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Summary Information for Field Activity 1979-028-FA

Area of Operations: Santaren Channel, Nicholas Channel, Cay Sal Bank, Bahamas, Straits of Florida, North America, North Atlantic

Dates: September 11, 1979 to September 16, 1979

Chief scientist: Mahlon Ball
Dick Sylwester

   Wayne Bock - Rosentiel School of Marine and Atmospheric Sciences, U. Miami

Objectives: Leg VII was planned to obtain gravity, magnetic and seismic reflection data over the Destin Anticline in the northern part of the MAFLA or western Florida Shelf region. These data would have increased our ability to assess the hydrocarbon potential of this huge, partially tested structure. Unfortunately, Hurricane David forced delay in departure and Hurricane Frederick stalled over the work area during scheduled cruise time. We availed ourselves of the University of Miami's entree into the interesting marine geologic problems in Florida-Bahamas waters to obtain geophysical data in Florida Straits, Santaren and Nicholas Channels, north of Cuba in the vicinity of Cay Sal, Bahamas.

Type of Activity: Seismic profiling;

Information to be derived: Morphology;

Summary: Our measurements recorded 2 anticlinal structures with dip reversals spanning several kilometers. These structures are large enough to constitute possible hydrocarbons exploration targets and occur in water depths less than 500 m, which is within currently drillable depths. Gravity data: 550 km; Magnetic data: 400 km; Seismic reflection data: 7 lines, 550 km.

Contact: Mahlon Ball ()
Dick Sylwester ()

InfoBank: uses the identifier G-7-79-SE. Visit this site for more information.

Related Links:

Click to get Google Software - Download 79028.kml to view this field activity in Google Earth

Platform Info:

Publications resulting from these data

Ball, Mahlon M., ed.,1983, Multichannel seismic measurements on the northern edge of the Bahaman-Cuban collision zone: U.S. Geological Survey Open-File Report 83-23, 70 p.. (Available as a PDF version). (Also available at

Ball, Mahlon M., Bowles, Robert L., Coward, Elizabeth L., and Dodd, James E.,1984, Multichannel seismic-reflection profiles collected aboard R/V GILLISS, Cruise GS7903, Leg 7, in Santaren and Nicholas Channels, near Cay Sal, southwestern Bahamas: U.S. Geological Survey Open-File Report 84-346, 3 p.. (Available as a PDF version). (Also available at

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Script last modified Wednesday, 17th December, 2014 @ 10:53am