Alternate Leg ID: AST 82-3
Area of Operations: Long Island Sound, New York, Connecticut, United States, North America, North Atlantic
Block Island Sound
Dates: September 08, 1982 to September 19, 1982
Objectives: (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.
Type of Activity: Sea floor mapping
Information to be derived: Sea floor map
Summary: 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.
USGS Project Number: 9540-00479
Contact: Sally Needell ()