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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1993-026-FA

Other ID: JD 93-1

Status: Completed

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

Funding Program(s):

Principal Investigator(s): Lawrence Poppe, David Twichell

Affiliate Investigator(s): Ralph Lewis - CGS; Roman Zajac - U. New Haven

Information Specialist(s):

Data Type(s): Sonar: Sidescan, Seismics: Sub Bottom Profiler, Location-Elevation: Navigation

Scientific Purpose/Goals: Sidescan survey to determine textural distribution of surficial sediments and relate to active sedimentary processes; evaluate habitats and relate to benthic community structure. Cruise replaced cancelled ASTERIAS cruise originally scheduled for September 1993.


Start Port/Location: Old Lyme, CT

End Port/Location: Old Lyme, CT

Start Date: 1993-11-05

End Date: 1993-11-21

Equipment Used: 3.5 kHz, DGPS, Klein 595 100/500kHz sidescan sonar, Megapulse Accufix 500 LORAN-C, Q-MIPS sidescan sonar system

Information to be Derived: Habitat maps; Sea floor map;

Summary of Activity and Data Gathered: Milford (Housatonic) and Norwalk sidescan surveys were completed. Hammonasset was postponed due to stiff, sustained southwest wind and shallow bathymetry introducing unacceptable levels of surface noise. Sidescan sonar: 450 km.

Staff: VeeAnn Atnipp Cross, David Nichols, Lawrence Poppe, David Twichell

Affiliate Staff:
Ralph Lewis
Mary Cohen - CGS; Roman Zajac
2 students - U. New Haven; Suzanne O'Connell - Wesleyan College; Peter Auster - U. Conn.

Project = U. New Haven; Connecticut Co-operative, U. New Haven; Connecticut Co-operative


western and central Long Island Sound, Old Lyme to Milford, offshore Housatonic River mouth, offshore Norwalk River mouth, offshore Connecticut River mouth, Connecticut, United States, North America, North Atlantic;

North: 41.15 South: 40.95 West: -73.35 East: -73


photo of Dempsey


Poppe, L.J., and Polloni, Chris, eds., 1998, Long Island Sound environmental studies: U.S. Geological Survey Open-File Report 98-502, CD-ROM, URL:


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Klein 595 100/500kHz sidescan sonar --- Sidescan
1993-026-FA-SO-001-01 ( Sonar data)
Q-MIPS sidescan sonar system --- Sidescan
3.5 kHz --- Sub Bottom Profiler
1993-026-FA-SE-001 ( microfilm of 12?:1 REDUCTION)
DGPS --- Navigation
1993-026-FA-LN-001 ( Navigation trackline plot for field activity 93026)
Megapulse Accufix 500 LORAN-C --- Navigation

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