CERC_794:Texas USACOE ICONS Cores

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Frequently-anticipated questions:

What does this data set describe?

Title: CERC_794:Texas USACOE ICONS Cores
Abstract:
About 850 square kilometers (330 square miles) of the Texas inner shelf from High Island to Freeport was surveyed and studied, using high-resolution continuous seismic reflection profiles taken along several hundred kilometers of trackline and 34 long cores, to determine the general geologic character and surface and subbottom sediment distribution. The objective was to assess the resource potential of sand deposits suitable as fill for beach nourishment projects. Pleistocene and older sedimentary deposits underlie the study area at shallow depths, and several prominent erosion surfaces and deeply incised, and subsequently filled, stream channels are evident on the seismic records. The thickness of Holocene sediments is generally less than 3 meters (10 feel), except in channels, and the contact between the Holocene and Pleistocene units is obvious in most cores and shows good correlation with a regional reflector on the seismic profiles. Mud and muddy fine sands predominate in the area; however, very fine to fine sand is present on the shoreface and in several delta shoals. Five sites are identified which contain sand suitable for beach nourishment; two of the sites, a shoal adjacent to Galveston south jetty and an area of San Luis Pass, offer the highest potential. Volumetric estimates indicate that 63 million cubic meters (82 million cubic yards) of sand exists in the five sites.
  1. How should this data set be cited?

    U.S. Geological Survey, Unknown, CERC_794:Texas USACOE ICONS Cores: Technical Memorandum 79-4, Department of the Army, Coastal Engineering Research Center (CEREN-GE), Fort Belvoir, VA.

    This is part of the following larger work.

    Williams, S.J., Prins, D.A., and Meisburger, E.P., 1979, Sediment distribution, sand resources, and geologic character of the inner Continental Shelf off Galveston County, Texas: Technical Memorandum 79-4, Department of the Army, Coastal Engineering Research Center (CEREN-GE), Fort Belvoir, VA.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -95.2750
    East_Bounding_Coordinate: -95.0283
    North_Bounding_Coordinate: 29.4850
    South_Bounding_Coordinate: 29.0417

  3. What does it look like?

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

    Calendar_Date: 1979
    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?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Sample identifiers, navigation, core descriptions, and grain size statistics form the USACOE ICONS program project from Cape Canaveral to Georgia. Some enries for top and bottom depths were originally reported as "top." In the digital files, "top" was changed and defined as 0-0.02 meters.

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?

    The USACOE for collecting, describing and sampling the cores. Emma Mitchell and Jamey M. Reid for entering the data from the source report.

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

    Jamey M. Reid
    U.S. Geological Survey
    IT Specialist (Data Management)
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2204 (voice)
    (5080 457-2310 (FAX)
    jreid@usgs.gov

Why was the data set created?

The purpose of this datalayer is to release a digital version of the coring data from a U. S. Army Corp of Engineers (USACOE) Inner Continental Shelf (ICONS) program project in Galveston County, Texas

How was the data set created?

  1. From what previous works were the data drawn?

    USACOE Technical Memorandum 79-4 (source 1 of 1)
    Williams, S.J., Prins, D.A., and Meisburger, E.P., 1979, Sediment distribution, sand resources, and geologic character of the inner Continental Shelf off Galveston County, Texas: Technical Memorandum 79-4, Department of the Army, Coastal Engineering Research Center (CEREN-GE), Fort Belvoir, VA.

    Type_of_Source_Media: paper
    Source_Contribution:
    Sample identifiers, navigation, core descriptions, and grain-size statistics were hand-entered from report TM79-4 to create an Excel spreadsheet file.

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

    Date: 19-Jun-2002 (process 1 of 2)
    The source information was entered into an Excel spreadsheet. Additional fields were added for project identification purposes. The table information was exported and saved as an ASCII text file.

    Person who carried out this activity:

    Jamey M. Reid
    U.S. Geological Survey
    IT Specialist (Data Management)
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2204 (voice)
    (508) 457-2310 (FAX)
    jreid@usgs.gov

    Data sources used in this process:
    • CERC_794.xls

    Data sources produced in this process:

    • CERC_794.txt

    Date: 18-Jun-2004 (process 2 of 2)
    Digital data were hand formatted into dbSEABED data entry structure, then filteres and data-mined through dbSEABED software (version: db9_MNEr.bas)

    Person who carried out this activity:

    Viness Ubert
    U.S. Geological Survey
    Physical Science Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2238 (voice)
    (508) 457-2310 (FAX)
    vubert@usgs.gov

    Data sources used in this process:
    • CERCTM79-4.txt

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

    Williams, S. J., Prins, D. A., and Meisburger, E. P., 1979, Sediment distribution, sand resources, and geologic character of the inner Continental Shelf off Galveston County, Texas: Technical Memorandum 79-4, Department of the Army, Coastal Engineering Research Center (CEREN-GE), Fort Belvoir, VA.

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 by the compilers in a consistent manner.

  2. How accurate are the geographic locations?

    navigation was by Loran C. Typical nonrepetitive accuracy for Loran off Texas is about +/- 200 meters

  3. How accurate are the heights or depths?

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

    Core locations are provided for 21 vibracores;grain size for 101 analyses. There are no descriptions for the 101 analyses.

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

    No additional checks for topological consistency were performed on this data set.

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 and U.S Army Corps of Engineers must be referenced as the originators of the dataset in any future products or research derived from these data.

  1. Who distributes the data set? (Distributor 1 of 1)

    Jamey M. Reid
    U.S. Geological Survey
    IT Specialist (Data Management
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2204 (voice)
    (508) 457-2310 (FAX)
    jreid@usgs.gov

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

    Marine Aggregate Resources and Processes: CERC_794

  3. What legal disclaimers am I supposed to read?

    Although this data set has been used by the USGS and the USACOE, no warranty, expressed or implied, is made by the USGS or USACOE as to the accuracy of the dat and/or related materials. The act of distribution shall not constitute any such warranty, and responsibilty is assumed by the USGS or USACOE inthe use of these data or related materials.

  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 original data is available in Microsoft Excel or ASCII text format

Who wrote the metadata?

Dates:
Last modified: 12-Jul-2004
Last Reviewed: 25-Jun-2002
Metadata author:
U.S. Geological Survey
c/o Viness Ubert
Physical Science Technician
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2238 (voice)
(508) 457-2310 (FAX)
vubert@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 19:56:27 2006