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Identification_Information:

  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey (USGS) , Coastal and Marine Geology Program (CMGP) 
      Publication_Date: 20140318
      Title:
        Data of field activity 85027 (F-1-85-GM) in Gulf Mexico from
        08/07/1985 to 09/03/1985
      Publication_Information:
        Publisher: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
        Publication_Place: Menlo Park, CA
      Online_Linkage: http://walrus.wr.usgs.gov/infobank/gos/f-1-85-gm.fmeta.xml
      Online_Linkage: http://walrus.wr.usgs.gov/infobank/f/f185gm/html/f-1-85-gm.meta.html
      Online_Linkage: http://quashnet.er.usgs.gov/data/1985/85027/index.html

  Description:
    Abstract:
      United States Geological Survey, Reston, Virginia. Chief
      Scientists: Bonnie McGregor, Guy Rothwell. Data
      (sidescansonar, airgun, 3dot5khz, 10khz, magnetics, loranc,
      transitsatellite, gps) of field activity 85027 (F-1-85-GM) in
      Gulf Mexico from 08/07/1985 to 09/03/1985,
      http://walrus.wr.usgs.gov/infobank/f/f185gm/html/f-1-85-gm.meta.html.

    Purpose:
      These data and information are intended for science
      researchers, students from elementary through
      college, policy makers, and general public.

    Supplemental_Information:

      Equipment Used -

      sidescansonar                 GLORIA long-range side-scan sonar

      airgun                        160 and 80 cu in single-channel seismic-reflection system

      3dot5khz                      3.5 khz bathymetry

      10khz                         10 khz bathymetry

      magnetics

      loranc                        Loran C

      transitsatellite              Satellite receiver

      gps                           Global Positioning System

      Notes -

      LEG 1:

        

      Leg 1 focused on the western half of the Gulf of Mexico, seaward of

      Texas and Louisiana, and abutting GLORIA coverage from a 1982 survey.  This

      portion of the Gulf is dominated by salt tectonics.  The area mapped with

      GLORIA during this leg was 45,000 sq nautical miles.

        

      Data Summary - Leg 1

        

      At sea a total of 27 days

        

      Mileage for each type of data collected:

        

      GLORIA sidescan		4430 nm		8195 km

        

      3.5 kHz			4594 nm		8504 km

        

      10 kHz			4594 nm		8504 km

        

      airgun			4430 nm		8195 km

        

      magnetometer		4080 nm		7548 km

        

      Comments - Leg 1:

        

      The weather during leg 1 was generally excellent except for two

      hurricanes.  Hurricane Danny resulted in a loss of 13 hours of operation

      on August 14, 1985, and Hurricane Elena delayed arrival in New Orleans one

      day, from September 2 to September 3, 1985.

        

      The impact that the warm surface water and strong thermocline

      present in the Gulf of Mexico in the summer would have on the range of the

      GLORIA system was not realized.  Although GLORIA was run at a 30 sec.

      repetition rate (45 km swath width) the maximum swath width actually obtained

      was 8 km in approximately 1000 m of water.  This required reducing the

      trackline spacing, adding additional tracklines, and thus limiting the effort

      in water depths shallower than 1000 m.

        

      Initially, much time was spent getting all equipment operational.

      The GLORIA system suffered from logging problems resulting in a loss of

      approximately 24 hours of data during the cruise.  The longest continuous

      down time period was 12 hours.  Dirt particles in the air being pulled across

      the recording heads by the air conditioning system appears to have been the

      major problem.  The airgun system was down a total of approximately 24 hours

      due to compressor, streamer, and airgun problems.  The longest continuous

      period of down time was 7 hours.  The magnetometer required 3 days to get

      operational initially, but this was partly a result of its lowest priority.

      A new computer system was installed for this cruise.  Most of the leg was

      required to get the system operating properly.  Navigation had to be plotted

      by hand for the duration of the cruise.  Summary data plots for the cruise,

      however, track line plots were completed with the computer system at the end

      of the cruise.

        

      The data in the western Gulf are very interesting geologically.  The

      Sigsbee Escarpment can be identified on the sonographs with piles of debris

      in places at its base.  A continuous channel can be traced from the shelf edge

      through the diapir province of the slope, forming a reentrant in the Sigsbee

      Escarpment, and then meandering seaward across the rise into the deep

      water of the Gulf.  The fan of the Rio Grande has a braided channel system,

      on which are features interpreted to be bedforms.  Similar bedforms are

      present seaward of the Sigsbee Escarpment suggesting that strong bottom

      currents are present in the region.

      Publications -

      Paskevich, Valerie F.; Wong, Florence L.; O'Malley, John J.; Stevenson,

      Andrew J.; Gutmacher, Christina E., 2010, GLORIA sidescan-sonar imagery

      for parts of the U.S. Exclusive Economic Zone and adjacent areas: U.S.

      Geological Survey Open-File Report 2010-1332,

      http://pubs.er.usgs.gov/publication/ofr20101332.

        

      Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar

      field data and navigation data collected in the Gulf of Mexico during

      R/V Farnella cruises in 1982 and 1985: U.S. Geological Survey Open-File

      Report 96-707,

      http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM.


      Similar information is available for thousands
      of other USGS/CMG-related Activities.

      If known, available are Activity-specific
      navigation, gravity, magnetics, bathymetry,
      seismic, and sampling data; track maps; and
      equipment information; as well as summary
      overviews, crew lists, and information
      about analog materials.

      If available, access to physical samples is
      described in the "WR CMG Sample Distribution
      Policy" at:
      http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html

      Primary access to the USGS/CMG Information
      Bank's digital data, analog data, and
      metadata is provided through...
      http://walrus.wr.usgs.gov/infobank/

      This page accomodates a variety of search
      approaches (e.g., by platform, by region,
      by scientist, by equipment type, etc.).

  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 19850807
        Ending_Date: 19850903

    Currentness_Reference: ground condition

  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed

  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -95.66830
      East_Bounding_Coordinate: -81.62170
      North_Bounding_Coordinate: 27.96980
      South_Bounding_Coordinate: 23.82450

  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: geoscientificinformation
      Theme_Keyword: oceans
    Theme:
      Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
      Theme_Keyword: EARTH SCIENCE > OCEANS
    Theme:
      Theme_Keyword_Thesaurus: USGS CMG InfoBank
      Theme_Keyword: Marine Geology

    Place:
      Place_Keyword_Thesaurus: USGS CMG InfoBank
      Place_Keyword: "Gulf Coast, US"
      Place_Keyword: Gulf Coast
      Place_Keyword: Gulf Coast, US
      Place_Keyword: Gulf Mexico
      Place_Keyword: Gulf of Mexico
      Place_Keyword: USA


  Access_Constraints:
    Physical materials are under controlled on-site access.

    If available, access to physical samples is described
    in the "WR CMG Sample Distribution Policy" at:
    http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html

  Use_Constraints:
    Please recognize the U.S. Geological Survey (USGS) as
    the source of this information.

    Physical materials are under controlled on-site access.

    Some USGS information accessed through this means
    may be preliminary in nature and presented without
    the approval of the Director of the USGS.  This
    information is provided with the understanding
    that it is not guaranteed to be correct or complete
    and conclusions drawn from such information are
    the responsibility of the user.

    This information is not intended for navigational
    purposes.

    Any use of trade, firm, or product names is for
    descriptive purposes only and does not imply
    endorsement by the U.S. Government.

  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
        Contact_Person: Clint Steele 

      Contact_Position: InfoBank Group Leader 

      Contact_Address:
        Address_Type: mailing and physical address
        Address: USGS, MailStop 999, 345 Middlefield Road
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025-3561
        Country: USA

      Contact_Voice_Telephone: (650) 329-5055
      Contact_Facsimile_Telephone: (650) 329-5190

      Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov 


  Browse_Graphic:
    Browse_Graphic_File_Name: http://walrus.wr.usgs.gov/infobank/f/f185gm/html/f-1-85-gm.nav.gif
    Browse_Graphic_File_Description: Trackline map of F-1-85-GM
    Browse_Graphic_File_Type: GIF

  Data_Set_Credit:
    Bonnie McGregor (Chief Scientist, USGS Miami);
    Dann Blackwood (Photographer, USGS Woods Hole);
    Bob Mattick (Geologist Data Curator, USGS Woods Hole);
    Bill Sweet (Geologist, MMS (Minerals Management Service, U.S.A.));
    Kim Benjamin (Engineer, WHOI (Woods Hole Oceanographic Institution, U.S.A.));
    Mike Somers (GLORIA Engineer, IOS (Institute of Oceanographic Sciences, U.K.));
    Guy Rothwell (Chief Scientist, IOS);
    Alan Gray (Airgun Tech, IOS);
    Quentin Huggett (Geologist, IOS);
    Ross Walker (GLORIA Engineer, IOS);
    Derek Bishop (GLORIA Engineer, IOS (Institute of Oceanographic Sciences, U.K.));
    Christopher Jackson (Shipboard Computing, RVS (Research Vessel Services, U.K.));
    E. Cooper (RVS);
    Roy Hadgraft (Captain, J. Marr and Sons)

  Native_Data_Set_Environment: Digital, ASCII
  Cross_Reference:
    Citation_Information:
      Originator: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
      Publication_Date: Unknown
      Title: USGS/CMG Information Bank 
      Publication_Information:
        Publisher: U.S. Geological Survey (USGS)  Coastal and Marine Geology (CMG) 
        Publication_Place: Menlo Park, CA
      Online_Linkage: http://walrus.wr.usgs.gov/infobank/
      Online_Linkage: http://quashnet.er.usgs.gov/data/1985/85027/index.html
      Other_Citation_Details:
        Paskevich, Valerie F.; Wong, Florence L.; O'Malley, John J.; Stevenson,
        Andrew J.; Gutmacher, Christina E., 2010, GLORIA sidescan-sonar imagery
        for parts of the U.S. Exclusive Economic Zone and adjacent areas: U.S.
        Geological Survey Open-File Report 2010-1332,
        http://pubs.er.usgs.gov/publication/ofr20101332.
          
        Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar
        field data and navigation data collected in the Gulf of Mexico during
        R/V Farnella cruises in 1982 and 1985: U.S. Geological Survey Open-File
        Report 96-707,
        http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM.



Data_Quality_Information:

  Attribute_Accuracy:
    Attribute_Accuracy_Report: Identified as best available version.

  Logical_Consistency_Report: Unspecified

  Completeness_Report:
    Start and end date/times of data
    >Navigation Data (f-1-85-gm.060 [GPS])
    >YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    >198508081910000    198508201230000
    >198508201306000    198508241436000
    >198508241500000    198508301514000
    >198508301554000    198509011548000
    >YYYYMMDDHHMMSST    YYYYMMDDHHMMSST

  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Unspecified

    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Unspecified

  Lineage:

    Process_Step:
      Process_Description:
        Navigation Data
        >/infobank/f/f185gm/nav/f-1-85-gm.060
        >time/lat/long style, multi-record, in caps, without tabs
        >temporal-spatial data
        >copied and reformatted from Navigation Data R/V Farnella 85, Leg 1 in:
        >Twichell, David C., and Paskevich, Valerie, 1996, GLORIA sidescan sonar field data
        >and navigation data collected in the Gulf of Mexico during R/V Farnella cruises
        >in 1982 and 1985: U.S. Geological Survey Open-File Report 96-707,
        >http://woodshole.er.usgs.gov/publications/of96-707/OPR96_707/INTRO.HTM.
        > - C Degnan, 3/18/2014
        >       1         2         3
        >3456789012345678901234567890123456
        >
      Process_Date: 20140318

      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
            Contact_Person: Clint Steele 

          Contact_Position: InfoBank Group Leader 

          Contact_Address:
            Address_Type: mailing and physical address
            Address: USGS, MailStop 999, 345 Middlefield Road
            City: Menlo Park
            State_or_Province: CA
            Postal_Code: 94025-3561
            Country: USA

          Contact_Voice_Telephone: (650) 329-5055
          Contact_Facsimile_Telephone: (650) 329-5190

          Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov 


Spatial_Data_Organization_Information:

  Indirect_Spatial_Reference: Gulf Mexico
  Direct_Spatial_Reference_Method: Point

  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point


Spatial_Reference_Information:

  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.00001
      Longitude_Resolution: 0.00001
      Geographic_Coordinate_Units: Decimal degrees

  Vertical_Coordinate_System_Definition:
    Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values


Entity_and_Attribute_Information:

  Overview_Description:
    Entity_and_Attribute_Overview: Navigation with Time Stamp 


Distribution_Information:

  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
        Contact_Person: Clint Steele 

      Contact_Position: InfoBank Group Leader 

      Contact_Address:
        Address_Type: mailing and physical address
        Address: USGS, MailStop 999, 345 Middlefield Road
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025-3561
        Country: USA

      Contact_Voice_Telephone: (650) 329-5055
      Contact_Facsimile_Telephone: (650) 329-5190

      Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov 

  Resource_Description: Downloadable Data 85027 (F-1-85-GM) data set 

  Distribution_Liability:
    Please recognize the U.S. Geological Survey (USGS) as
    the source of this information.

    Physical materials are under controlled on-site access.

    Some USGS information accessed through this means
    may be preliminary in nature and presented without
    the approval of the Director of the USGS.  This
    information is provided with the understanding
    that it is not guaranteed to be correct or complete
    and conclusions drawn from such information are
    the responsibility of the user.

    This information is not intended for navigational
    purposes.

    Any use of trade, firm, or product names is for
    descriptive purposes only and does not imply
    endorsement by the U.S. Government.

  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ASCII
        File_Decompression_Technique: No compression applied
        Transfer_Size: 1.0

      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://walrus.wr.usgs.gov/infobank/f/f185gm/html/f-1-85-gm.nav.html

    Fees: None


Metadata_Reference_Information:

  Metadata_Date: 20140318

  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) 
        Contact_Person: Clint Steele 

      Contact_Position: InfoBank Group Leader 

      Contact_Address:
        Address_Type: mailing and physical address
        Address: USGS, MailStop 999, 345 Middlefield Road
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025-3561
        Country: USA

      Contact_Voice_Telephone: (650) 329-5055
      Contact_Facsimile_Telephone: (650) 329-5190

      Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov 

  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata 

  Metadata_Standard_Version: FGDC-STD-001-1998 

  Metadata_Time_Convention: universal time
  Metadata_Access_Constraints: none
  Metadata_Use_Constraints: none



      
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Page Last Modified: Tue Mar 18 13:00:57 PDT 2014  (chd)