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Summary Information for Field Activity 1978-026-FA

Area of Operations: North Atlantic outer continental shelf and slope, Georges Bank, United States, North America, North Atlantic

Dates: September 08, 1978 to September 27, 1978

Chief scientist: John Aaron

Objectives: Determine location and frequency of mass sediment movement and other geological hazards on the North Atlantic Continental Slope (Georges Bank area) using high-resolution geophysical methods.

Type of Activity: Seismic profiling;

Information to be derived: Sea floor map; Morphology;

Summary: Overall data quality is excellent, with good resolution and penetration. Some areas of rough topography obscured the underlying structure. Records show slumping and other mass sediment movement occurred at several places on the continental slope adjacent to Georges Bank. Slumping occurs in scales that range from small to large and in styles that range from simple downslope creep to major dislocation. Most slump bodies are found near the base of slope with marked erosional truncations above. Records from the edge of the continental shelf show numerous buried channels of varying size and configuration. Inside the 60 m isobath extensive fields of large sand waves are present. 3.5 kHz: 218 km; Minisparker: 2669 km; Airgun: 2142 km.

Contact: John Aaron ()

InfoBank: uses the identifier I-72-78-GK. Visit this site for more information.

Related Links:

Click to get Google Software - Download 78026.kml to view this field activity in Google Earth

Platform Info:
ISELIN, COLUMBUS

Publications resulting from these data

Chaytor, Jason D., ten Brink, Uri S., Solow, Andrew R., and Andrews, Brian D.,2009, Size distribution of submarine landslides along the U.S. Atlantic margin: Marine Geology, v. 264, no. 1-2: p. 16-27. (Also available at http://dx.doi.org/10.1016/j.margeo.2008.08.007)

Twichell, David C., Chaytor, Jason D., ten Brink, Uri S., and Buczkowski, Brian,2009, Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin: Marine Geology, v. 264, no. 1-2: p. 4-15. (Also available at http://dx.doi.org/10.1016/j.margeo.2009.01.009)

ten Brink, U.S., Barkan, R., Andrews, B.D., and Chaytor, J.D.,2009, Size distributions and failure initiation of submarine and subaerial landslides: Earth and Planetary Science Letters, v. 287, no. 1-2: p. 31-42. (Also available at http://dx.doi.org/10.1016/j.epsl.2009.07.031)

Geist, Eric L., Lynett, Patrick J., and Chaytor, Jason D.,2009, Hydrodynamic modeling of tsunamis from the Currituck landslide: Marine Geology, v. 264, no. 1-2: p. 41-52. (Also available at http://dx.doi.org/10.1016/j.margeo.2008.09.005)

Bailey, Norman G., and Aaron, John M.,1982, High-resolution seismic-reflection profiles from the R/V COLUMBUS ISELIN, Cruise CI 7-78-2, over the continental shelf and slope in the Georges Bank area: U.S. Geological Survey Open-File Report 82-607, 2 p.. (Available as a PDF version)

Chaytor, J.D, Twichell, D.C., and ten Brink, U. S.,2012, A reevaluation of the Munson-Nygren-Retriever Submarine Landslide Complex, Georges Bank Lower Slope, Western North Atlantic: Submarine Mass Movements and their Consequences Book. (Also available at http://dx.doi.org/DOI 10.1007/978-94-007-2162-3_12,)


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