Other ID: 87-1, Leg 1; F1-87-EC
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Principal Investigator(s): David Twichell, Peter Popenoe
Affiliate Investigator(s): John B. Wilson - IOS, Godalming, UK
Information Specialist(s): Sarah Griscom
Data Type(s): Sonar: Sidescan, Seismics: Air Gun / Water Gun, Seismics: Boomer, Seismics: Bubble Gun, Seismics: Sparker, Seismics: Sub Bottom Profiler, Electro-Magnetic: Magnetics, Sonar: Single Beam, Location-Elevation: Navigation
Scientific Purpose/Goals: This cruise was the first leg of the joint USGS/IOS GLORIA Survey of the East Coast Atlantic Margin Exclusive Economic Zone (EEZ). The cruise covered a portion of the EEZ that included the northern Blake Plateau and the continental slope and rise off Georgia, South Carolina, and North Carolina, from the 400 isobath to the 200 mile EEZ boundary. The British Institute of Oceanographic Sciences' (IOS) long-range sidescan sonar system (GLORIA) was contracted by the USGS to produce a reconnaissance-type map of the sea floor within the U.S. EEZ of the conterminous United States, Hawaii and Puerto Rico. The survey is being done to provide a basic understanding of the EEZ, including resource potential and geologic hazards.
Start Port/Location: Jacksonville, FL
End Port/Location: Norfolk, VA
Start Date: 1987-02-02
End Date: 1987-02-27
Equipment Used: 3.5 kHz, Air gun, Single channel hydrophone, 10 kHz Bathymetry, Racal/Decca Hyperfix, Northstar 6000 LORAN-C, Magnavox satellite positioning system, GLORIA sidescan, ABC navigation system, Geometrics G-856 magnetometer
Information to be Derived: Sea floor map; Morphology;
Summary of Activity and Data Gathered: GLORIA sidescan sonar: 6371 km (3440 nautical miles); Airgun: 6371 km (3440 nm); 3.5 kHz: 7408 km (4000 nm); 10 kHz: 6482 km (3500 nm); Magnetics: 5556 km (3000 nm).
Staff: David Twichell, Peter Popenoe, Sarah Griscom
Northern Blake Plateau, Blake Outer Ridge, Cape Hatteras, outer continental slope and rise, Georgia, South Carolina, North Carolina, United States EEZ, North America, North Atlantic;
Chaytor, J.D., Twichell, D.C., ten Brink, U.S., Buczkowski, B.J. and Andrews, B.D., 2007, Revisiting submarine mass movements along the U.S. Atlantic continental margin; implications for tsunami hazards, in V. Lykousis, D. Sakellariou, and J. Locat, eds., Submarine mass movements and their consequences: Springer, Netherlands, .
Chaytor, J.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, doi: 10.1016/j.margeo.2008.08.007.
Geist, E.L., Lynett, Patrick J., and Chaytor, Jason D., 2009, Hydrodynamic modeling of tsunamis from the Currituck landslide: Marine Geology, v. 264 no. 1-2, doi: 10.1016/j.margeo.2008.09.005.
Lubinski, D., Hughes-Clarke, John, Dillon, William, O'Leary, Dennis, Popenoe, Peter, Robb, James, and Schmuck, Eric, 1990, Magnetic and bathymetric data from R/V FARNELLA Cruises FRNL87-1, 87-2, 87-3, 87-4, and 87-5 in the U.S. Atlantic Margin EEZ, southern Blake Escarpment, and Nova Scotia continental rise: 11 URL: http://pubs.er.usgs.gov/publication/ofr90254, download PDF.
Popenoe, P., and Manheim, F.T., 2001, Origin and history of the Charleston Bump--geological formations, currents, bottom conditions, and their relationship to Wreckfish habitats on the Blake Plateau, in Sedberry, G.R., ed., Island in the Stream--Oceanography and Fisheries of the Charleston Bump: American Fisheries Society Symposium, v. 25.
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, doi: 10.1016/j.epsl.2009.07.031.
Twichell, D.C., Paskevich, V., Delorey, C.,, 1998, GLORIA sidescan-sonar field data and navigation data collected off Puerto Rico in 1985 and the eastern United States in 1987: URL: http://pubs.usgs.gov/of/of98-619/.
Twichell, D.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, doi: 10.1016/j.margeo.2009.01.009.