Identification_Information: Citation: Citation_Information: Originator: Stanley D. Locker Originator: Arnell S. Forde Originator: Christopher G. Smith Publication_Date: 20181001 Title: Subbottom and Sidescan Sonar Data Acquired in 2015 From Grand Bay, Mississippi and Alabama Geospatial_Data_Presentation_Form: multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P9374DKQ Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Online_Linkage: https://doi.org/10.5066/P9374DKQ Description: Abstract: From May 28 to June 3, 2015, the U.S. Geological Survey (USGS) conducted a geophysical survey to investigate the geologic evolution and estuarine sediment thickness in Grand Bay, Alabama and Mississippi. Specific objectives were to document the age and accumulation patterns of estuarine sediment to advance our understanding of sediment exchange with the adjacent marsh and sources of sediment to the coastal ocean. This investigation is part of the USGS Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES) project. SSIEES seeks to better understand material exchange between marshes and adjacent estuarine water bodies along the northern Gulf of Mexico and the Atlantic coast, and determine the role extreme events (hurricanes, floods, and strong frontal systems) and sea-level change have on coastal change. This publication serves as an archive of unprocessed, digital chirp subbottom and sidescan sonar data, geographic information system (GIS) data and formal Federal Geographic Data Committee (FGDC) metadata, as well as processed sidescan sonar mosaics. Processed subbottom profile images are also provided in the "images" folder of 2015-315-FA_arc.zip. The archived subbottom trace data are in standard Society of Exploration Geophysicists (SEG) SEG Y revision 0 format (Barry and others, 1975) and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU). The raw sidescan sonar backscatter data are in standard eXtensible Triton Framework (XTF)format. These data are available for viewing using GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) multi-platform open source software. In addition, these data files can be downloaded from the USGS Coastal and Marine Geoscience Data System (https://cmgds.marine.usgs.gov). Purpose: To archive digital chirp subbottom, sidescan sonar data and associated files collected during Field Activity Number 2015-315-FA (project ID: 15CCT03). Additional survey and data details are available from the U.S. Geological Survey Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-315-FA. Supplemental_Information: All chirp systems use a signal of continuously varying frequency; the system used during this survey produces high-resolution, shallow-penetration (typically less than 75-milliseconds [ms]) profile images of sub-seafloor stratigraphy. The towfish contains a transducer that transmits and receives acoustic energy and is towed below the sea's surface. As transmitted acoustic energy intersects density boundaries, such as the seafloor or sub-surface sediment layers, energy is reflected toward the transducer, received, and recorded by a PC-based seismic acquisition system. The transmitted pulse is repeated at regular intervals (several times a second [s]) and returned energy is recorded for a specific duration (for example, 50 ms). In this way, a two-dimensional (2D) vertical image of the shallow geologic structure beneath the towfish is produced. The seismic source utilized during 2015-315-FA consisted of an EdgeTech SB-424 towfish running Discover version 4.0 acquisition software, towed off the port side of a 17’ Twin Vee Catamaran Center Consul Vessel. The layback and offset from the GPS antenna was 70 centimeters (cm) to port of the antenna, and 160 cm aft of the antenna. The data were acquired using a frequency sweep of 4-24 kilohertz (kHz), 1 millisecond pulse length at 100% power, and a recording length of 100 ms. Based on survey speeds of 3.5 knots, the shot spacing was approximately 0.450 m. The binary portion of the unprocessed seismic data is stored in SEG Y rev. 0, IBM float format, which is a standard digital format that can be read and manipulated by most seismic processing software packages; the first 3,200 bytes of the file header are in American Standard Code for Information Interchange (ASCII) format instead of Extended Binary Coded Decimal Interchange Code (EBCDIC) format. The SEG Y formatted trace files have a .sgy extension and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU) (Cohen and Stockwell, 2010). The printable profiles provided are chirp subbottom profile images that were processed using SU software. Survey Field Activity Collection System (FACS) and geophysical logs are also provided as supplemental information in the download file, 2015-315-FA_logs.zip. The sidescan sonar data was acquired using a Klein 3900 dual frequency (455 and 900 kHz) towfish and Klein SonarPro version 12.1 software that recorded the sidescan data in industry standard XTF format. The 455 kHz frequency data was utilized for this project. The layback and offset from the GPS antenna was 185 cm to starboard of the antenna, and 20 cm forward of the antenna Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150528 Ending_Date: 20150603 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.412144 East_Bounding_Coordinate: -88.317322 North_Bounding_Coordinate: 30.417417 South_Bounding_Coordinate: 30.342408 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: sub-bottom profiling Theme_Keyword: sidescan sonar Theme_Keyword: image mosaics Theme_Keyword: marine geology Theme_Keyword: geology Theme_Keyword: coastal processes Theme_Keyword: estuarine ecosystems Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: distributions Theme_Keyword: physical habitats and geomorphology Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords Theme_Keyword: seismic reflection profiling Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seismic reflection Theme_Keyword: chirp Theme_Keyword: Society of Exploration Geophysicists Theme_Keyword: SEG Y Theme_Keyword: 2015-315-FA Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Content Place_Keyword: United States of America Place_Keyword: Mississippi Place_Keyword: Alabama Place_Keyword: Gulf of Mexico Place_Keyword: Grand Bay 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 the data in future products or derivative research. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: Saint Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aforde@usgs.gov Data_Set_Credit: Funding and (or) support for this study was provided by the USGS Coastal and Marine Geology Program. This document was improved by reviews from Nancy DeWitt of the USGS - St. Petersburg, Florida. Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Environmental Systems Research Institute (Esri) ArcGIS 10.3.1.4959 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://www.seg.org/publications/tech-stand/ Cross_Reference: Citation_Information: Originator: Cohen, J.K., and Stockwell, J.W., Jr., CWP/SU Publication_Date: 2010 Title: Seismic Un*x Release No. 44: An open source software package for seismic research and processing Publication_Information: Publication_Place: Golden, Colorado Publisher: Center for Wave Phenomena, Colorado School of Mines Online_Linkage: https://github.com/JohnWStockwellJr/SeisUnix Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The validity or accuracy of marine subbottom profiles is highly qualitative and dependent on equipment and operating condition variables. Visual inspection of the images rendered from the data did not show major anomalies. Logical_Consistency_Report: These datasets are from one field activity with consistent instrument calibrations. Completeness_Report: A total of 126 chirp SEG Y data files and 143 sidescan XTF data files were collected during this survey. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal position accuracy was obtained using an Ashtech differential global positioning system (DGPS). Navigation on pre-determined tracklines were imported into HYPACK version 15.0.1.1 acquisition software and followed during seismic data collection. As the subbottom data were acquired, vessel position was recorded in real-time kinematic (RTK) mode. Positions were recorded and written to seismic trace headers in latitude and longitude coordinates (World Geodetic System of 1984, WGS84) every 1 second (s). The approximate 2-m offset between the chirp shot and ship's GPS was not accounted for during acquisition. 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 the chirp towfish position, not to the sea surface. Lineage: Process_Step: Process_Description: Chirp processing: The SEG Y data were processed with Seismic Unix (Release 44) software to produce gained Graphics Interchange Format (GIF) images of the subbottom profiles included in this data release. A representative chirp data processing sequence consisted of (1) removing navigation data for each shot and converting the SEG Y file to SU format, (2) applying automatic gain control, (3) generating a PostScript image of the traces, and (4) converting the PostScript image to a GIF image. Source_Used_Citation_Abbreviation: SEG Y Process_Date: 2016 Source_Produced_Citation_Abbreviation: SEG Y.gif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: 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: aforde@usgs.gov Process_Step: Process_Description: Navigation processing: Location data were extracted from the SEG Y headers using Seismic Unix software and output as ASCII text files; PROJ.4.7.0 (http://trac.osgeo.org/proj/) software was used to project WGS84 latitude and longitude coordinates to Universal Transverse Mercator (UTM) northings and eastings (WGS84, Zone 16, meters). Raw navigation files for each seismic line, saved by Julian Day (JD) and line number, were concatenated into comma-delimited text files for use with Esri ArcGIS software. The final output files are as follows: (1) 15cct03.txt contains unique shotpoint positions (along each line) for the entire survey, (2) s15cct03.txt includes the 1,000-shot-interval locations that were generated to correlate shot locations on the trackline map with evenly spaced 1,000-shot index markers along the top of the printable profile images, and (3) 15cct03_s has the start-of-line locations for each trackline. The concatenated, comma-delimited text files were later imported into ArcGIS and saved as either a point or polyline file (in Esri's shapefile format) for use in the map document (.mxd) included in this archive. Source_Used_Citation_Abbreviation: JD*.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: 15cct03.txt Source_Produced_Citation_Abbreviation: s15cct03.txt Source_Produced_Citation_Abbreviation: 15cct03_s.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: 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: aforde@usgs.gov Process_Step: Process_Description: Sidescan processing: XTF data files were loaded into CleanSweep version 3.9 (Oceanic Imaging Consultants, Inc.) for processing and mosaic creation. The WGS84 latitude and longitude coordinates were projected to Universal Transverse Mercator (UTM) northings and eastings (WGS84, Zone 16, meters) on import. The towfish position was also corrected for layback and offset relative to the GPS antenna. Processing steps included bottom tracking, angle varying gain, and swath trimming. A mosaic that combined all data coverage was produced at a resolution of 0.30 meters per pixel. Edits were made to the final Tagged Image File Format (TIFF) files (included in the 30cmgray folder) to optimize the merged imagery. The backscatter intensity is represented by a gray-scale pallete with high backscatter intensities as darker grays. Please see the readme file included in 2015-315-FA_SSSMosaic.zip for additional details. Source_Used_Citation_Abbreviation: 15CCT03_SSS_*.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: 30cmgold_LFSS.tif, 30cmgray_LFSS.tif Source_Produced_Citation_Abbreviation: UpRiver30cmgold_LFSS.tif, UpRiver30cmgray_LFSS.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: 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: aforde@usgs.gov Process_Step: Process_Description: Trackline map creation: GrandBay_Seismic.mxd was created with Esri ArcGIS 10.3.1 software. The survey navigation file, 15cct03.txt, was imported into ArcMap 10.3.1 and processed using the ArcScript "Points to Lines" to create a polyline shapefile of the cruise tracklines called 15cct03_trkln. The 1,000-shot-interval file (s15cct03.txt) and the start-of-line file (15cct03_s.txt) were imported into ArcMap and saved as point shapefiles 15cct03_shots and 15cct03_sol, respectively. The ArcGIS files included in this release are unprojected (geographic coordinates, WGS84). Please refer to the shapefile metadata and readme file, included in 2015-315-FA_arc.zip, for detailed information about the geospatial files provided in this data release. Source_Used_Citation_Abbreviation: 15cct03.txt Source_Used_Citation_Abbreviation: s15cct03.txt Source_Used_Citation_Abbreviation: 15cct03_s.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: 15cct03_trkln.shp Source_Produced_Citation_Abbreviation: 15cct03_shots.shp Source_Produced_Citation_Abbreviation: 15cct03_sol.shp Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: 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: aforde@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197872355 Longitude_Resolution: 0.0228113388 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS 1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 15cct03_shots.shp Entity_Type_Definition: This point shapefile contains the survey 1,000-shot-interval locations that were generated to correlate shot locations on the trackline map with evenly spaced 1,000-shot index markers along the top of the printable profile images. Entity_Type_Definition_Source: SEG Y headers http://www.seg.org/publications/tech-stand. Attribute: Attribute_Label: UTMX Attribute_Definition: UTM-X coordinate (Zone 16) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 364397 Range_Domain_Maximum: 373384 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UTMY Attribute_Definition: UTM-Y coordinate (Zone 16) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3357593 Range_Domain_Maximum: 3365867 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Line Attribute_Definition: Trackline number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: The naming convention used for each subbottom line is as follows: ###_xy, where '###' is the integer assigned on the Julian Day (JD) of data collection, 'x' is a 1- or 2-digit number representing a specific trackline number, and 'y' is a variable representing a new line if recording was prematurely terminated or reran for quality or acquisition problems. Attribute: Attribute_Label: Shot Attribute_Definition: Shotpoint number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1000 Range_Domain_Maximum: 18000 Attribute: Attribute_Label: Lon Attribute_Definition: Longitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -88.411344 Range_Domain_Maximum: -88.317897 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Lat Attribute_Definition: Latitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 30.342872 Range_Domain_Maximum: 30.417325 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: YEAR Attribute_Definition: Year Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2015 Range_Domain_Maximum: 2015 Attribute: Attribute_Label: DOYHRMINSEC Attribute_Definition: Day of year:hour:minute:second Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Day of year, hour, minute and second of data acquisition Detailed_Description: Entity_Type: Entity_Type_Label: 15cct03_sol.shp Entity_Type_Definition: This point shapefile contains the survey start-of-line locations for each trackline. Entity_Type_Definition_Source: SEG Y headers http://www.seg.org/publications/tech-stand. Attribute: Attribute_Label: UTMX Attribute_Definition: UTM-X coordinate (Zone 16) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 364349 Range_Domain_Maximum: 373393 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UTMY Attribute_Definition: UTM-Y coordinate (Zone 16) Attribute_Definition_Source: Universal Transverse Mercator Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3357632 Range_Domain_Maximum: 3365862 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Line Attribute_Definition: Trackline number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: The naming convention used for each subbottom line is as follows: ###_xy, where '###' is the integer assigned on the Julian Day (JD) of data collection, 'x' is a 1- or 2-digit number representing a specific trackline number, and 'y' is a variable representing a new line if recording was prematurely terminated or reran for quality or acquisition problems. Attribute: Attribute_Label: Shot Attribute_Definition: Shotpoint number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 11685 Attribute: Attribute_Label: Lon Attribute_Definition: Longitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -88.411819 Range_Domain_Maximum: -88.317753 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Lat Attribute_Definition: Latitude (decimal degrees) Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 30.343211 Range_Domain_Maximum: 30.417281 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: YEAR Attribute_Definition: Year Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2015 Range_Domain_Maximum: 2015 Attribute: Attribute_Label: DOYHRMINSEC Attribute_Definition: Day of year:hour:minute:second Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Day of year, hour, minute and second of data acquisition Detailed_Description: Entity_Type: Entity_Type_Label: 15cct03_trkln.shp Entity_Type_Definition: Survey trackline file Entity_Type_Definition_Source: SEG Y headers http://www.seg.org/publications/tech-stand. Attribute: Attribute_Label: Line Attribute_Definition: Trackline number Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: The naming convention used for each subbottom line is as follows: ###_xy, where '###' is the integer assigned on the Julian Day (JD) of data collection, 'x' is a 1- or 2-digit number representing a specific trackline number, and 'y' is a variable representing a new line if recording was prematurely terminated or reran for quality or acquisition problems. Attribute: Attribute_Label: Image Attribute_Definition: Graphics Interchange Format (GIF) Image Name Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: This attribute field provides the names of the subbottom profile image (*.gif) that is associated with each trackline via a hyperlink in ArcMap. Overview_Description: Entity_and_Attribute_Overview: Binary data file: Seismic trace data are available as binary files in SEG Y format. These files have a .sgy extension and range in size from 0.804 to 99 MB. These data are included in the download file, 2015-315-FA_segy.zip, and can also be found by going to https://cmgds.marine.usgs.gov. 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. Entity_and_Attribute_Overview: Graphic image file: Printable versions of the processed subbottom profiles are available as GIF images and are included in the "images" folder of the download file, 2015-315-FA_arc.zip. Entity_and_Attribute_Overview: GIS file: The GIS data associated with this survey are provided as a compressed zip file, 2015-315-FA_arc.zip, which is composed of an Esri map document, shapefiles, a folder for the processed profile images, shapefile metadata and a readme file. The shapefiles provided may also be viewed using other versions of Esri desktop software including their free software Explorer for ArcGIS, which is available at http://www.esri.com/software/arcgis/explorer/index.html. Entity_and_Attribute_Detail_Citation: The entity and attribute information was generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Contact_Instructions: The SEG Y files are also downloadable from the Coastal and Marine Geoscience Data System https://cmgds.marine.usgs.gov. Resource_Description: 15cct03.txt, s15cct03.txt, 15cct03_S.txt, 15cct03_trkln.shp, 15cct03_shots.shp, 15cct03_sol.shp, 30cmgold_LFSS.tif, UpRiver30cmgold_LFSS.tif, 30cmgray_LFSS.tif, UpRiver30cmgray_LFSS.tif, *.sgy, *.xtf Distribution_Liability: This publication was prepared by an agency of the United States Government. Although these data were 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 Format_Version_Number: Revision 0 File_Decompression_Technique: Winzip or 7zip Transfer_Size: 3340 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9374DKQ/data/2015-315-FA_segy.zip Digital_Form: Digital_Transfer_Information: Format_Name: SHP (Esri shapefile) File_Decompression_Technique: Winzip or 7zip Transfer_Size: 61.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9374DKQ/data/2015-315-FA_arc.zip Digital_Form: Digital_Transfer_Information: Format_Name: XTF File_Decompression_Technique: Winzip or 7zip Transfer_Size: 9360 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9374DKQ/data/2015-315-FA_xtf.zip Digital_Form: Digital_Transfer_Information: Format_Name: TIFF File_Decompression_Technique: Winzip or 7zip Transfer_Size: 578.4 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P9374DKQ/data/2015-315-FA_SSSMosaic.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: 20181001 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Arnell S. Forde Contact_Organization: U.S. Geological Survey Contact_Position: Geologist 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: aforde@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998