College Station, Tex. : Ocean Drilling Program, Texas A & M University
Abstract
To facilitate the selection of drill sites for Leg 138, a site survey
program was conducted on board the Scripps Institution of
Oceanography's research vessel Thomas Washington (Cruise Venture
1). During this cruise, which departed San Diego on 30 August 1989
and arrived in Manzanillo, Mexico, on 4 October 1989, more than
11,800 km of SeaBeam bathymetry, 8800 km of single-channel digital
seismic data, and more than 200 m of sediment cores were collected.
In addition to aiding in the selection of Leg 138 drill sites, the data
collected during Venture Leg 1, in its own right, will provide important
information about the response of the equatorial Pacific to global
changes in climate. The site survey cruise, like the drilling program,
concentrated its efforts on two north-south transects across the major
eastern equatorial oceanic boundaries. In addition, during the cruise,
scientists collected SeaBeam and seismic data between the two transects
and conducted several ancillary programs. In this chapter, we
briefly describe the data collected during this site survey cruise;
SeaBeam bathymetry and seismic profiles for each drill site are
presented in the individual site chapters
