Undrained shear strength of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA

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What does this data set describe?

Title:
Undrained shear strength of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA
Abstract:
Variability in sediment properties with depth and the thickness of individual sedimentary layers are critical determinants of seabed acoustic response. The New England Mud Patch (NEMP), located south of Cape Cod, is an unusual feature on the U.S. Continental Shelf in that it is composed of fine-grained sediment layers containing a relatively-homogeneous mix of sand, silt, and clay-sized particles bounded by more typical sandy shelf sediments. The unique characteristics and nature of this deposit is due to a derivation of sediments that have been transported to, and deposited in, a basal bowl-shaped depression since the last glacial maximum. Ninety-two piston, vibra-, and gravity cores with a maximum length of 8.2 meters were collected from across the New England Mud Patch during a 2-leg, 10-day cruise aboard the R/V Endeavor in the spring of 2016. Geologic characterization and analysis of a subset of the cores including grain size, CaCO3, mineral composition, and bulk index properties (undrained shear strength, water content, density, and porosity) of discrete samples was carried out at the USGS Woods Hole Coastal and Marine Science Center's (WHCMSC) Sediment Analysis Laboratory. This data release contains the results of these analyses, along with visual core descriptions and summary sheets for each core analyzed for this study.
Supplemental_Information:
Cores were collected on the 2016 R/V Endeavor cruise EN577 from April 19, 2016 to May 2, 2016. Information about this expedition, also known as USGS Field Activity 2016-001-FA, is available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-001-FA
  1. How might this data set be cited?
    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 20210819, Undrained shear strength of sediment cores from the New England Mud Patch collected on USGS Field Activity 2016-001-FA: data release DOI:10.5066/P9ZYK3PX, 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., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZYK3PX.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.7979
    East_Bounding_Coordinate: -70.4370
    North_Bounding_Coordinate: 40.5952
    South_Bounding_Coordinate: 40.3058
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/60551a34d34e1894882d0a4e/?name=MudPatchCores_BrowseGraphic.png (PNG)
    Browse image of the core collection locations and spatial extent of the study area
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 19-Apr-2016
    Ending_Date: 02-May-2016
    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?
    EN577_UndrainedShearStrength_PistonCores.csv
    Comma Separated Value (CSV) file containing shear strength data for 37 NEMP piston cores. Point dataset. 1429 data records. (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
    EN577-1PC
    Shear strength (Su) of core EN577-1PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:22.3
    Units:kilopascals
    EN577-3PC
    Shear strength (Su) of core EN577-3PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:0.0
    Maximum:13.0
    Units:kilopascals
    EN577-6PC
    Shear strength (Su) of core EN577-6PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.9
    Maximum:23.8
    Units:kilopascals
    EN577-7PC
    Shear strength (Su) of core EN577-7PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.1
    Maximum:23.7
    Units:kilopascals
    EN577-8PC
    Shear strength (Su) of core EN577-8PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.6
    Maximum:12.5
    Units:kilopascals
    EN577-9PC
    Shear strength (Su) of core EN577-9PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.8
    Maximum:26.2
    Units:kilopascals
    EN577-12PC
    Shear strength (Su) of core EN577-12PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.9
    Maximum:20.8
    Units:kilopascals
    EN577-13PC
    Shear strength (Su) of core EN577-13PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:31.0
    Units:kilopascals
    EN577-14PC
    Shear strength (Su) of core EN577-14PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.6
    Maximum:19.1
    Units:kilopascals
    EN577-15PC
    Shear strength (Su) of core EN577-15PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.1
    Maximum:11.9
    Units:kilopascals
    EN577-17PC
    Shear strength (Su) of core EN577-17PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.4
    Maximum:14.5
    Units:kilopascals
    EN577-19PC
    Shear strength (Su) of core EN577-19PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.3
    Maximum:21.1
    Units:kilopascals
    EN577-20PC
    Shear strength (Su) of core EN577-20PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.1
    Maximum:28.0
    Units:kilopascals
    EN577-21PC
    Shear strength (Su) of core EN577-21PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.6
    Maximum:24.7
    Units:kilopascals
    EN577-24PC
    Shear strength (Su) of core EN577-24PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:27.3
    Units:kilopascals
    EN577-26PC
    Shear strength (Su) of core EN577-26PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.9
    Maximum:15.5
    Units:kilopascals
    EN577-27PC
    Shear strength (Su) of core EN577-27PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:46.4
    Units:kilopascals
    EN577-28PC
    Shear strength (Su) of core EN577-28PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.9
    Maximum:28.9
    Units:kilopascals
    EN577-29PC
    Shear strength (Su) of core EN577-29PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.6
    Maximum:27.7
    Units:kilopascals
    EN577-30PC
    Shear strength (Su) of core EN577-30PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.8
    Maximum:15.0
    Units:kilopascals
    EN577-31PC
    Shear strength (Su) of core EN577-31PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:7.4
    Maximum:15.5
    Units:kilopascals
    EN577-33PC
    Shear strength (Su) of core EN577-33PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:15.0
    Units:kilopascals
    EN577-36PC
    Shear strength (Su) of core EN577-36PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.1
    Maximum:27.0
    Units:kilopascals
    EN577-38PC
    Shear strength (Su) of core EN577-38PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.0
    Maximum:23.9
    Units:kilopascals
    EN577-40PC
    Shear strength (Su) of core EN577-40PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:31.5
    Units:kilopascals
    EN577-43PC
    Shear strength (Su) of core EN577-43PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:7.1
    Maximum:12.8
    Units:kilopascals
    EN577-45PC
    Shear strength (Su) of core EN577-45PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.1
    Maximum:21.6
    Units:kilopascals
    EN577-46PC
    Shear strength (Su) of core EN577-46PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:11.4
    Units:kilopascals
    EN577-47PC
    Shear strength (Su) of core EN577-47PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.6
    Maximum:10.9
    Units:kilopascals
    EN577-48PC
    Shear strength (Su) of core EN577-48PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.6
    Maximum:9.7
    Units:kilopascals
    EN577-49PC
    Shear strength (Su) of core EN577-49PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.0
    Maximum:21.3
    Units:kilopascals
    EN577-51PC
    Shear strength (Su) of core EN577-51PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.1
    Maximum:22.6
    Units:kilopascals
    EN577-52PC
    Shear strength (Su) of core EN577-52PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.8
    Maximum:13.3
    Units:kilopascals
    EN577-53PC
    Shear strength (Su) of core EN577-53PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:10.7
    Units:kilopascals
    EN577-54PC
    Shear strength (Su) of core EN577-54PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.1
    Maximum:24.6
    Units:kilopascals
    EN577-55PC
    Shear strength (Su) of core EN577-55PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.5
    Maximum:22.3
    Units:kilopascals
    EN577-56PC
    Shear strength (Su) of core EN577-56PC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.8
    Maximum:14.8
    Units:kilopascals
    EN577_UndrainedShearStrength_TriggerCores.csv
    Comma Separated Value (CSV) file containing shear strength data for 19 NEMP trigger cores. Point dataset. 72 data records. (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:70
    Units:centimeters
    EN577-2TC
    Shear strength (Su) of core EN577-2TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:9.2
    Units:kilopascals
    EN577-5TC
    Shear strength (Su) of core EN577-5TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:5.9
    Units:kilopascals
    EN577-9TC
    Shear strength (Su) of core EN577-9TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:1.7
    Maximum:8.6
    Units:kilopascals
    EN577-10TC
    Shear strength (Su) of core EN577-10TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.4
    Maximum:8.9
    Units:kilopascals
    EN577-11TC
    Shear strength (Su) of core EN577-11TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.4
    Maximum:6.4
    Units:kilopascals
    EN577-12TC
    Shear strength (Su) of core EN577-12TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.4
    Maximum:8.4
    Units:kilopascals
    EN577-14TC
    Shear strength (Su) of core EN577-14TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.1
    Maximum:8.6
    Units:kilopascals
    EN577-17TC
    Shear strength (Su) of core EN577-17TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.0
    Maximum:4.9
    Units:kilopascals
    EN577-33TC
    Shear strength (Su) of core EN577-33TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.6
    Maximum:9.9
    Units:kilopascals
    EN577-35TC
    Shear strength (Su) of core EN577-35TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.0
    Maximum:7.6
    Units:kilopascals
    EN577-36TC
    Shear strength (Su) of core EN577-36TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.8
    Maximum:9.2
    Units:kilopascals
    EN577-41TC
    Shear strength (Su) of core EN577-41TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.8
    Maximum:5.8
    Units:kilopascals
    EN577-43TC
    Shear strength (Su) of core EN577-43TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.5
    Maximum:10.2
    Units:kilopascals
    EN577-45TC
    Shear strength (Su) of core EN577-45TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.1
    Maximum:8.9
    Units:kilopascals
    EN577-46TC
    Shear strength (Su) of core EN577-46TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.4
    Maximum:8.2
    Units:kilopascals
    EN577-49TC
    Shear strength (Su) of core EN577-49TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:5.3
    Maximum:10.9
    Units:kilopascals
    EN577-52TC
    Shear strength (Su) of core EN577-52TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:4.4
    Units:kilopascals
    EN577-53TC
    Shear strength (Su) of core EN577-53TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.5
    Maximum:5.1
    Units:kilopascals
    EN577-55TC
    Shear strength (Su) of core EN577-55TC in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:9.2
    Units:kilopascals
    EN577_UndrainedShearStrength_AcousticCores.csv
    Comma Separated Value (CSV) file containing shear strength data for 10 aNEMP acoustic/gravity cores. Point dataset. 163 data records. (Source: Producer Defined)
    Depth (cm)
    Down-core depth at which torque gauge measured undrained shear strength (Source: Producer Defined)
    Range of values
    Minimum:10
    Maximum:220
    Units:centimeters
    EN577-AC1-1
    Shear strength (Su) of core EN577-AC1-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.6
    Maximum:11.4
    Units:kilopascals
    EN577-AC2-2
    Shear strength (Su) of core EN577-AC2-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.9
    Maximum:10.9
    Units:kilopascals
    EN577-AC3-1
    Shear strength (Su) of core EN577-AC3-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.9
    Maximum:15.5
    Units:kilopascals
    EN577-AC4-1
    Shear strength (Su) of core EN577-AC4-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.6
    Maximum:9.9
    Units:kilopascals
    EN577-AC5-1
    Shear strength (Su) of core EN577-AC5-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.6
    Maximum:11.5
    Units:kilopascals
    EN577-AC6-1
    Shear strength (Su) of core EN577-AC6-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.3
    Maximum:10.2
    Units:kilopascals
    EN577-AC7-1
    Shear strength (Su) of core EN577-AC7-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:6.8
    Maximum:11.9
    Units:kilopascals
    EN577-AC8-1
    Shear strength (Su) of core EN577-AC8-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:3.8
    Maximum:12.4
    Units:kilopascals
    EN577-AC9-1
    Shear strength (Su) of core EN577-AC9-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.8
    Maximum:10.9
    Units:kilopascals
    EN577-AC10-1
    Shear strength (Su) of core EN577-AC10-1 in kPa (Source: Producer Defined)
    ValueDefinition
    << empty cell >>Shear strength was not measured at this depth.
    Range of values
    Minimum:4.0
    Maximum:13.8
    Units:kilopascals
    Entity_and_Attribute_Overview:
    Finalized undrained shear strength data was taken from a master table of calculations and compiled into three CSV (comma-separated value)spreadsheet files pertaining to each core type (piston, trigger, and acoustic cores).
    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)
    • 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 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 gained through the analyses of cores collected from the New England Mud Patch help provide 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: 2016 (process 1 of 4)
    Each core was cut into sections on the ship during collection. The cores were then split into halves in the core lab. Shear strength was measured at the same time as the core visual description was completed. Person who carried out this activity:
    Jason 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: 2020 (process 2 of 4)
    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) and later converted to kPa, was recorded on the core description sheet, then later entered into a spreadsheet at its corresponding core depth. 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: 2020 (process 3 of 4)
    Torque gauge measurements were converted to undrained shear strength in kPa using a series of equations described by Chaytor (2021), the listed associated publication. Shear strength measurements in kPa were compiled into three spreadsheets, grouped together by core type. See "Overview Description" in the "Entity and Attributes" section for more information about the presentation of the data. Person who carried out this activity:
    Jason 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)
    Date: 17-Nov-2021 (process 4 of 4)
    Tweaked a thesaurus name (20211117). 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?
    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: IEEE Oceanic Engineering Society, Piscataway, NJ.

    Online Links:

    Other_Citation_Details:
    This journal article is the publication supported by this data release.

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.
  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 98 cores collected on the EN577 cruise, 66 cores were measured for shear strength. Cores chosen for analysis were those that were thought to represent the full range of sediments expected to be encountered. Any cores omitted from analysis were not included because the coring locations were in close proximity to 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.

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? Comma-separated value spreadsheets (EN577_UndrainedShearStrength_PistonCores.csv, EN577_UndrainedShearStrength_TriggerCores.csv, EN577_UndrainedShearStrength_AcousticCores.csv), browse graphic, and associated FGDC CSDGM metadata in 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: 17-Nov-2021
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)
aboggess@usgs.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

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