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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1977-037-FA

Other ID: 77-09

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): Kurt Grove - PR-DNR

Information Specialist(s):

Data Type(s): Sonar: Single Beam, Sampling: Biology, Sampling: Chemistry, Sampling: Geology, Environmental Data: Tide

Scientific Purpose/Goals: Investigate sand waves on pipeline route, Escollo de Arenas, northwest of Isla de Vieques, Puerto Rico. Map and measure sand waves; sample; set stakes to detect motion/sediment transport; photograph and observe sand waves by SCUBA; measure tide heights; and sample water on different tides to measure suspended sediment.


Start Port/Location: Isla de Vieques, Puerto Rico

End Port/Location: Isla de Vieques, Puerto Rico

Start Date: 1977-11-07

End Date: 1977-11-16

Equipment Used: SCUBA, Echosounder, Water sampler, Tide gauge

Information to be Derived: Grain size analysis; Suspended sediment concentrations;

Summary of Activity and Data Gathered: Profiled, described and sampled shifting sand shoal, particularly 4 sand waves in central part, on pipeline route. Determined coarse sand is in oscillatory motion on each semi-diurnal tidal current; secondary 2-m waves are in motion. Sampled water on excurrent and incurrent tides for suspended sediment. Recorded rise and fall of tides. Ship days: 5; Man days: 25.

Staff: James V. A. Trumbull

Affiliate Staff:
Gary Prisby - Woods Hole; Puerto Rico Department of Natural Resources (PR-DNR): Kurt Grove - co-Ch. Sci.
Jose Muniz
Nelson Espinell

Notes: Platform is a 19-foot center-console outboard, trailered/ferried to Vieques; crew lived ashore at Naval Base. Original Center People field contained: James Trumbull - co-Ch. Sci.; Gary Prisby - Woods Hole.
Project = Puerto Rico project, Puerto Rico project


Isla de Vieques, Puerto Rico, United States, Caribbean Sea, North America, Noth Atlantic;

North: 18.25 South: 18.1 West: -65.75 East: -65.5




Grove, K.A., and Trumbull, James V. A., 1978, Surficial geologic maps and data on three potential offshore sand sources on the insular shelf of Puerto Rico: U.S. Geological Survey Miscellaneous Field Studies Map MF-1017, 1 sheet.


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Echosounder --- Single Beam
SCUBA --- Biology
Water sampler --- Chemistry
Tide gauge --- Tide

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