Other ID: 77-02; 77-5
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Rio de la Plata Canyon, Puerto Rico, United States, North America, North Atlantic;
Principal Investigator(s): James V. A. Trumbull
Affiliate Investigator(s): Orrin Pilkey
Data Type(s): Biological Field Study: Experiments, Seismics: Sub Bottom Profiler, Location-Elevation: Navigation
Scientific Purpose/Goals: Investigate submarine canyon off Rio de la Plata, north coast of Puerto Rico: coring, seismics, and bathymetry.
Start Date: 1977-02-14
End Date: 1977-02-16
Equipment Used: Corer - slow, 3.5 kHz, Raytheon radar
Information to be Derived: Morphology;
Summary of Activity and Data Gathered: Ewing piston cores: 12; 3.5 kHz: 40 km. Cores obtained from canyon flanks and axis on shelf and slope. Flanks mostly clay with pelagic organisms but many terrigenous sand beds throughout penetration of 20 feet. Semi-indurated probably Tertiary clay and bent pipe in axial attempts. Seismic quality poor but inter-canyon sediments clearly unconformable on apparently smooth surface near axial depth of canyon. 3.5 kHz good for selecting coring locations. Bathymetry and seismics to be compiled/interpreted in San Juan. Cores stored in San Juan. Core cuts to be analyzed at Duke.
Staff: James V. A. Trumbull