U.S. Geological Survey Open-File Report 94-152

Geologic Features of the Sea Bottom Around a Municipal Sludge Dumpsite near 39鑞, 73鱒, Offshore New Jersey and New York: U.S. Geological Survey Open-file Report 94-152

DATA AND METHODS

A bathymetric map made from data acquired aboard the RV Atlantis II in 1989 using a Sea Beam multibeam echos-sounding system was combined with a an image of part of the U.S. East Coast GLORIA mosaic (Robb, 1992; EEZ-SCAN 87 Scientific Staff, 1991).

Bathymetric contours. Sea-Beam soundings gridded to 125-m interval and contoured at sea aboard RV Atlantis II, during September, 1989. Depressions are shaded.

In addition, visual observations, photographs, video recordings, and sediment samples were made during DSRV Alvin dives and a Jason transect (RV Atlantis II, 1989, RV Betty Chouest, 1991) (Jason is a deep-sea remotely operated vehicle). Higher resolution sidescan-sonar observations were made near the central part of the dumpsite area (RV Betty Chouest, 1991, and RV Oceanus 251, 1992), using a deep-towed 120 kHz system.

Navigation for the data-acquisition cruises relied primarily on Loran-C supported by fixes from the satellite-based Global Positioning System (GPS). The fix-accuracy was closer than 100 m and allowed the data sets to be overlaid precisely on one another.

To continue, click on:: Description of the sea floor...; Discussion...; Conclusions...; References Cited...; Illustrations Summary
Or, to review, click on:: Abstract...; Introduction...; Data and Methods...; (Bathymetric map); (GLORIA mosaic)

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U.S. Department of the Interior, U.S. Geological Survey
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