Summary Information for Field Activity 1984-005-FA

Area of Operations: western Long Island Sound, Connecticut, United States, North America, North Atlantic

Dates: May 16, 1984 to May 25, 1984

Chief scientist: Steve Colman

Ralph S. Lewis - CT Geological and Natural History Survey

Objectives: (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.

Type of Activity:

Information to be derived: Morphology;

Summary: 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.

Contact: Steve Colman (scolman@usgs.gov)

InfoBank: uses the identifier U-1-84-LI. Visit this site for more information.

Related Links:

- Download 84005.kml to view this field activity in Google Earth

Platform Info:

UCONN

Publications resulting from these data

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. (Also available at http://woodshole.er.usgs.gov/openfile/of02-002/)

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: p. 245-254. (Also available at http://dx.doi.org/10.1007/s00367-008-0118-2)

Data Types and Locations:

Navigation

Navigation data

Logs

Chief Scientist's report of ship movement, personnel, equipment and data acquisition notes, and trackmap

Inventory of Field Data (pdf file) Cruise Curator's field data inventory.

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.

Seismics

Scanned Profiles - 31 scanned record sections in TIFF format.