Image:Usgs-of99-570 mud volcano.png

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Two seismic-reflection scans of a fault zone in the Gulf of Mexico.

• A. Chirp seismic-reflection
• B. Water gun seismic-reflection.

Chirp seismic-reflection show a likely mud volcano adjacent to the fault zone where near-surface seismic-reflection amplitudes are high and the seafloor is disrupted.

Water gun data illustrate that the high-amplitude reflections extend downward in two zones, one that projects steeply (i.e., the master fault with likely gas/fluid) and another that projects laterally along apparent stratigraphy (i.e., a potential gas/fluid charged stratal unit). The fault zone has high backscatter at the sea floor, and is an area of likely upward migrating gases, fluids, and mobilized sediment, with contributions from the two subsurface high-amplitude zones.

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This image is a work of a United States Geological Survey employee, taken or made during the course of the person's official duties. As a work of the United States Government, the image is in the public domain. For more information, see the USGS copyright policy. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

http://geopubs.wr.usgs.gov/open-file/of99-570/ USGS Open-File Report 99-570 Online Version 1.0 A seismic-reflection investigation of gas hydrates and sea-floor features of the upper continental slope of the Garden Banks and Green Canyon regions, northern Gulf of Mexico: Report for cruise G1-99-GM (99002) By Alan Cooper, David Twichell, and Patrick Hart

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