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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1979-003-FA

Other ID: none

Status: Completed

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

Funding Program(s):

Principal Investigator(s): David W. Folger

Affiliate Investigator(s):

Information Specialist(s):

Data Type(s): Seismics: Sparker, Seismics: Sub Bottom Profiler, Sampling: Geology, Location-Elevation: Navigation

Scientific Purpose/Goals: Obtain high-resolution data from eastern portion of St. Croix, in addition to obtaining some core data for ground truth on a suspected sand body. In the Saba Island area off St. Thomas - St. John, make current measurements, obtain surface samples, and core the reef masses to obtain samples for dating.


Start Port/Location:

End Port/Location:

Start Date: 1979-03-18

End Date: 1979-03-31

Equipment Used: Alpine Vibracorer, ORE 140 transceiver/1036 transducer sub-bottom profiler, Motorola Mini-Ranger III, Well drilling, Del Norte 26 sparker

Information to be Derived:

Summary of Activity and Data Gathered: Approximately 100 km of high-resolution data were acquired (mostly minisparker). The 1032 system lacked the power to penetrate the hard carbonate surface. The few centimeters of sand could not be resolved. 5 days of continuous current data were acquired, the last two under winter storm conditions. Vibracores: 4; 120 cm drill core: 1 (30 cm recovery); surface samples: 12.

Staff: David W. Folger, Charles W. Holmes, Ronald J. Miller, Neal Lillard

Affiliate Staff:

Notes: Original Center People field contained: Chuck Holmes; Dave Folger (3/18 - 3/24); Ronald Miller; Jack Kindinger; Neal Lillard.


eastern St. Croix, southern St. Thomas - St. John Platform, U.S. Virgin Islands, United States, Caribbean, North America, North Atlantic;

North: 18.45 South: 18.3 West: -65 East: -64.6


photo of Sarima

Black Coral



Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Del Norte 26 sparker --- Sparker
ORE 140 transceiver/1036 transducer sub-bottom profiler --- Sub Bottom Profiler
Alpine Vibracorer --- Geology
Well drilling --- Geology
Motorola Mini-Ranger III --- Navigation

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