Calcareous nannofossil biostratigraphy of ODP Leg 134 sites@en

Seven sites drilled in the central New Hebrides Island Arc during Ocean Drilling Program Leg 134 yielded varying quantities of upper Eocene through Pleistocene calcareous nannofossils. Most of the Miocene and Pliocene strata were absent from Sites 827-831 drilled along the collisional boundary between the Australia and Pacific plates where the North d'Entrecasteaux Ridge and Bougainville Guyot are being subducted. Sites 832 and 833, drilled in the intra-arc North Aoba Basin, contained upper Miocene through Pleistocene and early Pliocene through Pleistocene nannofossils, respectively. Detailed range charts displaying species abundances and age interpretations are presented for all of the sites. […]在大洋钻探计划（Ocean Drilling Program）第134航次期间，于新赫布里底群岛岛弧（New Hebrides Island Arc）中部钻取的7个站位，均产出了丰度各异的始新世上部至更新世钙质超微化石（calcareous nannofossils）。沿澳大利亚板块与太平洋板块碰撞边界钻取的827至831站位，因北恩德雷卡斯托海岭（North d'Entrecasteaux Ridge）与布干维尔海山（Bougainville Guyot）正处于俯冲过程中，缺失了大部分中新世与上新世地层。位于弧内北奥巴盆地（intra-arc North Aoba Basin）的832与833站位，分别产出了中新世上部至更新世以及上新世早期至更新世的钙质超微化石。所有站位均附有展示物种丰度与年龄解释的详细物种延限图表……