David C. Twichell VeeAnn A. Cross 20010716 Open-File Report 2001-076 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr0176 https://pubs.usgs.gov/of/2001/of01-076/HTMLDOCS/DATA.HTM https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/ https://pubs.usgs.gov/of/2001/of01-076/ David C. Twichell VeeAnn A. Cross 2001 Open-File Report 2001-076 Reston, VA U.S. Geological survey https://pubs.usgs.gov/of/2001/of01-076/ 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. These HTML files show how the data was interpreted by placing both the interpreted and uninterpreted profiles together. 199709 199809 Publication Date Complete None planned -124.450840 -123.946770 +47.341170 +45.944580 USGS Metadata Identifier USGS:ad6c40fe-b9ce-42ed-9549-3123e7dea011 None Corliss html jpeg seismic seismic-reflection profiles interpretation USGS Thesaurus sub-bottom profiling image collections marine geophysics None Pacific Ocean Washington Oregon WA OR Inner shelf off Columbia River Columbia River Littoral Cell Willapa Bay Columbia River Washington continental shelf Washington coastal zone Grays Harbor None The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data. David C. Twichell USGS Oceanographer mailing and physical address

384 Woods Hold Rd.

Woods Hole MA 02543 USA 508-548-8700 508-457-2310 dtwichell@usgs.gov Consistent. This data is complete for this particular study. 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. 200110 Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added additional information to the citation information in the identification section - including the online link to the landing page of the data and the link to the publication. The Larger Work citation section was added. Added the online link to the data in the distribution section, including access instructions which explain the contents. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20171211 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Crossref DOI link was added as the first link in the metadata. 20191118 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov David C. Twichell USGS Oceanographer mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543 USA 508-548-8700 508-457-2310 dtwichell@usgs.gov 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. JPEG Each HTML file points to a JPEG of the interpreted and uninterpreted seismic-reflection profile. There is no zip file allowing a complete dataset download. No compression applied https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/ https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/INTERP/ https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/RAW/ https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/RAW/1997/ https://pubs.usgs.gov/of/2001/of01-076/HTMLSEIS/RAW/1998/ The first link is to the folder containing the individual HTML files that will show the interpreted and uninterpreted seismic-reflection profiles. The remaining links provide access to the various folders that contain the JPEG images that make up the HTML documents. CD-ROM 650 MBytes ISO 9600 with Rock Ridge extensions none at this time. 20240318 VeeAnn A. Cross USGS Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543 USA 508-548-8700 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998