Sediment Physical Properties Data from Sediment Cores Collected in March 2012 Along the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01)

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Frequently anticipated questions:

What does this data set describe?

Title:
Sediment Physical Properties Data from Sediment Cores Collected in March 2012 Along the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01)
Abstract:
Scientists from the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center collected a set of sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana, in March 2012. The sampling efforts were part of a larger USGS study to evaluate effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm to reduce oil transport onto federally managed lands. The objective of this study was to evaluate the response of the back-barrier tidal and wetland environments to the berm. This report serves as an archive for sedimentological and radiochemical data derived from the sediment cores. The data described in this report is available for download.
  1. How might this data set be cited?
    Marot, Marci E., Adams, C. Scott, Richwine, Kathryn A., and Smith, Christopher G., 20170315, Sediment Physical Properties Data from Sediment Cores Collected in March 2012 Along the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01): U.S. Geological Survey Data Series 1045.

    This is part of the following larger work.

    Marot, Marci E., Adams, C. Scott, Richwine, Kathyrn A., and Smith, Christopher G., 20170315, Sediment Lithology and Radiochemistry from the Back-Barrier Environments Along the Chandeleur Islands, Louisiana: March 2012: U.S. Geological Survey Data Series 1045, U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.835832
    East_Bounding_Coordinate: -88.825012
    North_Bounding_Coordinate: 29.969498
    South_Bounding_Coordinate: 29.895495
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 24-Mar-2012
    Ending_Date: 26-Mar-2012
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tabular digital data
  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?
    Physical_Parameter_Data.xlsx
    Physical lithological parameter results of sediment push cores collected on the Chandeleur Islands, Louisiana. (Source: USGS)
    Core ID
    Marsh sediment core site number (Source: USGS) Core site identification number assigned by USGS scientist
    Depth (cm)
    Sample interval depth measured from top of the core (cm) (Source: USGS)
    Range of values
    Minimum:0
    Maximum:70
    Water Content (g-water/g-wet)
    The ratio of mass of water to the mass of wet sediment in the individual sample interval, measured in grams of water per grams of wet sediment (Source: USGS)
    Range of values
    Minimum:0.17
    Maximum:0.74
    Dry Bulk Density (g/cm^3)
    Dry bulk density of the sediment measured in grams per cubic centimeter. (Source: USGS)
    Range of values
    Minimum:0.27
    Maximum:2.03
    Porosity
    Porosity in each sample interval measured in cubic centimeter of void space per cubic centimeter of wet sediment. (Source: USGS)
    Range of values
    Minimum:0.33
    Maximum:0.88
    Loss On Ignition (g-OM/g-dry)
    The ratio of the mass of organic matter combusted at 450 degrees Celsius to the pre-combusted mass of dry sediment measured in grams of organic matter to grams of dry sediment. (Source: USGS)
    Range of values
    Minimum:0.002
    Maximum:0.25

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Marci E. Marot
    • C. Scott Adams
    • Kathryn A. Richwine
    • Christopher G. Smith
  2. Who also contributed to the data set?
    U.S. Geological Survey
  3. To whom should users address questions about the data?
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Marci E. Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    US

    (727) 502-8000 (voice)
    mmarot@usgs.gov

Why was the data set created?

The Physical_Parameter_Data.xlsx file includes all bulk lithologic analysis results from back-barrier wetland sediment cores collected on or around the Chandeleur Islands, Louisiana in March 2012 by the USGS St. Petersburg Coastal and Marine Science Center.

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: 2012 (process 1 of 4)
    At each of the seven sample sites, a 10.2-centimeter (cm) diameter push core was collected. Eight sediment push cores were collected, in total, with core lengths varying between 45.5 and 70 cm. Accurate position and elevation data were obtained at all sampling locations with an Ashtech Differential Global Positioning System (DGPS) receiver and antenna with occupation times of 30 minutes. The accuracy of both horizontal position and elevation were improved by post-processing the DGPS data using a local benchmark, which was occupied throughout the course of each field activity by a similar DGPS system. At a local field station, the cores were sectioned at 1-cm intervals to a depth of 50 cm, below 50 cm the core was sectioned at 2-cm intervals to the base of the core. The subsections were placed in individual storage bags, and stored on ice. The sectioned core samples were transported to the USGS SPCMSC. Person who carried out this activity:
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Marci E. Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    mmarot@usgs.gov
    Date: 2012 (process 2 of 4)
    In the laboratory, samples were homogenized in the sample bag and a subsample of each 1 or 2 cm interval was processed for basic sediment characteristics (dry bulk density and porosity). Water content, porosity and dry bulk density were determined using water mass lost during drying. Thirty ml of each wet subsample was packed into a graduated syringe with 0.5 ml resolution. The wet sediment was then extracted into a pre-weighed aluminum tray and the weight of the wet sediment was recorded. The wet sediment and tray were placed in a drying oven for approximately 48 hours at 60 degrees Celsius (°C). Water content was determined as the mass of water (in other words, mass lost when dried) relative to the initial wet mass. Salt-mass contributions were removed from the porosity values under the assumption that pore water salinity was equivalent to an average salinity of 25. Porosity and dry bulk density were calculated from the reported equations in the document. Person who carried out this activity:
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Marci E. Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    mmarot@usgs.gov
    Date: 2012 (process 3 of 4)
    Organic matter content was determined using a similar mass loss technique, commonly referred to as loss on ignition. The dry sediment from the processing described above was homogenized using a porcelain mortar and pestle. Approximately 5 g of the dry sediment was placed into a pre-weighed porcelain crucible. The mass of the dried sediment was recorded with an analytical balance to a precision of 0.01 g. The samples were then placed into a laboratory muffle furnace with stabilizing temperature control. The furnace was ramped to 450 °C over a 30 minute interval and then held at 450 °C for 6 hours. The furnace temperature was then lowered to 60 °C and held at this temperature until the sediments could be reweighed. The latter step prevents the absorption of moisture, which can affect the measurement. Samples were reweighed using the same balance and to a precision of 0.01 g. The mass lost during the 6-hour baking period relative to the initial dry mass is used as a metric of organic matter content. Person who carried out this activity:
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Marci E. Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    mmarot@usgs.gov
    Date: 13-Oct-2020 (process 4 of 4)
    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?
    The physical parameters reported in the tables were analyzed at the USGS SPCMSC sedimentology lab. These lithologic data have not been independently verified for accuracy. Replicate analyses of loss on ignition are reported for quality assurance.
  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?
    This is a complete processed physical parameters data file for the USGS FAN 12BIM01.
  5. How consistent are the relationships among the observations, including topology?
    The data include core ID, date of collection, sample depth interval in core (cm), water content, dry bulk density, porosity, and loss on ignition.

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 U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Marci E. Marot
    600 4th Street South
    St. Petersburg, FL
    U.S.

    502-8000 (voice)
    mmarot@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?
    Although these data have been processed successfully on a computer system at 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 imply any such warranty. The USGS or U.S. Government shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Any use of trade, firm, or product 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 spreadsheets included in this workbook were created for use with Microsoft Excel 2010. They may also be viewed with the Microsoft Excel viewer or by downloading a Microsoft Compatibility Pack to view with older versions of Microsoft Excel.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Attn: Marci E. Marot
Geologist
600 4th Street South
St. Petersburg, FL
U.S.

(727) 502-8000 (voice)
mmarot@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/ds1045_Physical_Parameter-met.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:54 2021