A Sedimentological Investigation of Coastal Cells from Cape Sand Blas to Indian Pass; Florida (Gary R. Lader Thesis)

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Frequently-anticipated questions:

What does this data set describe?

Title:
A Sedimentological Investigation of Coastal Cells from Cape Sand Blas to Indian Pass; Florida (Gary R. Lader Thesis)
Abstract:
A sedimentological investigation of recent beach sand near Cape San Blas, Florida, has revealed the presence of a number of relatively stable longshore drift cells. conceptually, the coastal cell is a closed system of erosion, transport, and deposition, bounded by points at which the longshore component of wave power is zero. Between these points, a positive littoral power gradient (erosion) complements a negative power gradient (deposition). The model has made possible computer predictions of cell and "subcell" locations for the same area, the latter term implying some leakage between neighboring systems. By using near-shore bathymetry and average wave parameters to calculate power variations, this method (if accurate) is invaluable forlocal coastal erosion studies. The sense of drift within each subcell in the study area is in the direction of decreasing grain size, increasing sorting, and a decreasing percentage of unstable minerals. Curves of mean grain size, standard deviation (a measure of sorting), and heavy mineral concentrations versus distance, correlate well with each other, and with predicted subcell locations. Counts of selected features from scanning electron microscope photographs of quartz grain surfaces also correlate, showing increasing chemical solution effects downdrift. The best correlation of data has been for the mid-swash zone for an initial wave approach direction from 1800. Three well-developed subcells here suggest that this particular level is most sensitive and hence most representative of average, longer term wave conditions. Lower beach levels appear to be more or less in constant flux, and higher levels seem to be affected by particularly high tides or storms.
  1. How should this data set be cited?

    Jenkins, Christopher J. , 2002, A Sedimentological Investigation of Coastal Cells from Cape Sand Blas to Indian Pass; Florida (Gary R. Lader Thesis).

    Online Links:

    Other_Citation_Details:
    Geology Department, Forida State University, Tallahassee, FL 32306

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -85.347
    East_Bounding_Coordinate: -85.2289
    North_Bounding_Coordinate: 29.6842
    South_Bounding_Coordinate: 29.6639

  3. What does it look like?

    Lader1974.jpg
    Image showing geographic extent of data layer coverage

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 1974
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: document

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Entity point (16)

    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 0.0000. Longitudes are given to the nearest 0.0000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Please review the cross reference information for the original data set credit to Lader (1974), and Chris Jenkins for digitizing samples locations and entering the data from the source report.

  3. To whom should users address questions about the data?

    Florida State University
    Department of Geological Sciences
    Tallahassee, FL 32306-4100

    850-644-5860 (voice)
    webmaster@gly.fsu.edu

Why was the data set created?

The purpose of this data layer is to create a digital version of the sedimentary characteristics published by Lader (1974) for inclusion in the usSEABED data collection.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    (process 1 of 1)
    Digital data were hand formatted into dbSEABED data entry structure, then filtered and data-mined through dbSEABED software (version: db9_MNEx.bas)

    Person who carried out this activity:

    Chris Jenkins
    Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder
    1560 30th Street
    Boulder, CO 80309-0450
    USA

    (303) 492-6387 (voice)
    (303) 492-6388 (FAX)

  3. What similar or related data should the user be aware of?

    Lader, Gary R. , 1974, A Sedimentological Investigation of Coastal Cells From Cape San Blas to Indian Pass, Florida: Forida State University, Tallahassee, Forida.

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

  1. How well have the observations been checked?

    All attributes were entered and checked in a consistent manner.

  2. How accurate are the geographic locations?

    Navigational accuracy is unknown.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    Sedimentary descriptions and locations are provided for 16 samples.

  5. How consistent are the relationships among the observations, including topology?

    No additional check for topological consistency were performed on this data.

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:
None except that acknowledgement must be made in publications and reports of (i) the original data source, and (ii) the data integration by USGS and dbSEABED project at the University of Colorado.

  1. Who distributes the data set?[Distributor contact information not provided.]

  2. What's the catalog number I need to order this data set?

    Lader, 1974

  3. What legal disclaimers am I supposed to read?

    Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 22-Mar-2006
Metadata author:
U.S. Geological Survey
c/o Brian J. Buczkowski
Core Curator and Data Management Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2361 (voice)
(508) 457-2310 (FAX)
bbuczkowski@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.24 on Mon Mar 27 19:54:57 2006