Table 4. Planktonic foraminifer datums, absolute ages, and depths at Site 1000. Note: FO = first occurrence, LO = last occurrence. Event Zone (base) Age (Ma) Core, section, interval (cm) Depth (mbsf) Hole 1000A: LO Globigerinoides fistulosus 1.7 4H-CC to 5H-CC 36.55 FO Truncorotalia truncatulinoides N22 2.0 4H-CC to 5H-CC 36.55 LO Menardella exilis 2.2 4H-CC to 5H-CC 36.55 LO Menardella miocenica 2.3 6H-CC to 7H-CC 55.55 Reappearance of Pulleniatina (Atlantic) 2.3 6H-CC to 7H-CC 55.55 LO Menardella pertenuis 2.6 6H-CC to 7H-CC 55.55 LO Menardella multicamerata 3.0 10H-CC to 11H-CC 93.55 LO Dentoglobigerina altispira 3.0 10H-CC to 11H-CC 93.55 FO Menardella miocenica N21/N20 3.6 12H-CC to 13H-CC 112.55 LO Hirsutella margaritae 3.6 13H-CC to 14H-CC 122.05 LO Globorotalia plesiotumida 4.4 12H-CC to 13H-CC 112.55 FO Menardella exilis 4.5 15H-CC to 16H-CC 141.05 FO Truncorotalia crassaformis 4.7 15H-CC to 16H-CC 141.05 LO Hirsutella cibaoensis 5.0 16H-CC to 17H-CC 150.55 FO Sphaeroidinella dehiscens N19 5.6 23H-CC to 24H-CC 217.05 FO Hirsutella margaritae 6.0 25H-CC to 26H-CC 236.05 FO Globigerinoides conglobatus 6.2 22H-CC to 23H-CC 207.55 FO Hirsutella cibaoensis 8.0 39X-CC to 40X-CC 365.70 FO Globigerinoides extremus 8.1 32H-CC to 33H-CC 302.55 FO Candeina nitida 8.1 32H-CC to 33H-CC 302.55 FO Globorotalia plesiotumida N18/N17 8.2 35X-CC to 36X-CC 327.30 FO Neogloboquadrina acostaensis N16 10.0 38X-CC to 39X-CC 356.30 LO Paragloborotalia mayeri N15 10.3 39X-CC to 40X-CC 365.70 FO Globoturborotalita nepenthes N14 11.4 41X-CC to 42X-CC 384.90 LO Fohsella fohsi N13 11.9 42X-CC to 43X-CC 394.55 FO Fohsella fohsi robusta 12.7 45X-CC to 46X-CC 423.45 FO Fohsella fohsi N12 13.2 50X-CC to 51X-CC 471.50 FO Fohsella praefohsi N11 14.0 54X-CC to 55X-CC 510.00 Hole 1000B: FO Fohsella peripheroacuta N10 14.8 4R-CC to 5R-CC 527.60 FO Orbulina suturalis N9 15.1 4R-CC to 5R-CC 527.60 FO Praeorbulina circularis 16.0 5R-CC to 6R-CC 537.15 FO Praeorbulina glomerosa 16.1 6R-CC to 7R-CC 546.75 FO Praeorbulina sicana N8 16.4 10R-CC to 12R-CC 590.05 LO Catapsydrax dissimilis N7 17.3 15R-CC to 16R-CC 633.40