1. Leg 181 Synthesis: Fronts, Flows, Drifts, Volcanoes, and the Evolution of the Southwestern Gateway to the Pacific Ocean, Eastern New Zealand

ABSTRACT

INTRODUCTION

PRINCIPAL RESULTS FROM LEG 181

HISTORY OF SEDIMENTATION UNDER THE DEEP WESTERN BOUNDARY CURRENT

ENZOSS REVISITED: THE HISTORY OF PACIFIC DEEP FLOW

Late Cretaceous-Late Eocene Rift-Drift: Start of the Kaikoura Synthem

Opening of the Tasmanian Gateway: ENZOSS is Born

Oligocene Starvation and Erosion: Marshall Paraconformity

Implications of the Revised Age of the Eocene/Oligocene Boundary

Biopelagic Accumulation Resumes: Late Oligocene Drifts, Site 1124

Opening of Drake (Powell) Passage

Miocene DWBC Drift Accumulation

Post-Middle Miocene Volcanic Supply

ENZOSS Climatic Record and Origin of Ocean Circulation and Fronts

Bounty, Hikurangi, and Solander Channels and Other Late Neogene Sediment Sources to the DWBC

Glacial-Interglacial Influences on Sediment Supply and Distribution

TEN PRINCIPAL CONCLUSIONS: SUMMARY OF ODP LEG 181

FUTURE INVESTIGATIONS

ACKNOWLEDGMENTS

REFERENCES

CHAPTER NOTES

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