USGS - science for a changing world

USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1977-005-FA

View new CMGDS report form

Other ID: 77-02; 77-5

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): James V. A. Trumbull

Affiliate Investigator(s): Orrin Pilkey

Information Specialist(s):

Data Type(s): Biological Field Study: Experiments (biological), Seismics: Sub Bottom Profiler, Location-Elevation: Navigation, Sampling: Geology

Scientific Purpose/Goals: Investigate submarine canyon off Rio de la Plata, north coast of Puerto Rico: coring, seismics, and bathymetry.

Vehicle(s):

Start Port/Location:

End Port/Location:

Start Date: 1977-02-14

End Date: 1977-02-16

Equipment Used: 3.5 kHz, Raytheon radar, Piston corer

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

Affiliate Staff:
Orrin Pilkey - USGS and Duke Univ.; Students from Duke and University of North Carolina

Notes: Project = Puerto Rico Project, Puerto Rico Project
Information from foghorn: Piston coring;

Location:

Rio de la Plata Canyon, Puerto Rico, United States, North America, North Atlantic;

Boundaries
North: 18.65 South: 18.45 West: -66.35 East: -66.2

Platform(s):

photo of Eastward
Eastward

Publications

Portals/Viewers

Documents associated with this activity

Title Survey Equipment Description
Cruise report (document not focused on specific equipment) Brief cruise report including personnel, equipment, and comments on the results of the cruise. Combined with a tabulation of cruise data for fiscal year 1977 as part of the Puerto Rico Marine Geology Co-Op. Includes information for several field activities and a location map.

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
3.5 kHz --- Sub Bottom Profiler
Raytheon radar --- Navigation
Piston corer --- Geology

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Questions or Comments? Contact CMGDS Team
https://cmgds.marine.usgs.gov