Seismic-reflection data from R/V FARNELLA cruises FRNL82-7, FRNL85-1, FRNL85-2, and FRNL85-3A in the U.S. Gulf of Mexico EEZ

During the winter of 1982 and the summer and early fall of 1985, the U.S. Geological Survey (USGS) in cooperation with the Institute of Oceanographic Sciences of the United Kingdom collected approximately 30,508 line kilometers of seismic-reflection data in the U.S. Gulf of Mexico Exclusive Economic Zone (EEZ) as part of a USGS program to map the EEZ. In water depths exceeding 3,000 m, survey line spacing was about 25 km and gradually decreased to about 5 km in 250 m water depths. No areas were surveyed with depths shallower than 250 m. Orientation of the tracklines was in general parallel to the trend of the bathymetric contours (Figs. 1, 2, 3, and 4).