USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1995-023-FA

Other ID: CH 17-95 Leg 1

Status: Completed

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

Funding Program(s):

Principal Investigator(s): William Dillon

Affiliate Investigator(s): Joe Gettrust - NRL-Stennis Space Center

Information Specialist(s):

Data Type(s): Imagery: Photo, Imagery: Video, Location-Elevation: Navigation, Sampling: Geology, Seismics: Air Gun / Water Gun, Sonar: Sidescan

Scientific Purpose/Goals: Sidescan sonar and seismic imaging of Blake Ridge collapse structure.


Start Date: 1995-10-11

Start Port/Location: Beaufort, NC

End Date: 1995-10-19

End Port/Location: Beaufort, NC

Equipment Used: Air gun, SIS-7000 sidescan, Sidescan sonar, DGPS, ARGO, Single channel hydrophone

Information to be Derived:

Summary of Activity and Data Gathered:

Staff: William Danforth, Rebecca Drury, Barry Irwin, Thomas O'Brien

Affiliate Staff:
Joe Gettrust - NRL; Mary Rowe - NRL; Larry Kooker - tech. - USGS-Menlo; Fred Hegg - tech. - Datasonics

Notes: Original Center People field contained: Bill Danforth - Ch. Sci.; Tom O'Brien - tech., Rebecca Drury - data curator, Barry Irwin - nav. tech., Greg Miller - tech.
Project = Gas Hydrate, Gas Hydrate


Blake Ridge, Blake Spur, South Carolina, United States, North America, North Atlantic;

North: 32.5 South: 31.5 West: -76 East: -75


photo of Cape Hatteras
Cape Hatteras


Anton, C., Dillon, W.P., and Lee, M., 1999, Anomalous, nearly horizontal, seismic reflection at the Blake Ridge--Evidence for a gas trap crosses the base of gas hydrate stability [abs.]: Eos, Transactions, American Geophysical Union, Spring Meeting, v. 80 no. 17-supplement, URL:|537|3089|T51A-08%20%20Anomalous%2c%20Nearly%20Horizontal%2c%20Seismic%20Reflection%20at%20the%20Blake%20Ridge:%20Evidence%20for%20a%20Gas%20%20Trap%20that%20C%20*%20Anton%2c%20C%20H%20Dillon%2c%20W%20P%20Lee%2c|TEXT|localhost:0|%2fdata%2fepubs%2fwais%2findexes%2fsm99%2fsm99|5522885%205525974%20%2fdata2%2fepubs%2fwais%2fdata%2fsm99%2fsm99.txt.

Taylor, M.H., Dillon, William P., Anton, Christopher H., and Danforth, William, 1999, Seismic-reflection surveys of the Blake Ridge, R/V CAPE HATTERAS 1992 and 1995; data acquisition, navigation and processing: URL:

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Air gun --- Air Gun / Water Gun
SIS-7000 sidescan --- Sidescan
1995-023-FA-SO-002 ( CD ROM disk of L7,8,9,10,11 BLAKE RIDGE, )
1995-023-FA-NL-002 ( CD ROM disk of L7,8,9,10,11 BLAKE RIDGE, )
Sidescan sonar --- Sidescan
DGPS --- Navigation
Nav data ( )
1995-023-FA-LN-001-02 ( Processed navigation)
1995-023-FA-LN-001-01 ( Raw navigation)
ARGO --- Photo
Single channel hydrophone --- Air Gun / Water Gun
Bubble Gun
Sub Bottom Profiler
Chirp seismic data ( )
1995-023-FA-SE-001 ( Digital tape(s) of SSS-SBTM L7-9, SSS-SBTM L10-11, SSS-SBTM L8, )
1995-023-FA-SE-001-01 ( SEGY seismic data)