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.