Other ID: AST 82-3
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Principal Investigator(s): Sally Needell
Affiliate Investigator(s): Ralph Lewis - Geologist, Connecticut Department of Environmental Protection
Data Type(s): Location-Elevation: Navigation, Seismics: Boomer, Sonar: Sidescan
Scientific Purpose/Goals: (1) Define the geology and shallow structure of eastern Long Island Sound; (2) determine the geologic framework and Quaternary development of the study area; (3) identify and map potential geologic hazards; and (4) test the 300 J pressurized minisparker across Block Island Sound and compare records with Uniboom records from ASTERIAS 81-2, Block Island Sound cruise, September 1982.
Start Date: 1982-09-08
End Date: 1982-09-19
Equipment Used: Single channel hydrophone, EG&G 234, Edo Western Sidescan and 2.5 kHz sub-bottom system, Loran-C
Information to be Derived: Sea floor map; Morphology;
Summary of Activity and Data Gathered: Despite numerous equipment failures during the first 4 days of the survey, the Uniboom data were very good (excellent resolution and good penetration) except in areas underlain by gas which attenuated the signal. Sidescan sonar records were satisfactory. Records collected in Block Island Sound using the minisparker system were compared to former Uniboom records. The sparker records were found to be inferior in resolution and penetration. Minisparker: 43 km; Uniboom: 677 km; Sidescan sonar: 511 km.
Staff: Jack Connell, Sally Needell
Notes: Original Center People field contained: Sally Wood Needell, Chief Scientist; Jack Connell, Electronics Technician. Original Submitted By field contained: Sally Wood Needell.
Block Island Sound;
Poppe, L.J., Williams, S. J., Moser, M. S., Forfinski, N. A., Stewart, H. F., and Doran, E. F., 2008, Quaternary geology and sedimentary processes in the vicinity of Six Mile Reef, eastern Long Island Sound: Journal of Coastal Research, v. 24 no. 1, doi: 10.2112/06-0743.1.
Poppe, L.J., Denny, J.F., Williams, S.J., Moser, M.S., Forfinski, N.A., Stewart, H.F., and Doran, E.F., 2007, The geology of Six Mile Reef, Eastern Long Island Sound: URL: http://pubs.usgs.gov/of/2007/1191/.
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: URL: http://woodshole.er.usgs.gov/openfile/of02-002/.