USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1994-023-FA

Other ID: 94-18

Status: Completed

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

Funding Program(s):

Principal Investigator(s): David Twichell

Affiliate Investigator(s): Neal W. Driscoll - Lamont-Doherty Earth Observatory

Information Specialist(s):

Data Type(s): Sampling: Biology, Sampling: Geology, Imagery: Photo, Location-Elevation: Navigation, Sonar: Sidescan, Seismics: Sub Bottom Profiler, Sonar: Single Beam

Scientific Purpose/Goals: Re-survey a sidescan sonar survey from 1991 to document changes inflicted by Hurricane Bob and 2 major winter storms; build a sonar mosaic; obtain camera tows, box cores and grab samples.


Start Date: 1994-07-29

Start Port/Location: Block Island, RI

End Date: 1994-08-08

End Port/Location: Block Island, RI

Equipment Used: Box corer, Camera- deep sea, DGPS, Klein 531 sidescan, Q-MIPS sidescan sonar system, ORE 140 transceiver/1036 transducer sub-bottom profiler, ODOM 200 kHz depth recorder, Grab sampler - Van Veen

Information to be Derived: Sea floor map;

Summary of Activity and Data Gathered: Sidescan sonar: 124 km sq; 3.5 kHz sub-bottom: 884 km; Digital bathymetry: 884 km (Contact USGS); Camera tows: 12; 35 mm slides; Box cores: 23; Van Veen grabs: 211.

Staff: Barry Irwin, David Nichols, David Twichell, Eric A. Schmuck

Affiliate Staff:
Elizabeth Elliot - Wesleyan; Parker Hackett - U. VT; Barbara Hecker - Hecker Environmental Consultants; John Ladd - Hudson Highlands Museum; Earl Young - WHOI



Block Island Sound, Rhode Island, United States, North America, North Atlantic;

North: 41.3 South: 41.1 West: -71.95 East: -71.65


photo of Cape Henlopen
Cape Henlopen



Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Box corer --- Biology
Camera- deep sea --- Photo
DGPS --- Navigation
1994-023-FA-LN-001 ( Navigation trackline plot for field activity 94023)
Klein 531 sidescan --- Sidescan
1994-023-FA-SO-001 ( Digital tape(s) of SSS/3.5K L1-9, SSS/3.5K L10-23, SSS/3.5K L23-37, SSS/3.5K L38-51, SSS/3.5K L52-56, SSS/3.5K L57-58, )
Q-MIPS sidescan sonar system --- Sidescan
ORE 140 transceiver/1036 transducer sub-bottom profiler --- Sub Bottom Profiler
ODOM 200 kHz depth recorder --- Single Beam
Grab sampler - Van Veen --- Geology