"Table 4. Planktonic foraminifer datums, absolute ages, and depths at Site 998." "Note: FO = first occurrence, LO = last occurrence. a = sample in a turbidite. b = sample in mixed sediments (40%-50% clay). c = sample in ash layer." Event Zone (base) Age (Ma) "Core, section, interval (cm)" Depth (mbsf) Hole 998A: LO Globigerinoides fistulosus 1.7 "4H-CC to 5H-2, 17 19a" 38.27 FO Truncorotalia truncatulinoides N22 2 "5H-2, 17 19a to 5H-2, 40 40" 39.01 LO Menardella miocenica 2.3 "5H-CC to 6H-2, 50 52" 48.45 LO Dentoglobigerina altispira 3 "7H-2, 40 42 to 7H-4, 40 42" 59.71 FO Globigerinoides fistulosus 3.2 "7H-4, 40 42 to 7H CC" 63.61 LO Hirsutella margaritae (N21/N20) 3.6 "8H-CCb to 9H-2, 40 42a" 76.39 LO Globoturborotalita nepenthes 4.3 "9H-CC to 10H-2, 40 42" 85.96 FO Menardella exilis 4.5 "10H-2, 40 42 to 10H-4, 40 42" 88.21 FO Truncorotalia crassaformis 4.7 "10H-2, 40 42 to 10H-4, 40 42" 88.21 FO Sphaeroidinella dehiscens N19 5.6 "11H-CCb to 12H-2, 39 41" 104.9 FO Hirsutella margaritae 6 "12H-2, 39 41 to 12H-4, 40 42" 107.2 FO Globigerinoides conglobatus 6.2 "12H-2, 39 41 to 12H-4, 40 42" 107.2 FO Globigerinoides extremus 8 "15H-4, 37 39 to 15H-CC" 139.52 FO Candeina nitida 8 "15H-4, 37 39 to 15H-CC" 139.52 FO Globorotalia plesiotumida N18/N17 8.2 "15H-CC to 16H-2, 40 42" 142.21 LO Paragloborotalia mayeri N16/N15 10.3 "16X-5, 41 43 to 16H-6, 40 42" 148.99 LO Fohsi fohsella N14/N13 11.8 "17H-CCb to 18X-1, 40 42" 161.03 FO Fohsi fohsella N12 13.5 20X-CC to 21X-CC 187.94 FO Fohsi praefohsi N11 14 22X-CCa to 23X-CC 208.21 FO Pohsi peripheroacuta N10 14.8 22X-CCa to 23X-CC 208.21 FO Praeorbulina circularis 16 23X-CC to 24X-CC 218.06 FO Praeorbulina sicana N9/N8 16.4 24X-CC to 25X-CC 226.65 LO Catapsydrax dissimilis N7 17.3 26X-CC to 27X-CC 245.74 FO Globigerinatella insueta s.l. N6 18.8 26X-CC to 27X-CC 245.74 LO Paragloborotalia kugleri N5 21.5 31X-CC to 32X-CC 280.49 FO Paragloborotalia kugleri N4 23.8 36X-CC to 37X-CC 340.74 FO Paragloborotalia pseudokugleri 25.9 41X-CC to 42X-CC 389.38 LO Paragloborotalia opima P22 27.1 47X-CC to 48X-CC 443.81 LO Ch. cubensis (common) P21b 28.5 52X-CC to 53X-CC 494.47 FO Globoturborotalita angulisuturalis P21a 29.4 53X-CC to 54X-CC 503.45 LO Turborotalia ampliapertura P20 30.3 55X-CC to 56X-CC 522 FO Paragloborotalia opima 30.6 57X-CC to 58X-CC 541.69 LO Pseudohastigerina spp. P19 32 59X-CC to 60X-CC 562.9 LO Hantkenina spp. 33.7 62X-CC to 63X-CC 588.51 LO Turborotalia cerroazulensis P18 33.8 Taxon not observed LO Turborotalia pomeroli 35.3 66X-CC to 67X-CC 625.69 Hole 998B: LO Pseudohastigerina spp. P19 32 Above 1R-CC LO Hantkenina spp. 33.7 3R-CC to 4R-CC 590.82 LO Turborotalia cerroazulensis P18 33.8 4R-CC to 590.82 LO Turborotalia pomeroli 35.3 9R-CC to 10R-CCa 638.33 LO Porticulasphaera semiinvoluta 35.3 3R-CC to 4R-CC 590.82 LO Acarinina collactea 37.7 4R-CC to 5R-CCa 600.29 LO Morozovella spinulosa 38.1 3R-CC to 4R-CC 590.82 FO Porticulasphaera semiinvoluta P15 38.4 4R-CC to 5R-CCa 600.29 LO Planorotalites 38.5 4R-CC to 5R-CCa 600.29 LO Acarinina spp. 37.5-38.5 4R-CC to 5R-CCa 600.29 LO Acarinina primitiva 39 6R-CC to 7R-CC 619.31 LO Globigerapsis beckmanni P14 40.1 6R-CC to 7R-CC 619.31 FO Globogerapsis beckmanni P13 40.5 8R-CC to 9R-CC 648.58 FO Turborotalia pomeroli 42.4 14R-CC to 15R-CC 693.66 FO Globigerapsis index 42.9 25R-CCc to 26R-CC 793.64 LO Morozovella aragonensis P12 43.6 19R-CC to 20R-CC 743.51 FO Globigerapsis kugleri P11 45.8 27R-CC to 28R-CC 813.03 FO Acarinina pentacamerata 50.8 Below 37R-CC FO Morozovella aragonensis 52.3 Below 37R-CC