Other ID: UGEO Leg 3; CORPUS 17/18
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: eastern Greater Antilles, northeast Caribbean Sea, North America, North Atlantic;
Principal Investigator(s): Louis E. Garrison
Data Type(s): Electro-Magnetic: Gravity, Electro-Magnetic: Magnetics, Location-Elevation: Navigation, Sampling: Biology, Sampling: Geology, Seismics: Sparker, Seismics: Sub Bottom Profiler
Scientific Purpose/Goals: Scientific objectives of this cruise leg were: (1) to investigate the zone of juncture between the south flank of the Antillean ridge and the north edge of the Venezuelan Basin along the depressed Muertos Trough; (2) to examine structural deformation in the Anegada Trough where the Greater Antilles are joined by the Lesser Antilles and Aves Swell; and (3) to study the northeastern sector of the Puetro Rico Trench where predicted relative plate motion should be transitional between westward underthrusting of the Lesser Antilles and east-west strike-slip motion north of the Greater Antilles.
Start Date: 1971-07-15
Start Port/Location: San Juan, Puerto Rico
End Date: 1971-08-04
End Port/Location: St. Thomas, U.S. Virgin Islands
Equipment Used: Dredge, Sparker system, ITT 4007 satellite navigation, Magnetometer (wh), Gravity meter (wh), Decca radar system, 3.5 kHz, Single channel hydrophone
Information to be Derived:
Summary of Activity and Data Gathered: Sub-bottom acoustic profiles were obtained over about 5,840 km of track line in the project area. One dredging station was occupied and three sonobuoy refraction profiles made. Total geophysical track miles: 3,028 (5,840 km); Time Log: #17a; Seismic Log: #17b; Gravity Log: #17c; Bathymetry Log: #17d; and Daily Log: #17e.
Staff: Louis E. Garrison, Ray G., Jr. Martin, James V. A. Trumbull
Notes: Original Center People field contained: Louis Garrison - Chief Scientist, James Trumbull, Mike Marlow, Ray Martin, Allen Cooper, Robert Immel, Bob Patrick, Martin Hijmans, Trevor Hill.
Garrison, L.E., 1972, Acoustic reflection profiles, Eastern Greater Antilles, International Decade of Ocean Exploration, Leg 3, 1971 cruise, UNITEDGEO I: USGS-GD-72-004, PB-207-596, 19 p., download PDF.