Interpreted and Uninterpreted Seismic-Reflection Profiles In HTML Format

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  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?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

Title:

Interpreted and Uninterpreted Seismic-Reflection Profiles In HTML Format

Abstract:

Two 21-day field operations were conducted in 1997 and 1998 in the estuaries and on the inner continental shelf off the northern Oregon and southern Washington coast. These cruises aboard the R/V Corliss were run in order to generate reconnaissance maps of the seafloor geology and the shallow subsurface stratigraphy using sidescan sonar and seismic-reflection mapping techniques. The 1998 cruise also collected sediment grab samples, bottom photographs, and video images to verify the sidescan-sonar imagery and to document the seafloor geology. The combination of these data with previously collected sediment sample data (Robert, 1974; Nittrouer, 1978; and Smith et. al., 1980) has been used to define the extent and lithology of shelf sediments associated with the Columbia River littoral cell. This work is one component of a larger project studying the erosion of the Washington and Oregon coast and is being coordinated by the U.S. Geological Survey and the Washington State Department of Ecology. The reason for collecting these data is to provide a regional synthesis of the offshore geology to support a wide variety of management decisions and to provide a basis for further process-oriented investigations.

1. How should this data set be cited?

   Twichell, David C. , and Cross, VeeAnn A. , 20010716, Interpreted and Uninterpreted Seismic-Reflection Profiles In HTML Format.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -124.450840

   East_Bounding_Coordinate: -123.946770

   North_Bounding_Coordinate: +47.341170

   South_Bounding_Coordinate: +45.944580

3. What does it look like?

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

   Beginning_Date: Sep-1997

   Ending_Date: Sep-1998

   Currentness_Reference: Publication Date

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

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?

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • David C. Twichell
   • VeeAnn A. Cross

2. Who also contributed to the data set?

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

   David C. Twichell
   USGS
   Oceanographer
   384 Woods Hold Rd.
   Woods Hole, MA 02543
   USA
   

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

Why was the data set created?

These HTML files show how the data was interpreted by placing both the interpreted and uninterpreted profiles together.

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: Nov-2000 (process 1 of 1)

   These images are a result of outputting CGM files from Seisworks software package. Of particular note is a problem with the scale. In some cases, the profile has a horizontal scale which should be disregarded. Once the CGM files were exported from Seisworks, they were then converted to JPEGS using the Larson cgm to jpeg converter. These files were then resampled to 1/8th their orignal size and incorporated into HTML documents. Each seismic line has both the interpreted and uninterpreted profiles in a single HTML document.

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

1. How well have the observations been checked?

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 data is complete for this particular study.

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

   Consistent.

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 must be referenced as the originator of the dataset in any future products or research derived from these data.

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

   David C. Twichell
   USGS
   Oceanographer
   384 Woods Hole Rd.
   Woods Hole, MA 02543
   USA
   

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

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

3. What legal disclaimers am I supposed to read?

   This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitude or imply its endorsement, recommendation, or favoring by the United States Governemnt or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	TIFF
     Media you can order:	CD-ROM (Density 650 MBytes) (format ISO 9600 with Rock Ridge extensions)

   • Cost to order the data: none at this time.

Who wrote the metadata?

Dates:

Last modified: 24-Jul-2001

Metadata author:

VeeAnn A. Cross
USGS
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA 02543
USA

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

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp (URL: http://geology.usgs.gov/tools/metadata/tools/doc/mp.html ) version 2.7.3 on Fri Nov 16 16:31:22 2001