USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1977-033-FA

Other ID: CORPUS 52/57

Status: Completed

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

Funding Program(s):

Principal Investigator(s): Henry Berryhill, Charles W. Holmes

Affiliate Investigator(s):

Information Specialist(s):

Data Type(s): Seismics: Sparker, Location-Elevation: Navigation

Scientific Purpose/Goals: Obtain geologic information in order to map and define sand deposits in the territorial waters of the U.S. Virgin Islands.


Start Date: 1977-09-13

Start Port/Location:

End Date: 1977-10-01

End Port/Location:

Equipment Used: Del Norte 26 sparker, Motorola Mini-Ranger III

Information to be Derived: Morphology;

Summary of Activity and Data Gathered: The records obtained were good to excellent. The upper 10 feet of the sediment column is blocked by the arrival of the bubble pulse. The surface of the platform is sand and carbonate rock which produces multiple reflections. Because of water depth, at least 100 ms of good record were obtained. Minisparker: 1270 km; Seismic Lines: 1A, 1B, 3-9, 11, 13-23, 24A, 25-35, 37-64, 83-100, 102, 102A, 110-123, and CB; Time Log: #57.

Staff: Kenneth E. Parolski

Affiliate Staff:
USGS-Corpus Christi: Chuck Holmes - Proj. Ch. 9/13-21/77; Henry Berryhill
Jr. - Proj. Ch. 9/22-24/77; Ray G. Martin - Proj. Ch. 9/26/77 - 10/1/77; Neal Lillard
Timothy Martin
Ronald Miller



St. Thomas, St. John, Virgin Island Platform, U.S. Virgin Islands, Caribbean Sea, United States, North America, North Atlantic;

North: 18.4 South: 18.15 West: -65.1 East: -64.6





Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Del Norte 26 sparker --- Sparker
1977-033-FA-NL-001-02 ( Sand Resources Study - Phase I Report by Charles W. Holmes, Project Chief, describing geology of region derived from data collected on this cruise, with description of two cruises planned for following year. )
Motorola Mini-Ranger III --- Navigation
1977-033-FA-LN-001 ( Navigation trackline plot for field activity 77033)