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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1975-013-FA

Other ID: Party 77

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): Louis E. Garrison

Affiliate Investigator(s): Western Geophysical Company of America

Information Specialist(s):

Data Type(s): Location-Elevation: Navigation, Seismics: Sparker, Seismics: Sub Bottom Profiler

Scientific Purpose/Goals: Contractor Western Geophysical Company of America will conduct a high-resolution geophysical survey on the upper continental slope in the Gulf of Mexico, north of latitude 26 N, in water depths between 100 m and 1,000 m with seismic lines spaced from 7.5 to 18.5 km apart in a reconnaissance grid pattern.


Start Port/Location: Port Mansfield, TX

End Port/Location:

Start Date: 1975-07-28

End Date: 1975-12-20

Equipment Used: 3.5 kHz, Sparker , Single channel hydrophone, Loran-C

Information to be Derived:

Summary of Activity and Data Gathered: The released data consist of single-channel geophysical records from a 3.5 kHz sub-bottom profiler and a 1,000 joule sparker operated simultaneously throughout 18,074 km of ship's track: Lines 1A, 2 thru 214, 20A, 22A, 26A, 30A, and 69A. Data quality for all records at all water depths was good to excellent. Other data collected includes bathymetry and magnetics.


Affiliate Staff:
Survey contracted to Western Geophysical Company of America.

Notes: Navigation was by Offshore Navigation, Inc.


upper continental slope, Texas to Florida, Gulf of Mexico, United States, North America, North Atlantic;

North: 31.5 South: 25.75 West: -96.25 East: -84.5


Western Beacon



Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
3.5 kHz --- Sub Bottom Profiler
Sparker --- Sparker
Loran-C --- Navigation
Single channel hydrophone --- Air Gun / Water Gun
Bubble Gun
Sub Bottom Profiler
1975-013-FA-SE-001 ( microfilm of )

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