Alternate number:

N80-1

Platform:

Owner-Operator:

U.S. Geological Survey (USGS), Woods Hole, MA

Captain:

Paul Loud, USGS

Center Principal:

Charles J. O'Hara

Area of Operations:

Western Rhode Island Sound, Rhode Island, United States, North America, North Atlantic

Bounding Coordinates (degrees)

North:

41.75

South:

41.25

West:

-71.75

East:

-71

Start and End Dates:

July 9, 1980, to October 3, 1980

Start and End Ports:

from Cataumet, MA, to Cataumet, MA

Days at Sea:

13

Project Number:

9450-02421

Project Title:

Coastal, estuarine, and lacustrine studies

Type of Activity:

Seismic profiling
Sea-floor mapping

Objectives:

(1) Define geology and shallow structure of western Rhode Island Sound, (2) identify and map potential geologic hazards, (3) determine geologic framework and Quaternary development of this part of Atlantic Inner Continental Shelf, (4) select sites for possible coring in summer 1981, and (5) complement similar data and results of previous USGS studies in eastern Rhode Island Sound.

Information to be derived:

Sea-floor map
Morphology

Scientific Party
(USGS):

Charles J. O'Hara, Chief Scientist; Frank Jennings, Electronic Technician; Paul Loud, Boat operator; Sally Wood Needell, geologist (July 9-17, 1980); Rusty Tirey, marine operations (Sep 29-Oct 3, 1980); Sandra Conley, geologist (Sep 29-Oct 3, 1980).

Scientific Equipment:

EG&G Uniboom seismic profiling system (EPC graphic recorder)
EDO Western sidescan-sonar system (EDO graphic recorder)
Northstar 6000 LORAN-C navigator and repeater
Texas Instruments Silent 700 ASP terminal (navigation log, leg 1 only, July 9-17)
Hewlett-Packard Instrumentation recorder (Uniboom seismic, leg 1 only, July 9-17)
Teledyne Exploration Seismic amplifier
Krohn-Hite Band Pass filter
Del Norte and EG&G hydrophone streamers

Navigation techniques used:

LORAN-C

Summary of Results:

High-resolution subbottom profiles: 580 km; Sidescan-sonar sonographs: 580 km

Continuous Data (in km):

580

Remarks:

Leg 1: July 9-17, 1980; Leg 2: Sept 29-Oct 3, 1980

Contact:

Charles J. O'Hara