
    HRS1209-23PC
    Shear strength (Su) of core HRS1209-23PC in kPa (Source: Producer Defined)
    ValueDefinition
    NaNShear strength was not measured at this depth.
    Range of values
    Minimum:5.4977
    Maximum:41.7104
    Units:kilopascals

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • A.A. Boggess
    • B.J. Buczkowski
    • J.D. Chaytor
  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, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

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

Why was the data set created?

The data provides a comprehensive understanding of the nature and properties of the sediments found in this geographic location. Undrained shear strength provides a relative measure of the sediments' ‘stiffness’ within the cores.

How was the data set created?

  1. From what previous works were the data drawn?
    Chaytor (2021) (source 1 of 1)
    Chaytor, Jason D., Ballard, Megan S., Buczkowski, Brian J., Goff, John A., Lee, Kevin M., Reed, Allen H., and Boggess, Allyson A., 2021, Measurements of Geologic Characteristics and Geophysical Properties of Sediments from the New England Mud Patch: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Type_of_Source_Media: Digital and/or Hardcopy
    Source_Contribution:
    Section B3 contains equations for unit conversion of undrained shear strength measurements.
  2. How were the data generated, processed, and modified?
    Date: 2012 (process 1 of 3)
    Each core was cut into sections on the ship during collection. The cores were then split into halves in the core lab. Person who carried out this activity:
    Jason D. Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov
    Date: 2014 (process 2 of 3)
    Shear strength was measured at the same time as the core visual description was completed. A 0.5-in (12.7-mm) diameter by 0.5-in (12.7-mm) high four-blade vane attached to a torque gauge was inserted into the sediment to a depth of 2 cm and rotated at a fixed rate until the sediment sheared. The torque gauge reading, measured in oz-in (ounce-inch) was recorded on the core description sheet. Person who carried out this activity:
    Allyson A. Boggess
    U.S. Geological Survey, NORTHEAST REGION
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2341 (voice)
    508-457-2310 (FAX)
    aboggess@usgs.gov
    Date: 2021 (process 3 of 3)
    Torque gauge measurements were converted to undrained shear strength in kPa using a series of equations described by Chaytor (2021) and entered into a spreadsheet at its corresponding core depth. Person who carried out this activity:
    Jason D. Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov
    Data sources used in this process:
    • Chaytor (2021)
  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?
    Torque measurement depths were checked to make sure that they matched the depths recorded in the data. Lower shear strength (0-9.4 oz in) sediment was measured with a manual torque gauge to an accuracy of 0.1 oz in (ounce-inch), and higher shear strength (6-25 oz in) sediment was measured with a digital torque gauge to an accuracy of 0.01 oz in. Shear strength measurements were later converted to kPa using equations described in Chaytor (2021), the associated publication.
  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?
    Of the 24 cores collected during the Hugh R. Sharp HRS1209 cruise, 19 cores were measured for shear strength. Cores chosen for analysis were thought to represent the full range of sediments expected to be encountered. Omitted cores were not included because the coring locations were near previously analyzed cores.
  5. How consistent are the relationships among the observations, including topology?
    Shear strength measurements are generally within the expected ranges. At some depths, the sediment was waterlogged and was sheared with a torque less than expected. These instances were noted on the visual core description sheets (see larger work citation).

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 Not to be used for navigation. 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)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? The dataset includes the data files (HHRS1209_UndrainedShearStrength.csv), the browse graphic (HRS1209_BrowseGraphic.jpg), and the FGDC CSDGM metadata in XML format (HRS1209_UndrainedShearStrength.xml).
  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: 05-Jun-2023
Metadata author:
Allyson A. Boggess
U.S. Geological Survey, NORTHEAST REGION
Geologist
384 Woods Hole Road
Woods Hole, MA
US

508-548-8700 x2341 (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 person is no longer with USGS.
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9H74BAX/HRS1209_UndrainedShearStrength_Metadata.faq.html>
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