Metadata: Identification_Information: Citation: Citation_Information: Originator: Stephen T. Bosse Originator: James G. Flocks Originator: Arnell S. Forde Publication_Date: 20180213 Title: Archive of Digitized Analog Boomer and Minisparker Seismic Reflection Data Collected from the Northern Gulf of Mexico: 1981, 1990 and 1991 Geospatial_Data_Presentation_Form: Multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F7CN730G Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7CN730G Description: Abstract: The U.S. Geological Survey (USGS) Coastal and Marine Geology Program has actively collected geophysical and sedimentological data in the northern Gulf of Mexico for several decades, including shallow subsurface data in the form of high-resolution seismic reflection profiles (HRSP). Prior to the mid-1990s most HRSP data were collected in analog format as paper rolls of continuous profiles up to 25 meters long. As part of the National Geological and Geophysical Data Preservation Program (https://datapreservation.usgs.gov/), and in collaboration with the Bureau of Ocean Energy Management, Marine Minerals Program, scientists at the USGS St. Petersburg Coastal and Marine Science Center were converting the analog paper records to digital format using a large-format continuous scanner. The image files created by scanning were further processed to fix distortions and crop out blank spaces to create industry standard Society of Exploration Geophysicists date exchange (SEG-Y) format. This data release serves as an archive of HRSP profiles annotated with header information, converted SEG-Y files, navigation data, and cruise trackline shapefiles. The HRSP data were collected using a minisparker/hydrophone system onboard the research vessel Gyre and a Huntec boomer seismic system onboard research vessels (R/V) Carancahua and Kit Jones. Data collection dates and locations varied between surveys: (1) R/V Carancahua (legs 1 and 2) surveys were conducted July 1–15, 1981, within Chandeleur and Mississippi Sounds, (2) the R/V Gyre 81-6 cruise occurred April 9–23, 1981, in the Gulf of Mexico (south of Mississippi and east of Louisiana), (3) R/V Kit Jones 90 (legs 1 and 2) data were acquired from Mississippi Sound and the Gulf of Mexico (south of Mississippi and Alabama) June 21–27, 1990, and (4) R/V Kit Jones 91-2 HRSP data came from Mississippi Sound (south of Alabama) and the Gulf of Mexico (south of Alabama and Florida) from July 10 to 11 and July 21–27, 1991. Data collection and processing methods are described in USGS Data Series 1047. Purpose: To archive all digitized analog boomer seismic profile data and associated files collected along the northern Gulf of Mexico, during the R/V Carancahua, Gyre, and Kit Jones geophysical cruises. Supplemental_Information: The USGS Saint Petersburg Coastal and Marine Science Center (SPCMSC) currently holds 13 major geophysical surveys from the northern Gulf of Mexico in its paper repository. A conservative estimate of 2,000 line-kilometers (km) of data are available. Paper copies of data are difficult and expensive to duplicate and share with other facilities, and cannot be analyzed using standard GIS and interpretative software. Conversion of this data into a usable digital format is necessary to archive the geologic information that otherwise might be lost, requiring additional redundant and expensive marine geophysical surveys. The USGS National Geological and Geophysical Data Preservation Program (NGGDPP, http://datapreservation.usgs.gov) addresses the need to preserve, catalog, and provide access to geological and geophysical data for scientific research and economic development. In addition to the current efforts under the NGGDPP, four geophysical investigations from the 1980s and 1990s were previously archived through a preservation project in collaboration with the Bureau of Ocean Energy Management (Harrison and others, 2007; Sanford and others, 2009a, b, c). The USGS-SPCMSC scans its analog HRSP holdings using a large-format continuous scanner. The analog to digital conversion process used for this dataset is similar to the processes used previously in Harrison and others (2007) and Sanford and others (2009a, b, c). The digital files were converted into Tagged Image File Format (TIFF) for standard accessibility by raster image processors. The TIFF images of the seismic profiles were also converted into SEG-Y format. This standard non-proprietary format is the accepted industry standard for seismic data, and can be accessed by all major seismic data processing and interpretation systems. Accompanying the HRSP are navigation and metadata files, which are generated for use in GIS, database and Internet Message Access Protocol (IMAP) services. Processed seismic profile images are also provided. The processed profiles provided in this data release are Portable Document Format (PDF) images that were created using Seismic Unix and/or Imagemagick software. The northern Gulf of Mexico is a passive continental margin, where minimal structural change to the shallow stratigraphy has occurred during the last few thousand years (Anderson and others, 2004). Therefore, subsurface data collected from this environment for the purposes of geologic assessment can be considered useful in perpetuity. The geologic information collected by the USGS in the northern Gulf of Mexico remains a valuable resource for sea floor and stratigraphic investigations, and is continuously revisited by researchers interested in Holocene and recent earth processes. For example, decades-old geologic data is commonly used in sediment resource studies in coastal Louisiana (for example, Kindinger and others, 2001; Kulp and others, 2002; Rogers and others, 2009) and previously collected datasets across the Mississippi-Alabama shelf have been used in recent geologic-framework assessments (Roberts and others, 2004; Greene and others, 2007; Flocks and others, 2011). The seismic data for three of the cruises (Carancahua and both Kit Jones) were collected using a single-channel Huntec boomer/benthos hydrophone system with Ocean Research Equipment (ORE) Geopulse power supply. The system consists of an electromechanical sound source mounted on a catamaran sled towed behind the vessel at the water surface. The seismic data for the Gyre cruise were collected using a minisparker/hydrophone system. Sparkers create sound waves from a collapsing bubble, which is a result of vaporizing water between a positive and negative leads (Trabant, 1984). The signal emitted from either sound source is received by a 5 meter (m)-long hydrophone streamer towed alongside the sled. The received signal was recorded in one of two ways. For older cruises, the signal went straight to a graphic recorder, while in the most recent cruises, the signal is processed into response amplitudes via a topside computer running the acquisition software; the settings varied by cruise for both methods. The seismic returns were printed onto paper rolls as two-dimensional profiles representing shots horizontally (time along track) and depth (two-way travel time). Geographic positioning of the system was collected using a long-range navigation (LORAN) system and annotated onto the paper copies. Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 19810701 Single_Date/Time: Calendar_Date: 19810409 Single_Date/Time: Calendar_Date: 19900621 Single_Date/Time: Calendar_Date: 19910721 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -89.1935 East_Bounding_Coordinate: -86.208 North_Bounding_Coordinate: 30.3786 South_Bounding_Coordinate: 28.9666 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:1eabaa00-06b5-4654-bbd7-f14a3d6c1bdb Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificinformation Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geology Theme_Keyword: geology Theme_Keyword: sediment transport Theme_Keyword: ocean processes Theme_Keyword: coastal processes Theme_Keyword: seismic reflection methods Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Marine Theme_Keyword: Society of Exploration Geophysicists Theme_Keyword: SEG-Y Theme_Keyword: BIM (Barrier Island Mapping) Theme_Keyword: R/V Carancahua Theme_Keyword: R/V Gyre Theme_Keyword: R/V Kit Jones Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Content Place_Keyword: United States of America Place_Keyword: Gulf of Mexico Place_Keyword: Louisiana Place_Keyword: Mississippi Place_Keyword: Alabama Place_Keyword: Florida Place_Keyword: Mississippi Sound Place_Keyword: Chandeleur Sound Access_Constraints: None. These data are held in the public domain. Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Cross_Reference: Citation_Information: Originator: Anderson, J.B., Rodriguez, A., Abdulah, K.C., Fillon, R.H., Banfield, L.A., McKeown, H.A., and Wellner, J.S. Publication_Date: 2004 Title: Late Quaternary stratigraphic evolution of the northern Gulf of Mexico margins—A synthesis, in Anderson, J., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the Northern Gulf of Mexico Series_Information: Series_Name: Society for Sedimentary Geology Issue_Identification: 79 Other_Citation_Details: pages 1-23 Online_Linkage: http://doi.org/10.2110/pec.04.79.0001 Cross_Reference: Citation_Information: Originator: Barry, K.M., Cavers, D.A., and Kneale, C.W. Publication_Date: 1975 Title: Recommended standards for digital tape formats Series_Information: Series_Name: Geophysics Issue_Identification: v. 40, no. 2 Other_Citation_Details: pages 344-352 Online_Linkage: http://library.seg.org/doi/pdf/10.1190/1.1440530 Cross_Reference: Citation_Information: Originator: Bosse, S.T., Flocks, J.G., Forde, A.S. Publication_Date: 20170421 Title: Digitized analog boomer seismic-reflection data collected during U.S. Geological Survey cruises Erda 90-1_HC, Erda 90-1_PBP, and Erda 91-3 in Mississippi Sound, June 1990 and September 1991 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 1047 Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ds1047 Cross_Reference: Citation_Information: Originator: Flocks, J.G., Ferina, N.F., and Kindinger, J.L. Publication_Date: 2009 Title: Recent geologic framework and geomorphology of the Mississippi-Alabama shelf, northern Gulf of Mexico, in, Buster, N.A., and Holmes, C.W., eds., Gulf of Mexico origin, waters, and biota: Volume III, Geology Series_Information: Series_Name: College Station, Texas, Texas A&M University Press Issue_Identification: 3 Other_Citation_Details: pages 157-173 Online_Linkage: https://muse.jhu.edu/book/1783 Cross_Reference: Citation_Information: Originator: Greene, D.L., Jr., Rodriquez, A.B., and Anderson, J.B. Publication_Date: 2007 Title: Seaward-branching coastal-plain and piedmont incised-valley systems through multiple sea-level cycles: Late Quaternary examples from Mobile Bay and Mississippi Sound, U.S.A Series_Information: Series_Name: Journal of Sedimentary Research Issue_Identification: 77 Other_Citation_Details: pages 139-158 Online_Linkage: http://jsedres.geoscienceworld.org/content/77/2/139 Cross_Reference: Citation_Information: Originator: Harrison, A.S., Dadisman, S.V., Kindinger, J.L., Morton, R.A., Blum, M.D., Wiese, D.S., and Subino, J.A. Publication_Date: 2007 Title: Archive of digital and digitized analog boomer seismic reflection data collected during USGS cruise 96CCT02 in Copano, Corpus Christi, and Nueces Bays and Corpus Christi Bayou, Texas, July 1996 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 296 Online_Linkage: https://pubs.usgs.gov/ds/296/ Cross_Reference: Citation_Information: Originator: Kindinger, J.L., Flocks, J.G., Kulp, M.A., Penland, P.S., and Britsch, L.D. Publication_Date: 2001 Title: Sand resources, regional geology, and coastal processes for the restoration of the Barataria barrier shoreline Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2001-384 Other_Citation_Details: 69 pages Online_Linkage: https://pubs.er.usgs.gov/publication/ofr01384 Cross_Reference: Citation_Information: Originator: Kulp, M.A., Howell, P.D., Adiau, S., Penland, P.S., Kindinger, J.L., and Williams, S.J. Publication_Date: 2002 Title: Latest Quaternary stratigraphic framework of the Mississippi River delta region Series_Information: Series_Name: Gulf Coast Association of Geological Societies Transactions Issue_Identification: 52 Other_Citation_Details: pages 573-582 Online_Linkage: http://archives.datapages.com/data/gcags/data/052/052001/0573.htm#a1 Cross_Reference: Citation_Information: Originator: Roberts, H.H., Fillon, R.H., Kohl, B., Robalin, J.M., and Sydow, J.C. Publication_Date: 2004 Title: Depositional architecture of the Lagniappe Delta:Sediment characteristics, timing of depositional events, and temporal relationship with adjacent shelf-edge deltas, in Anderson, J.B., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the northern Gulf of Mexico Series_Information: Series_Name: Society for Sedimentary Geology Issue_Identification: 79 Other_Citation_Details: pages 142-189 Online_Linkage: http://archives.datapages.com/data/sepm_sp/SP79/Depositional_Architecture_of_the_Lagniappe_Delta.pdf Cross_Reference: Citation_Information: Originator: Rogers, B.E., Kulp, M.A., and Miner, M.D. Publication_Date: 2009 Title: Late Holocene chronology, origin, and evolution of the St. Bernard shoals, northern Gulf of Mexico, USA Series_Information: Series_Name: Geo-Marine Letters Issue_Identification: 29 Other_Citation_Details: pages 379-394 Online_Linkage: http://link.springer.com/article/10.1007/s00367-009-0162-6 Cross_Reference: Citation_Information: Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G. Publication_Date: 2009 Title: Archive of digitized analog boomer seismic reflection data collected from the Mississippi-Alabama-Florida shelf during cruises onboard the R/V Kit Jones, June 1990 and July 1991 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 429 Other_Citation_Details: 2009a Online_Linkage: https://pubs.usgs.gov/ds/429/ Cross_Reference: Citation_Information: Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G. Publication_Date: 2009 Title: Archive of digitized analog boomer and minisparker seismic reflection data collected from the Alabama-Mississippi-Louisiana shelf during cruises onboard the R/V Carancahua and R/V Gyre, April and July, 1981 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 428 Other_Citation_Details: 2009b Online_Linkage: https://pubs.usgs.gov/ds/428/ Cross_Reference: Citation_Information: Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G. Publication_Date: 2009 Title: Archive of digitized analog boomer seismic reflection data collected from Lake Pontchartrain, Louisiana, to Mobile Bay, Alabama, during cruises onboard the R/V ERDA-1, June and August 1992 Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 370 Other_Citation_Details: 2009c Online_Linkage: https://pubs.usgs.gov/ds/370/ Cross_Reference: Citation_Information: Originator: Trabant, P.K. Publication_Date: 1984 Title: Applied High-Resolution Geophysical Methods Publication_Information: Publication_Place: Dordrecht, Netherlands Publisher: Springer Netherlands Online_Linkage: http://www.springer.com/us/book/9789027718501 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The validity or accuracy of boomer and minisparker profiling data is highly qualitative and depends on equipment and operating condition variables. Visual inspection of the images rendered from the data did not show any major anomalies. Logical_Consistency_Report: This dataset is from four field activities with consistent instrument calibrations. Instances where there are Profile with Header tiffs that have no associated SEG-Y file are due to lack of navigation data. Instances where there are multiple SEG-Y files associated with a single Profile with Header tiff are due to sweep changes along that particular line. Completeness_Report: These data were collected along tracklines (2-D) and are therefore inherently incomplete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: As the seismic reflection data were acquired, the position of the vessel was recorded using a LORAN-C system. The accuracy of the LORAN-C varied from 528 to 1,320 feet (ft), with repeatable accuracy between 60 and 300 ft. Positions were recorded in latitude and longitude coordinates at various intervals and appear on the seismic profiles as incremental, hand-annotated vertical event marks. Navigation data were obtained as .dat files and saved as tab-delimitated text files. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: These data are not to be used for bathymetry. Two-way travel (TWT) times shown on the printable profile images are relative to local sea level at the time of data acquisition. Lineage: Process_Step: Process_Description: Raw data scanning - The seismic data collected during each survey is currently located in the SPCMSC archives and arranged in cruise-specific storage boxes. The analog boomer and minisparker data is in the form of 50 centimeter (cm)-wide paper rolls, paper fan-folds, and vellum rolls. The various rolls can be up to 20 m long and contain multiple seismic tracklines. The rolls contain the seismic profile image with pertinent collection characteristics annotated during acquisition, such as shot number and time and may also include environmental conditions and equipment details. Horizontal lines across the profiles represent two-way travel time in milliseconds (ms), and vertical lines represent navigation fixes acquired and annotated as the survey was underway. The raw data were scanned on a Crystal TX 40" (1394) continuous-feed scanner. Using the WIDEimage 2.8.1 program, the scans were saved as black and white adaptive TIFF files at 200 dots-per-inch (dpi) resolution. Trackline segment images were reprocessed in Adobe Photoshop CC 2017 to increase DPI to 210 and convert to 8-bit grayscale. The raw navigation data were imported into Esri ArcGIS version 10.3 as point data. For mapping trackline purposes the point shapefiles were converted to lines using the “make polylines from points” tool from the XTools Pro version 12.2 (build 2197) toolbar. Source_Used_Citation_Abbreviation: TIFF Process_Date: 2017 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Process_Step: Process_Description: Cropping - The scanned TIFF images were imported into Adobe Photoshop (Ps) Creative Cloud 2017 and blank edge areas were cropped out to further reduce file size. For rolls that included more than one line of seismic data, the file was separated into individual lines. Separation was completed by cropping everything except for the line of interest, determined by the raw navigation information, from the original scan and saving it as a new file with its associated line name. The file naming convention is as follows: CruiseID-DataAssociation_trackline#.tif (for example, 81GY6-SEGY_4.tif). It includes the cruise identification (81GY6), data association (PWH [profiles with headers] or SEGY), and trackline number (sometimes this also includes a subsection letter after the line number for tracklines split between multiple rolls). Source_Used_Citation_Abbreviation: TIFF Process_Date: 2017 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Process_Step: Process_Description: Headers - Each image of the scanned seismic profiles also includes a header with associated information including cruise- and line-specific information and processing details. The header files were created in Microsoft Word 2010, exported as PDF files, appended to the far left of the image frame in Adobe Photoshop, and then flattened onto the image to reduce file size. The final TIFF images with attached header files are available for download from Bosse and others (2017). Process_Date: 2017 Source_Produced_Citation_Abbreviation: CruiseID-PWH_trackline#.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Process_Step: Process_Description: Correcting scan distortion - Distortion correction is necessary because it is difficult to ensure vellum rolls are fed into the scanner straight, distortion correction is obtained by placing a line over the 0 ms line (water level) on the scan. It is important that horizontal lines are perpendicular to the vertical lines on the scans or the image to SEG-Y conversion will not be accurate. The distortion was corrected by using the Rectangular Marquee Tool in Adobe Photoshop to select and create a new layer of the distorted area of the scan. A skewed transform was performed and the corrected images were saved into a new folder without layers (flattened) to reduce file size. Source_Used_Citation_Abbreviation: TIFF Process_Date: 2017 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Process_Step: Process_Description: Image to SEG-Y - The scanned, distortion-corrected images were converted to digital SEG-Y (.seg) format (revision 0) (Barry and others, 1975) using the proprietary software ImageToSEGY 2.2 (Chesapeake Technology). The scanned images were opened in ImageToSEGY and the export area was defined by assigning values to the top, bottom, left, and right pixel locations using the imaged water surface (0 ms), maximum two-way travel time (for example 112.5 ms) and raw navigation data for each line. Trace amplitudes in the scanned profiles are represented by pixels, so each pixel becomes a trace sample and the sample rate of the converted SEG-Y version is the record length divided by the number of vertical pixels in the profile. For example, if the profile is 4,435 pixels vertically and the two-way travel time is 112.5 ms, then the sample rate for the SEG-Y file version is 0.000025 s. Source_Used_Citation_Abbreviation: SEG Process_Date: 2017 Source_Produced_Citation_Abbreviation: CruiseID-SEGY_trackline#.seg Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Process_Step: Process_Description: Process_Description: Seismic processing: The SEG-Y data were processed with Seismic Unix (Release 44) software to produce PDF images of the seismic profiles included in this data release. A representative data processing sequence consisted of (1) converting the SEG-Y file to SU format, (2) applying horizontal (number of traces) and vertical (two-way travel time) scales and generating a PostScript image of the traces, (3) converting the header file to a PostScript image then merging with the seismic image, and (4) converting the merged PostScript image to a PDF file. Source_Used_Citation_Abbreviation: SEG-Y Process_Date: 2017 Source_Produced_Citation_Abbreviation: *_scale.pdf Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: James G. Flocks Contact_Organization: U.S. Geological Survey Contact_Position: Research Geologist Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: jflocks@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 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: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity Point Point_and_Vector_Object_Count: 12592 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197898369 Longitude_Resolution: 0.0226493920 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: North American Datum 1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 81CA_CruiseTracklines.shp, 81GY6_CruiseTracklines.shp, 90KI_CruiseTracklines.shp, 91KI2_CruiseTracklines.shp, 81CA_Navigation.xls, 81GY6_Navigation.xls, 90KI_Navigation.xls, 91KI2_Navigation.xls Entity_Type_Definition: Shapefile and navigation containing seismic profile data Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Feature ID Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Point Attribute: Attribute_Label: DATE Attribute_Definition: Date associated with each shot Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 04/09/1981 Range_Domain_Maximum: 07/27/1991 Attribute: Attribute_Label: D Attribute_Definition: Julian Date Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 99 Range_Domain_Maximum: 208 Attribute: Attribute_Label: H Attribute_Definition: Hour Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 23 Attribute: Attribute_Label: M Attribute_Definition: Minute Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 59 Attribute: Attribute_Label: LAT Attribute_Definition: Latitude (NAD83) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28.9666 Range_Domain_Maximum: 30.3786 Attribute_Units_of_Measure: Decimal Degrees Attribute: Attribute_Label: LONG Attribute_Definition: Longitude (NAD83) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -89.1935 Range_Domain_Maximum: -86.2080 Attribute_Units_of_Measure: Decimal Degrees Attribute: Attribute_Label: Cruise Attribute_Definition: Cruise Identification Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string representing unique cruise ID Attribute: Attribute_Label: FIELD_ACT Attribute_Definition: Field activity number Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string representing unique field activity number Attribute: Attribute_Label: METHOD Attribute_Definition: Type of acoustic sound source Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Boomer and Minisparker Attribute: Attribute_Label: LEG Attribute_Definition: Leg of cruise Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 2 Attribute: Attribute_Label: LINE Attribute_Definition: Line number Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string representing unique line numbers ranging from 1 to 222 as well as a single line labeled as A. Attribute: Attribute_Label: FIXES Attribute_Definition: Fixed event numbers Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 660 Attribute: Attribute_Label: LINE_SEG Attribute_Definition: The segment of a line broken up into smaller portions Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: a Range_Domain_Maximum: j Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Contact_Instructions: This report is available online. The SEG-Y files are downloadable from the Coastal and Marine Geoscience Data System. Resource_Description: 81CA1_SEGY_*.seg, 81CA2_SEGY_*.seg, 81GY6_SEGY_*.seg, 90KI1_SEGY_*.seg, 90KI2_SEGY_*.seg, 91KI2_SEGY_*.seg, 81CA1_PWH_*.tif, 81CA2_PWH_*.tif, 81GY6_PWH_*.tif, 90KI1_PWH_*.tif, 90KI2_PWH_*.tif, 91KI2_PWH_*.tif, 81CA1_Navigation.xls, 81CA2_Navigation.xls, 81GY6_Navigation.xls, 90KI_Navigation.xls, 91KI2_Navigation.xls, 81CA1_CruiseTracklines.shp, 81CA2_CruiseTracklines.shp, 81GY6_CruiseTracklines.shp, 90KI_CruiseTracklines.shp, 91KI2_CruiseTracklines.shp Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SEG-Y, TIFF Format_Information_Content: The SEG-Y rev. 0 format (Barry and others, 1975) presented here consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an ASCII header block followed by a 400-byte binary header block, both of which include information specific to line and reel number; a trace data block that follows the reel identification header, with the first 240 bytes of each trace block consisting of the binary trace identification header; and seismic data samples that follow the trace identification header. File_Decompression_Technique: Unzip Transfer_Size: 9072 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/81CA_SEGY.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/81GY6_SEGY.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/90KI_SEGY.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/91KI2_SEGY.zip Digital_Form: Digital_Transfer_Information: Format_Name: SHP Format_Information_Content: The GIS project used to create the trackline map includes an Esri shapefile and metadata. Map documents (not included) were created with Esri ArcGIS 10.3 software. The provided shapefile may also be viewed using other versions of Esri desktop software including their free software or ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer/index.html). File_Decompression_Technique: unzip Transfer_Size: 12.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/81CA_CruiseTracklines.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/81GY6_CruiseTracklines.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/90KI_CruiseTracklines.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7CN730G/data/91KI2_CruiseTracklines.zip Fees: None Technical_Prerequisites: Use of SEG-Y data requires specialized seismic processing software, such as public domain software Seismic Unix (http://www.cwp.mines.edu/cwpcodes/index.html). Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Stephen T. Bosse Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey Contact_Position: Researcher I Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: sbosse@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998