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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1984-005-FA

Other ID: UCONN 84-1

Status: Completed

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

Funding Program(s):

Principal Investigator(s): Stephen Colman

Affiliate Investigator(s): Ralph S. Lewis - CT Geological and Natural History Survey

Information Specialist(s):

Data Type(s): Seismics: Boomer, Seismics: Air Gun / Water Gun, Seismics: Bubble Gun, Seismics: Sparker, Seismics: Sub Bottom Profiler, Sonar: Sidescan, Location-Elevation: Navigation

Scientific Purpose/Goals: (1) Define geology and shallow structure of western Long Island Sound; (2) determine geologic framework and Quaternary development of study area; (3) identify and map potential geologic hazards; and (4) simultaneously use and compare two types of hydrophone/amplifier/graphic recorder systems to determine which system is most suitable for this type of survey.


Start Port/Location: New Haven, CT

End Port/Location: New Haven, CT

Start Date: 1984-05-16

End Date: 1984-05-25

Equipment Used: Innerspace Technology 25-element hydrophone, EG&G 234, Edo Western Sidescan and 2.5 kHz sub-bottom system, Loran-C

Information to be Derived: Morphology;

Summary of Activity and Data Gathered: Calm seas and few emergency course alterations allowed for consistent, well documented high-res seismic reflection data. In addition, the excellent resolution and penetration of the Innerspace hydrophone system, except in areas where gas deposits obscured the acoustic signal, produced clear, well-defined records from which the geology of western Long Island Sound can be ascertained. Original cruise plans called for the implementation of EDO Western sidescan sonar system to obtain sea-floor imagery. Unfortunately, the system malfunctioned the first sea day and was discontinued. Uniboom: 634 km.

Staff: David Mason, David Nichols, Stephen Colman, Gerald Edwards

Affiliate Staff:
Ralph S. Lewis
Ch. Sci. (May 16-25); Bob Altamura
geologist (May 18); Margaret Thomas
geologist (May 19)

Notes: Original Center People field contained: Steve Colman, geologist (May 16-17); Gerald Edwards, geologist (May 21-25); Dave Nichols, ET (May 16-25); David Mason, mech. tech. (May 16-25).
Project = New England Coastal Geology, New England Coastal Geology


western Long Island Sound, Connecticut, United States, North America, North Atlantic;

North: 41.25 South: 40.85 West: -73.3 East: -72.8


photo of Uconn


Poppe, L.J., McMullen, K. Y., Williams, S. J., Crocker, J. M., and Doran, E. F., 2008, Estuarine sediment transport by gravity-driven movement of the nepheloid layer, Long Island Sound: Geo-Marine Letters, v. 28 no. 4, doi: 10.1007/s00367-008-0118-2.

Poppe, L.J., Paskevich, V.F., Lewis, R.S., and DiGiacomo-Cohen, M.L., 2002, Geological framework data from Long Island Sound, 1981-1990; a digital data release: U.S. Geological Survey Open-File Report 02-002, DVD-ROM, URL:


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
EG&G 234 --- Boomer
Innerspace Technology 25-element hydrophone --- Air Gun / Water Gun
Bubble Gun
1984-005-FA-SE-003 ( analog tape of seismic data)
1984-005-FA-SE-002 ( microfilm of )
1984-005-FA-SE-001-01 ( Scanned Profiles - 31 scanned record sections in TIFF format.)
Edo Western Sidescan and 2.5 kHz sub-bottom system --- Sub Bottom Profiler
Loran-C --- Navigation
1984-005-FA-NL-001-03 ( Navigation Logbook (pdf file) Navigation log including watchstander's notes for Uniboom and sidescan sonar systems, data acquisition, weather conditions, equipment configuration and performance, etc.)
1984-005-FA-LN-001 ( Navigation trackline plot for field activity 84005)
1984-005-FA-LN-002-01 ( Navigation data)

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