Other ID: AST 81-2
Status: Completed
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Funding Program(s):
Principal Investigator(s): Sally Needell
Affiliate Investigator(s): Ralph Lewis - CT DEP, LISRC
Information Specialist(s):
Data Type(s): Location-Elevation: Navigation, Seismics: Boomer, Seismics: Sub Bottom Profiler, Sonar: Sidescan
Scientific Purpose/Goals: Define the geology and shallow structure of Block Island Sound and eastern Long Island Sound; determine the geologic framework and Quaternary development of Block Island Sound; identify and map potential geologic hazards; and complement a similar study in Rhode Island Sound.
Vehicle(s):
Start Port/Location: Woods Hole, MA
End Port/Location: Woods Hole, MA
Start Date: 1981-09-10
End Date: 1981-09-18
Equipment Used: EG&G 234, Edo Western Sidescan and 2.5 kHz sub-bottom system, Loran-C, Single channel hydrophone
Information to be Derived: Sea floor map; Morphology;
Summary of Activity and Data Gathered: High-resolution seismic reflection profiling: 702 km; Sidescan sonar recording: 402 km.
Staff: Frank W. Jennings, Sally Needell
Affiliate Staff:
Ralph Lewis - geologist
CT DEP
Notes: Operational procedures: Seismic sound source/receiver position = 10 m astern; Seismic sound source/receiver separation = 10 m; Seismic recorder sweep rate = 0.25 s; Seismic sound source trigger interval = 0.5 s; Band pass filter setting = 400-4000 Hz; Sidescan sonar fish off starboard beam; Sidescan slant range varied 400, 200, 100 m each side of vessel; LORAN-C primary transmitter in Seneca, NY (9960 Northeast chain); LORAN-C secondary transmitters: W = Caribou, ME and Y = Carolina Beach, NC (9960 Northeast chain); Position logged at 5 min. intervals; Average ship speed = 5 kts. Original Center People field contained: Sally Wood Needell - Ch. Sci., Frank Jennings - ET.
Project = New England Coastal Geology, New England Coastal Geology
Location:
Block Island Sound, Rhode Island, Connecticut, Long Island Sound, United States, North America, North Atlantic;
| Boundaries | |||
|---|---|---|---|
| North: 41.35298853 | South: 41.053006 | West: -72.21176147 | East: -71.48117065 |
Platform(s):
 Asterias |
Needell, S.W., and Lewis, R.S., 1982, High-resolution seismic-reflection profiles and sidescan-sonar records collected on Block Island Sound by U.S. Geological Survey, R/V ASTERIAS Cruise AST 81-2: U.S. Geological Survey Open-File Report 82-322, https://doi.org/10.3133/ofr82322.
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 2002-002, https://doi.org/10.3133/ofr022.
| Title | Survey Equipment | Description |
|---|---|---|
| Cruise report | (document not focused on specific equipment) | Chief Scientist's cruise report of personnel, equipment and operational procedures, and brief cruise narrative. |
| Survey Equipment | Survey Info | Data Type(s) | Data Collected |
|---|---|---|---|
| EG&G 234 | --- | Boomer | |
| Edo Western Sidescan and 2.5 kHz sub-bottom system | --- | Sub Bottom Profiler Sidescan | 1981-032-FA-SO-001 (microfilm of ) |
| Loran-C | --- | Navigation | 1981-032-FA-LN-001 (Navigation trackline plot for field activity 81032) 1981-032-FA-LN-002 (Navigation data) |
| Single channel hydrophone | --- | Air Gun / Water Gun Boomer Bubble Gun Sparker Sub Bottom Profiler | 1981-032-FA-SE-003 (analog tape of seismic data) 1981-032-FA-SE-001-01 (31 scanned record sections in TIFF format.) 1981-032-FA-SE-002 (microfilm of ) 1981-032-FA-SE-001 ( Collection of paper record displays of seismic data( UNI) for lines ) |
