Supplementary material 2. Table of biostratigraphic data from borehole AT-8 #1 ST. Reports 1–3 are assumed to reflect different analysis of the recovered core material that may, in certain instances, be from the same depth, but which may describe different fauna; e.g. 14310 m in Report 1 (Globoquadrina altispira) and 2 (Globorotalia menardii, coiling change left/right), which both yield an Upper Pliocene age, and 8160 m in Report 1 (Gephyrocapsa aperta acme) and 2 (Stilostomella antillea), which

Supplementary material 2. Table of biostratigraphic data from borehole AT-8 #1 ST. Reports 1–3 are assumed to reflect different analysis of the recovered core material that may, in certain instances, be from the same depth, but which may describe different fauna; e.g. 14310 m in Report 1 (Globoquadrina altispira) and 2 (Globorotalia menardii, coiling change left/right), which both yield an Upper Pliocene age, and 8160 m in Report 1 (Gephyrocapsa aperta acme) and 2 (Stilostomella antillea), which both yield a Lower Pleistocene age.

补充材料2：AT-8 #1 ST钻孔生物地层学数据表。本说明假定编号1至3的分析报告对应回收岩心试样的不同分析流程：在部分情形下，尽管分析所用的岩心试样取自同一深度，但所描述的动物群却存在差异。例如：报告1中14310米层位的Globoquadrina altispira与报告2中的Globorotalia menardii（壳体旋向左右转变），二者的定年结果均为上新世晚期；报告1中8160米层位的Gephyrocapsa aperta acme与报告2中的Stilostomella antillea，二者的定年结果均为早更新世。