We thank the captain, crew, and technical staff of the Thomas Thompson. Perry Crampton and Seth Mogk from Scripps Institution of Oceanography (University of California, San Diego) provided seismic data acquisition services. A number of scientists (Masao Nakanishi of the Ocean Research Institute, University of Tokyo, in particular), student watch standers, and Earthwatch volunteers contributed to the shipboard data collection. Michael Holzrichter provided invaluable expertise and attention to detail while processing seismic data. Mauricio Canon assisted with seismic figure preparation. Adam Klaus acknowledges the Ocean Drilling Program (ODP) for supporting his involvement throughout the project. We used GMT software (Wessel and Smith, 1995) to produce the maps. This work funded by National Science Foundation (ODP) grant OCE93-14229.