INTRODUCTION

Ocean Drilling Program (ODP) Leg 198 returned to Shatsky Rise in the northwest Pacific, revisiting the South High drilled during Deep Sea Drilling Project (DSDP) Legs 6, 32, and 86, as well as ODP Leg 132 (Figs. F1, F2; Fischer, Heezen, et al., 1971; Larson, Moberly, et al., 1975; Heath, Burkle, et al., 1985; Storms, Natland, et al., 1991). In addition, Leg 198 also occupied one site each on the Central and North Highs (Figs. F1, F3, F4). A high-resolution seismic reflection survey was carried out in 1994 to determine the origin and evolution of the rise and to obtain site survey data required for ocean drilling. The purpose of this paper is to present these seismic reflection data as a first step toward integrating the regional seismic reflection data set with the Leg 198 coring and logging data.

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