Nannofossil biohorizons for ODP Leg 133 sites@en

Paleontological studies conducted subsequent to the completion of Leg 133 led to refinements of the biostratigraphy for the Leg 133 sites. These biostratigraphic refinements bear on the calculations of sedimentation rates and on the age-depth plots prepared for the Initial Reports volume for Leg 133. To make available the revised data to anyone who may wish to make use of it, the revised biostratigraphic information is presented here in tabulated form. Revised age-depth plots also are presented for all of the sites to facilitate comparison of sedimentation rate curves and to identify intervals where significant changes have been made based on post-cruise studies. The revised age-depth plots include calcareous nannofossils only, and the revised data have been taken from thechapters contributed for this volume (Gartner et al., 1993, doi:10.2973/odp.proc.sr.133.213.1993; Wei and Gartner, 1993, doi:10.2973/odp.proc.sr.133.216.1993). Planktonic foraminifer biostratigraphy revisions became available subsequently and could not be readily incorporated. The age-depth plots for Sites 812 through 818 were made with the (ADP) program provided to ODP by Dave Lazarus.在第133航次（Leg 133）完成后开展的古生物学研究，对该航次各站位的生物地层学（biostratigraphy）研究进行了修正完善。这些生物地层学修正成果，与第133航次初始报告卷册中涉及的沉积速率计算及年龄-深度图件编制密切相关。为向所有有需求的使用者提供修订后的数据，本文以表格形式呈现了修正后的生物地层学信息。同时还提供了所有站位的修订版年龄-深度图件，以便于对比沉积速率曲线，并识别出基于航次后研究做出了重大修正的地层区间。本次修订的年龄-深度图件仅包含钙质超微化石（calcareous nannofossils）相关内容，修订数据均取自本卷册的供稿章节（Gartner等人，1993，doi:10.2973/odp.proc.sr.133.213.1993；Wei与Gartner，1993，doi:10.2973/odp.proc.sr.133.216.1993）。后续又出现了浮游有孔虫生物地层学的修正成果，但未能及时纳入本次修订。第812至818站位的年龄-深度图件，是使用戴夫·拉扎勒斯（Dave Lazarus）提供给大洋钻探计划（Ocean Drilling Program, ODP）的ADP程序编制完成的。