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doi:10.2204/iodp.proc.317.202.2013

Introduction

Integrated Ocean Drilling Program (IODP) Expedition 317 cored subtidal to lower bathyal sediments of Holocene to late Eocene age (0–36 Ma) in a transect across the Canterbury Basin continental shelf and slope (Fig. F1). Sequence stratigraphic processes influenced calcareous nannofossil and planktonic foraminiferal assemblages, and these are strongly reflected in the overall abundance, preservation, and assemblage variations in relation to lithology. These variations may have been influenced by a number of factors, including global climate, local paleoceanography, changes in sea level, and tectonic uplift along the Alpine Fault.

Quaternary diatom assemblages of the southwestern midlatitude Pacific Ocean are not well known because of their poor preservation in predominantly calcareous sediments, although several expeditions (e.g., Deep Sea Drilling Project [DSDP] Legs 29 and 90 and Ocean Drilling Program [ODP] Leg 181) have investigated Cretaceous through Neogene sediments in the region (Hajós and Stradner, 1975; Hajós, 1976; Ciesielski, 1986; McMinn et al., 2001). Moreover, diatom assemblages from the shallower marine environments, including nonmarine and littoral facies in the southwestern Pacific Ocean, are less well known. This report presents the diatom occurrences and abundances and range charts for the taxa recovered in cores from Hole U1352B.

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