Metadata: Identification_Information: Citation: Citation_Information: Originator: VeeAnn A. Cross Originator: David C. Twichell Originator: Kenneth F. Parolski Originator: Scott E. Harrison Publication_Date: 1998 Title: Archive of Boomer seismic reflection data collected aboard RV CORLISS cruise CRLS97007 off northern Oregon and southern Washington inner continental shelf Series_Information: Series_Name: Open-File Report Issue_Identification: 98-351 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: Suggested citation: Cross, V.A., Twichell, D.C., Parolski, K.F., and Harrison, S.E., 1998, Archive of Boomer seismic reflection data collected aboard RV CORLISS cruise CRLS97007 off northern Oregon and southern Washington inner continental shelf: U.S. Geological Survey Open-File Report 98-351, https://doi.org/10.3133/ofr98351 . This is actually a set of 2 CD-ROMs. Online_Linkage: https://doi.org/10.3133/ofr98351 Description: Abstract: This CD-ROM contains digital high resolution seismic-reflection and bathymetric data collected during the USGS CORLISS 97007 cruise during Aug. 27 to Sept. 13, 1997. The study area covers the inner and middle continental shelf extending 150 km along the coast from Tillamook Head, OR northward past the mouth of the Columbia River to Point Grenville, WA. Seismic data were collected along a grid of track lines run parallel and perpendicular to the coast that were spaced about 5 km apart. The seismic-reflection data are stored as SEG-Y standard format that can be read and manipulated by most seismic processing software. Much of the information specific to the data are contained in the headers of the SEG-Y format files. The file system format is ISO 9660 which can be read with DOS, Unix, and MAC operating systems with the appropriate CD-ROM driver software installed. The navigation and bathymetric data are stored as an ASCII file with the navigation and depth information logged mostly at a 10 second interval. When the fathometer was not operating the depth field is replaced with a value of 9999. Depths are presented in meters from the sea surface (assuming a speed of sound in water of 1450 m/sec). Both raw and tidally corrected depths are present in the navigation file. Purpose: A 21-day field operation was conducted on the inner and middle continental shelf off the northern Oregon and southern Washington coast during which approximately 1200 line km of seismic-reflection, sidescan-sonar, and bathymetric data were acquired to generate reconnaissance maps of the seafloor geology and the shallow subsurface stratigraphy of this shelf environment. The Columbia River has provided huge amounts of sediment to this shelf during the Holocene transgression. Previous studies have mapped the distribution and thickness of this modern deposit on the middle and outer shelf (Nittrauer, 1978; Wolf and others, 1997), however, the distribution of this deposit on the inner shelf and its link to the adjacent coastal environment were not as clearly understood because of incomplete data coverage on the innermost shelf. Although sidescan-sonar imagery has been collected off the mouth of the Columbia River, no reconnaissance coverage was available for the entire area. Additionally, the most recent bathymetric survey of this area was completed during the 1920s (National Ocean Service, 1983). Anthropogenic activity within the Columbia River drainage basin (agriculture, logging, construction of dams, and dredging of the estuary mouth) may have altered the sediment discharge from the river which, in turn, may be affecting sediment distribution on the shelf and in adjacent coastal environments. The seismic-reflection data in concert with sidescan-sonar imagery and bathymetry collected along the same survey lines will provide an overall synthesis of the sea floor environment including the Holocene stratal geometry, the distribution of different sediment types, the distribution of mobile bedforms, outcrops of Pleistocene and older strata, and the locations of faults. The goal of this project 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. The project is conducted cooperatively with the Washington State Department of Ecology. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19970827 Beginning_Time: 2004 GMT Ending_Date: 19970913 Ending_Time: 2220 GMT Currentness_Reference: ground condition of data acquisition. Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -124.5 East_Bounding_Coordinate: -123.8 North_Bounding_Coordinate: 47.6 South_Bounding_Coordinate: 46.9 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:71b49600-94bb-483e-b45c-a9a41160720b Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seismic reflection Theme_Keyword: SEG-Y Theme_Keyword: Boomer Theme_Keyword: Geopulse Theme_Keyword: ISO 9660 CD-ROM Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: seismic reflection methods Theme_Keyword: marine geophysics Theme_Keyword: navigational data Theme_Keyword: sub-bottom profiling Theme_Keyword: image collections Theme_Keyword: marine geology Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: None Place_Keyword: Pacific Ocean Place_Keyword: Washington Place_Keyword: Oregon Place_Keyword: WA Place_Keyword: OR Place_Keyword: Inner shelf off Columbia River Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Twichell, Dave Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Project Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Data_Set_Credit: Seafloor Mapping Group Native_Data_Set_Environment: EPC 8-bit format Data_Quality_Information: Logical_Consistency_Report: The SEG-Y files were plotted in the field using SEISMIC-UNIX seismic processing Completeness_Report: archive of SEG-Y format seismic data collected on the cruise. The following are a list of data not available: no line 7, section 1; no line 8 section 1, Line 8, section 3 is shown as L9S1 on the trackline map, misnamed in the field (should be L9S1); no line 11 section 1; no line 18, section 1; no navigation for line 27 section 4; no line 39 section 2. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The ship was navigated with P-CODE GPS Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 20 Horizontal_Positional_Accuracy_Explanation: P-CODE GPS is assumed to be accurate within 10-20meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical position was local sea level for the depth measurements. Tide correction was applied during processing, but the datum corrected to was unspecified in the report (so unsure if it was mean sea level, mean lower low water etc.). The navigation text file (allnav.txt) contains the original depth values, edited depth values, smoothed depth values and the tide corrected depths. Lineage: Process_Step: Process_Description: The subbottom data were recorded on the EPC Labs, Inc. ADS-640 data logging system in EPC 8-bit format. The data were converted from EPC format to SEG-Y format using the epc2segy conversion program provided by EPC, Labs Inc. The data were filtered with a low pass of 200-300 Hz and a high pass of 2000-3000 Hz at the acquisition step along with 26-55 db gain. An ITI hydrophone was used on lines 1-29 during the first 10 days of the cruise, and the acquisition was set for 26-32 db gain. A Benthos hydrophone was used on lines 30-47 collected during the last 8 days of the cruise, and the acquisition was set for 38-44 db gain for most of this time. Process_Date: 199709 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Twichell, Dave Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Project Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: Edited the metadata to improve formatting and remove errors flagged by MP 2.9.50. Edits include, but are not limited to: Added various fields such as series information to be consistent with other metadata produced by Woods Hole Coastal and Marine Science Center. Updated several field to more accurate information (currentness reference, status, etc.). Added additinal information to the completeness report; set the spatial reference to geographic to coincide with the navigation text file. The original spatial reference information was: Planar: Grid_Coordinate_System: Grid_Coordinate_System_name: Geographic Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 10 Ordinate_Resolution: 10 Planar_Distance_Units: seconds of arc Added a detailed entity and attribute section to describe the navigation text file. Removed blank elements. Updated the distribution liability to an FSP approved statement. A persistent identifier (PID) was added to the metadata in the thesaurus section. (20250813) Process_Date: 20250813 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Horizontal coordinate units for X and Y are in seconds of arc from Greenwich and the Equator for each shot location and are located in the SEG-Y trace headers. The separate navigation file is in geographic. Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: Degrees and decimal minutes Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298257 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: assumed sea level Altitude_Resolution: 1 Altitude_Distance_Units: two-way travel time Altitude_Encoding_Method: Attribute values Depth_System_Definition: Depth_Datum_Name: local surface (sea level) Depth_Resolution: 1 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: allnav.txt Entity_Type_Definition: Tab-delimited text file of the compilation of all the navigation collected on the cruise. Contains 36683 data records. Entity_Type_Definition_Source: Producer defined. Attribute: Attribute_Label: Jdtime Attribute_Definition: Julian day, hour, minute, second (times are in GMT) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: text Attribute: Attribute_Label: Lon Attribute_Definition: Longitude of the navigation fix with the negative indicating the western hemisphere. The data is in the format degrees decimal minutes with the degress designated by a 'd'. For example -124d05.6850 Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: text Attribute: Attribute_Label: Lat Attribute_Definition: Latitude of the navigation fix with the postive value indicating the northern hemisphere. The data is in the format degrees decimal minutes with the degress designated by a 'd'. For example 46d55.3220 Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: text Attribute: Attribute_Label: Unc_depth Attribute_Definition: Edited file of uncorrected and unaveraged depths - there were a lot of bad values that had to be deleted. These bad values were replaced with 9999 which represents a no data value. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5 Range_Domain_Maximum: 160.7 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Smooth Attribute_Definition: Edited values of uncorrected but averaged depths. A 10 point running average was applied to the bathymetric data to assist in removing the surface swell. Values of 9999 are no data values. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.33 Range_Domain_Maximum: 158.1 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Source Attribute_Definition: Data source of the bathymetric value - 1 indicates collected in the field, a value of 2 indicates the value was digitized off the analog 3.5kHz record. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Collected in the field using the fathometer. Enumerated_Domain_Value_Definition_Source: Producer defined. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: The value was digitized off the analog 3.5kHz record Enumerated_Domain_Value_Definition_Source: Producer defined. Attribute: Attribute_Label: Tide_Cor Attribute_Definition: Tide corrected depths using the averaged values. The correction used a weighted average of the Toke Point and Astoria tide stations. A value of 9999 indicates no data. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.67 Range_Domain_Maximum: 156.81 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: line Attribute_Definition: Seismic line number. Blank value indicates no seismic data acquisition at that point. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Unrepresentable_Domain: text Attribute: Attribute_Label: shot# Attribute_Definition: Seismic shot number. Blank value indicates no seismic data acquisition at that point. Attribute_Definition_Source: Producer defined. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 28320 Attribute_Units_of_Measure: shot Overview_Description: Entity_and_Attribute_Overview: The data were acquired using a Huntec electro-mechanical sound source powered by an ORE or EG+G power supply and ITI or Benthos streamer as the receiver. Seismic data were logged digitally with the EPC ADS-640 acquisition system. The field data were reformatted to SEG-Y format and were checked for quality with the SEISMIC UNIX seismic processing software and are archived on this CD-ROM. The SEG-Y format is described in detail by Barry and others (1975). The files are standard 16-bit unsigned integer SEG-Y format. The SEG-Y files consist of shot files with one trace per shot. There are 2048 samples per trace. The sample interval is 61 microsec. which resulted in a trace length of 125 ms. The boomer was fired mostly at a rate of 0.5 seconds. Entity_and_Attribute_Detail_Citation: Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats, in Digital Tape Standards; Society of Exploration Geophysicists ["Recommended standards for digital tape formats" reprinted from Geophysics, v. 32, p. 1073 - 1084; v. 37, p. 36-44; v. 40, p. 344 - 352.] p. 22 - 30. Cohen, J.K., and Stockwell, Jr. J.W., 1997, CWP/SU: Seismic Unix Release 1.6: a free package for seismic research and processing, Center for Wave Phenomena, Colorado School of Mines. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Soderberg, Nancy Contact_Organization: U.S. Geological Survey Contact_Position: Data Library Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: nsoderberg@usgs.gov Resource_Description: U.S. Geological Survey CD-ROM Open-File Report Data Archive Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ISO 9660 CD-ROM Format_Version_Number: ISO 9660 Format_Information_Content: SEG-Y File_Decompression_Technique: none Transfer_Size: 650 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.3133/ofr98351 Access_Instructions: The first link is to download the ZIP file containing all the shapefile components, the second link is to the data catalog page where individual files can be selected, and the third link is to the DOI of the report. Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9660 Compatibility_Information: UNIX, DOS, MAC Digital_Form: Digital_Transfer_Information: Format_Name: ZIP Format_Information_Content: ZIP file containing the full CD-ROM contents with a separate ZIP file for Disc 1 and Disc 2. The size reflects the first CD, while the second CD is 290 MB. Transfer_Size: 650 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.3133/ofr98351 Access_Instructions: The link is to the page where each disc of the 2 CD-ROM set is available as a ZIP download file. Digital_Form: Digital_Transfer_Information: Format_Name: SEG-Y Format_Information_Content: ZIP file containing the full CD-ROM contents with a separate ZIP file for Disc 1 and Disc 2. The size reflects the first CD, while the second CD is 290 MB. Transfer_Size: 650 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.3133/ofr98351 Access_Instructions: The link is to the page where each disc of the 2 CD-ROM set is available as a ZIP download file. Digital_Form: Digital_Transfer_Information: Format_Name: TEXT Format_Information_Content: ZIP file containing the full CD-ROM contents with a separate ZIP file for Disc 1 and Disc 2. The size reflects the first CD, while the second CD is 290 MB. Transfer_Size: 650 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.3133/ofr98351 Access_Instructions: The link is to the page where each disc of the 2 CD-ROM set is available as a ZIP download file. Fees: none Metadata_Reference_Information: Metadata_Date: 20250813 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Twichell, Dave Contact_Organization: U.S. Geological Survey Contact_Position: Seafloor Mapping Group Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the metadata contact is no longer with the U.S. Geological Survey. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998