David C. Twichell VeeAnn A. Cross 20010716 vector digital data 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/ David C. Twichell VeeAnn A. Cross 200110 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. This GIS overlay is a component of the Southwest Washington Coastal Erosion ArcView GIS database. This particular overlay represents the navigation tracklines for the seismic data collected in 1998. Roberts, R.W., 1974, Marine sedimentological data of the Washington continental shelf: University of Washington, Department of Oceanography Special Report 57, 129p. Nittrouer, C.A., 1978, The process of detrital sediment accumulation in a continental shelf environment: an examination of the Washington shelf: PhD Thesis, University of Washington, Seattle, WA. 243p. Smith, J.M., Messmer, L.W., Phipps, J.B., Samuelson, D.F., and Schermer, E.D., 1980, Grays Harbor and Chehalis River improvements to navigation environmental studies - Grays Harbor ocean disposal study: literature review and preliminary benthic sampling: U.S. Army Corps of Engineers Internal Report. 20010716 publication date Complete None planned -124.415780 -123.266030 46.886830 46.142470 USGS Metadata Identifier USGS:c8f46b91-b6f6-4407-92bd-3f14b259a0c6 None Corliss Vector tracklines ArcView shapefile seismic seismic-reflection profile USGS Thesaurus navigational data marine geophysics geospatial datasets 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 Hole Rd.

Woods Hole MA 02543 USA 508-548-8700 508-457-2310 dtwichell@usgs.gov Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 1; ESRI ArcCatalog 8.1.1.649 Consistent. These data are complete for this particular study. Navigation was logged simultaneously with the seismic files. These navigation files were then reformatted into an Arc/Info ungenerate format and loaded into ArcView. Subsequently attribute information was added to the table within ArcView to correspond to the seismic line and hotlinking for seismic-profiles in HTML documents. 20010301 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. 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. 20171212 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 Vector String 17 0.00018 0.00026 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 seisnav98g.dbf ArcView shapefile attribute table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. LINENUM The seismic file corresponding to the trackline. Definted aboard ship. Character set. HTMLINK String indicating the locatin of the HTML document to hotlink to for that particular line segment. User defined. Character set. 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. Shapefile The zip file contains all the seismic shapefiles released as part of the larger work citation. 1 https://pubs.usgs.gov/of/2001/of01-076/DATA/seismic.zip The zip file contains all the shapefiles associated with the seismic data within this Open-File Report. Once uncompressed, this metadata files pertains to the SEISNAV98G.SHP shapefile. CD-ROM 650 MBytes ISO9660 with Rock Ridge extensions UNIX, PC, MAC 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 local time