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Data Series 972

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Identification_Information:
Citation:
Citation_Information:
Originator: Arnell S. Forde
Originator: James G. Flocks
Originator: Dana S. Wiese
Originator: Jake J. Fredericks
Publication_Date: 2015
Title:
Archive of digital chirp subbottom profile data collected during USGS cruise 14BIM05 offshore of Breton Island, Louisiana, August 2014
Geospatial_Data_Presentation_Form: Tabular, vector, and raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 972
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: https://dx.doi.org/10.3133/ds972
Description:
Abstract:
In August of 2014, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service (USFWS), conducted a geophysical survey offshore of Breton Island, Louisiana to investigate the geologic controls on barrier island framework and long-term sediment transport. Additional details related to this activity can be found by searching the USGS's Coastal and Marine Geoscience Data System (CMGDS), for field activity 2014-317-FA (also known as 14BIM05). This report serves as an archive of unprocessed digital chirp subbottom data, trackline maps, navigation files, GIS information, and formal FGDC metadata. Gained digital images of the seismic profiles are also provided. The archived 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). Example SU processing scripts and USGS software for viewing the SEG Y files (Zihlman, 1992) are also provided. 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, the SEG Y files can also be downloaded from the USGS Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).
Purpose:
To archive all digital chirp subbottom profile data and associated files collected during cruise 14BIM05.
Supplemental_Information:
The USGS Saint Petersburg Coastal and Marine Science Center (SPCMSC) - St. Petersburg, Fla., assigns a unique identifier to each cruise or field activity. The other ID associated with this activity, 14BIM05, indicates the data were collected in 2014 for the Barrier Island Mapping (BIM) study, during the fifth field activity for that project in that calendar year. Refer to http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html for a detailed description of the method used to assign the cruise ID. The naming convention used for each subbottom line is as follows: yyi##a, where 'yy' are the last two digits of the year in which the data were collected, 'i' is a 1-letter abbreviation for the equipment type (for example, i for 512i chirp), '##' is a 2-digit number representing a specific track, and 'a' is a letter representing a section of the line if recording was prematurely terminated or rerun for quality or acquisition problems. All Chirp systems use a signal of continuously varying frequency; the system used during this survey produced high-resolution, shallow-penetration (typically less than 50 milliseconds [ms]) profile images of sub-seafloor stratrigraphy. The towfish contains a transducer that transmits and receives acoustic energy and is typically towed 1–2 meters (m) below the sea surface. As transmitted acoustic energy intersects density boundaries, such as the seafloor or sub-surface sediment layers, some energy is reflected back toward the transducer, received, and recorded by a PC-based seismic acquisition system. This process is repeated at regular intervals (for example, 0.125 seconds (s)) and returned energy is recorded for a specific duration (for example, 50 ms). In this way, a two-dimensional (2-D) vertical image of the shallow geologic structure beneath the towfish is produced. The seismic source utilized during 14BIM05 consisted of an EdgeTech 512i towfish running Discover v. 4.10 acquisition software and towed about 20 m, behind the Global Positioning System (GPS) antenna. The data were acquired using a frequency sweep of 4–20 kilohertz (kHz), a 43 kHz sample frequency, a 40 ms record length on August 14, 2014 and a 65 ms record length for all other days. On the basis of survey speeds of 3.5 knots, the shot spacing was about 0.450 m. The binary portion of the unprocessed seismic data is stored in SEG Y rev. 0 (Barry and others, 1975), 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 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. The SEG Y files may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU) (Cohen and Stockwell, 2010). Also provided are example SU scripts that allow the user to remove navigation fixes from the SEG Y headers, along with a fix for every 1,000 shots, and produce a printable, gained Graphics Interface Format (GIF) image of each profile. The printable profiles provided are GIF images that were processed and gained using SU software. Refer to the Software page of this report for links to example SU processing scripts and USGS software for viewing the SEG Y files (Zihlman, 1992).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140814
Ending_Date: 20140817
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.215244
East_Bounding_Coordinate: -89.059858
North_Bounding_Coordinate: 29.477719
South_Bounding_Coordinate: 29.377028
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificinformation
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Geology
Theme_Keyword: Coastal information
Theme_Keyword: Marine
Theme_Keyword: Subbottom profile
Theme_Keyword: Seismic reflection
Theme_Keyword: Chirp
Theme_Keyword: Society of Exploration Geophysicists
Theme_Keyword: SEG Y
Theme_Keyword: Barrier Island Mapping
Theme_Keyword: BIM
Theme_Keyword: 14BIM05
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Content
Place_Keyword: United States of America
Place_Keyword: Louisiana
Place_Keyword: Breton Island
Place_Keyword: Gulf of Mexico
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
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: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 502-8000
Contact_Electronic_Mail_Address: aforde@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: https://pubs.usgs.gov/ds/0972/maps/14bim05_location.jpg
Browse_Graphic_File_Description:
Figure 2. Location map of all digital chirp subbottom data collected during USGS Field Activity 14BIM05. This map was created at a scale of 1:78,800.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Funding and (or) support for this study was provided by the USGS Coastal and Marine Geology Program and Louisiana Outer Coast Early Restoration Project. Funds for this report are part of project funds for the Louisiana Outer Coast Early Restoration Project, obtained by the natural resource trustees for the Deepwater Horizon Oil Spill, pursuant to the–Framework for Early Restoration Addressing Injuries Resulting from the Deepwater Horizon Oil Spill–executed April 20, 2011. USFWS is the project lead for the North Breton Island Barrier Island Restoration project. The authors thank the Research Vessel (R/V) Tommy Munro crew (University of Southern Mississippi/Gulf Coast Research Laboratory - Biloxi, Miss.) for their assistance in data collection. This document was improved by the reviews of Noreen Buster and Karen Morgan of the USGS - St. Petersburg, Fla. Disc Image Credit: Descloitres, J., Moderate Resolution Imaging Spectroradiometer (MODIS) Land Rapid Response Team at the–NASA–Goddard Space Flight Center, 2001, Louisiana.A2001361.1640.250m.jpg, accessed on July 10, 2015, at http://visibleearth.nasa.gov/view_rec.php?id=2364.
Cross_Reference:
Citation_Information:
Originator: Cohen, J.K., and Stockwell, J.W., Jr., CWP/SU
Publication_Date: 2010
Title:
Seismic Unix Release 41: A free package for seismic research and processing, Center for Wave Phenomena, Colorado School of Mines
Online_Linkage: http://www.cwp.mines.edu/cwpcodes/
Cross_Reference:
Citation_Information:
Originator: Zihlman, F.N., USGS
Publication_Date: 1992
Title:
DUMPSEGY V1.0: A program to examine the contents of SEG Y disk-image seismic data
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 92–590
Other_Citation_Details: 28 pages
Online_Linkage: http://pubs.er.usgs.gov/usgspubs/ofr/ofr92590
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/resources/publications/misc/technical-standards
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The validity or accuracy of marine subbottom profiles 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 one field activity with consistent instrument calibrations.
Completeness_Report:
These data are collected along tracklines (2-D) and are therefore inherently incomplete.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
As the subbottom data were acquired, the position of the vessel was continuously determined by a CodaOctopus F190 DGPS (Digital Global Positioning System) and subsequently sent to HYPACK 2010 navigation software to ensure a consistent grid spacing during data collection. Positions were recorded and written to trace headers in latitude and longitude coordinates about every 1 s using navigation from the CodaOctopus F190 receiver with OmniSTAR High Performance (HP) correction (accurate to within 20 centimeters (cm)). The approximately 20-m offset between the chirp shot and ship's GPS was not accounted for during acquisition nor have the ASCII navigation files and trackline maps been corrected to reflect the offset.
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 to produce gained GIF images of the subbottom profiles included in this report. A representative chirp data processing sequence consisted of (1) stripping off navigation data for each shot and converting 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. For additional SU processing and script details, please refer to https://pubs.usgs.gov/ds/0972/software/su/readme.txt.
Source_Used_Citation_Abbreviation: SEG Y
Process_Date: 2015
Source_Produced_Citation_Abbreviation: 14i*.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: Shotpoint navigation, start of line, and 1,000-shot-interval location files were extracted using SU software and output as ASCII text files. These files were processed with PROJ.4.7.0 (http://trac.osgeo.org/proj/) to generate Universal Transverse Mercator (UTM) coordinates (World Geodetic System (WGS84), Zone 16, meters) from latitude and longitude coordinates. Text files for each seismic line were concatenated into comma-delimited text files (for use with Environmental Systems Research Institute (Esri) software); one containing unique shotpoint positions (14BIM05.txt), another containing the 1,000-shot-interval locations (s14BIM05.txt), and the last containing start of line locations (14BIM05_s); which can all be viewed within the nav (https://pubs.usgs.gov/ds/0972/nav) folder.
Source_Used_Citation_Abbreviation: 14i**.txt
Process_Date: 2013
Source_Produced_Citation_Abbreviation: 14BIM05.txt
Source_Produced_Citation_Abbreviation: s14BIM05.txt
Source_Produced_Citation_Abbreviation: 14BIM05_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:
All concatenated, comma-delimited text files were imported into ArcGIS and saved as either a point or polyline file in the Esri shapefile format. Trackline map creation: The trackline map was created using Esri ArcGIS 10.2 software. The processed navigation file, 14BIM05.txt, was imported into ArcMap 10.2 and processed using the ArcScript, Points to Lines, to create a line shapefile of the cruise tracklines (14bim05_trkln). The 1,000-shot-interval file, s14BIM05.txt, and the start of line file, 14BIM05_s.txt, were imported into ArcMap as point shapefiles and saved as 14bim05_shots and 14bim05_sol. Please refer to the shapefile metadata included in the ArcGIS map document in the Software section of this archive for additional details. All maps were exported to Adobe Illustrator v. 14 for further editing and later converted into JPEG format by Adobe Dreamweaver v. 10 Build 4117. The maps are unprojected (geographic coordinates, WGS84). The USGS is the originator of all layers used. Please see the ArcGIS readme file for detailed information about the GIS files used in this report.
Source_Used_Citation_Abbreviation: 14BIM05.txt
Source_Used_Citation_Abbreviation: s14BIM05.txt
Source_Used_Citation_Abbreviation: 14BIM05_s.txt
Process_Date: 2013
Source_Produced_Citation_Abbreviation: 14bim05_trkln.shp
Source_Produced_Citation_Abbreviation: 14bim05_shots.shp
Source_Produced_Citation_Abbreviation: 14bim05_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
Process_Step:
Process_Description:
Data Series preparation: In addition to the process steps described above, the following steps were taken to produce this Data Series report: Digital FACS logs were created by A. Forde, using the cruise logs and personal accounts of crew members and saved as PDF files, and an HTML-based format was used to present the various parts of this archive.
Process_Date: 2015
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:
Indirect_Spatial_Reference:
Horizontal X and Y locations (latitude and longitude and WGS84 Zone 16 UTM coordinates) for each shot are provided as ASCII text files, along with the date and time (Universal Coordinated Time (UTC)) the shot was recorded.
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0197881408
Longitude_Resolution: 0.0227546261
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: WGS84
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: 14BIM05.txt, s14BIM05.txt, and 14BIM05_s.txt
Entity_Type_Definition: Shotpoint navigation files
Entity_Type_Definition_Source: SEG Y headers (http://www.seg.org/publications/tech-stand).
Attribute:
Attribute_Label: FID*
Attribute_Definition: Internal feature number.
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: Coordinates defining the features.
Attribute:
Attribute_Label: UTMX
Attribute_Definition: UTM-X coordinate (Zone 16)
Attribute_Definition_Source: Universal Transverse Mercator Geographic Coordinate System
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 285098
Range_Domain_Maximum: 300170
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: UTMY
Attribute_Definition: UTM-Y coordinate (Zone 16)
Attribute_Definition_Source: Universal Transverse Mercator Geographic Coordinate System
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3251813
Range_Domain_Maximum: 3262686
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: yye##a, where 'yy' are the last two digits of the year in which the data were collected, 'i' is a 1-letter abbreviation for the equipment type (for example, i for 512i chirp), '##' is a 2-digit number representing a specific track, and 'a' is a letter representing a section of the line if recording was prematurely terminated or rerun 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: 20000
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: -89.214911
Range_Domain_Maximum: -89.060156
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: 29.378553
Range_Domain_Maximum: 29.477108
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: 2014
Range_Domain_Maximum: 2014
Attribute:
Attribute_Label: DOY:HR:MIN:SEC
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
Overview_Description:
Entity_and_Attribute_Overview:
Binary data file: Trace data are available as binary files in SEG Y format. These files have a .sgy extension and range in size from 3 to 110 MB. These data can be found by going to http://cmgds.marine.usgs.gov.
Entity_and_Attribute_Overview:
Graphic image file: Printable versions of the subbottom profiles are available as GIF images; links to these images can be found on the Profiles page of this report or by going to https://pubs.usgs.gov/ds/0972/profiles/printable/.
Entity_and_Attribute_Overview:
Navigation file: Navigation files are available as ASCII text files. Provided are raw (unprocessed) shotpoint navigation files (14i**.txt), processed shotpoint navigation (14BIM05.txt), processed 1,000-shot-interval location (s14BIM05.txt), and a start of line file (14BIM05_s.txt). Fields/Attributes [FID, Shape] marked above with an asterisk (*) were created by Esri ArcGIS and are used exclusively by the shapefiles created from the three aforementioned .txt files; these fields are not included in the original navigation files. All remaining attributes listed above, in the Entity_and_Attribute_Information section, that do not have an accompanying asterisk are found in 14BIM05.txt, s14BIM05.txt, and 14BIM05_s.txt. Raw and processed navigation data files can be found at https://pubs.usgs.gov/ds/0972/nav/.
Entity_and_Attribute_Overview:
GIS file: The GIS project used to create the trackline maps is provided as a .zip file composed of Esri map documents, shapefiles, and metadata.
Entity_and_Attribute_Detail_Citation: Information is derived from SEG Y headers.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Arnell 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:
This report is available online. The SEG Y files are downloadable from the Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).
Resource_Description: U.S. Geological Survey Data Series 972
Distribution_Liability:
This DVD 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 rev. 0
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: None
Transfer_Size: 3540
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD
Recording_Format: ISO 9660
Compatibility_Information: Unix, Linux, DOS, Macintosh
Digital_Form:
Digital_Transfer_Information:
Format_Name: map document, shapefile, metadata
Format_Information_Content:
The GIS project used to create the trackline maps is composed of map documents, shapefiles, and metadata. Map documents were created with Esri ArcGIS 10.2 software. The shapefiles provided 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).
File_Decompression_Technique: unzip
Transfer_Size: 133
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://pubs.usgs.gov/ds/0972/software/arc/arc.zip
Fees: None, if obtained online; otherwise, prices vary.
Ordering_Instructions:
Publications are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS, e-mail: infoservices@usgs.gov).
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/).
Metadata_Reference_Information:
Metadata_Date: 20150728
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Arnell 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

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