"Table 3. Nannofossil datums, absolute ages, and depths at Site 1001." "Notes: T = top of species range (last appearance datum), B = base of species range (first appearance datum). * = secondary marker used to define zone." Hole 1001A Hole 1001B Event Zone (base) Age (Ma) "Core, section, interval (cm)" Depth (mbsf) "Core, section, interval (cm)" Depth (mbsf) Hole A Hole B B Emiliania huxleyi CN15 0.248 Above uppermost sample T Pseudoemiliania lacunosa CN14b 0.408 1R-CC to 2R-CC 3.61 T Reticulofenestra asanoi 0.88 "2R-CC to 3R-1, 70" 12 B Gephyrocapsa parallela CN14a 0.94 "3R-1, 70 to 3R-CC" 17.38 B Reticulofenestra asanoi 1.17 "3R-1, 70 to 3R-CC" 17.38 T large Gephyrocapsa spp. 1.23 3R-CC to 4R-CC 22.23 T Helicosphaera sellii 1.26 3R-CC to 4R-CC 22.23 B large Gephyrocapsa spp. 1.48 "4R-CC to 5R-1, 70" 31.19 B Gephyrocapsa oceanica 1.64 "4R-CC to 5R-1, 70" 31.19 T Calcidiscus macintyrei 1.64 "4R-CC to 5R-1, 70" 31.19 B Gephyrocapsa caribbeanica CN13b 1.71 "4R-CC to 5R-1, 70" 31.19 T Discoaster brouweri CN13a 1.95 "4R-CC to 5R-1, 70" 31.19 T Discoaster pentaradiatus CN12d 2.36 "5R-1, 70 to 5R-CC" 36.36 T Discoaster surculus CN12c 2.51 "5R-1, 70 to 5R-CC" 36.36 T Discoaster tamalis CN12b 2.82 "5R-1, 70 to 5R-CC" 36.36 T Sphenolithus spp. 3.62 "8R-1, 70 to 8R-2, 70" 65.65 T R. pseudoumbilicus CN12a 3.83 "8R-3, 70 to 8R-4, 70" 68.65 T Amaurolithus spp. CN11 4.5 "9R-2, 69 to 9R-CC" 76.63 B Ceratolithus rugosus CN10c 5.046 "10R-2, 69 to 10R-CC" 86.04 T Ceratolithus acutus 5.046 "10R-2, 69 to 10R-CC" 86.04 B Ceratolithus acutus CN10b 5.089 "10R-2, 69 to 10R-CC" 86.04 T Discoaster quinqueramus CN10a 5.537 "10R-2, 69 to 10R-CC" 86.04 B Amaurolithus spp. CN9b 7.392 "12R-CC to 13R-1, 70" 111.8 B Discoaster berggrenii CN9a 8.281 "13R-7, 70 to 13R-CC" 121.95 T Discoaster hamatus CN8a 9.635 "15R-5, 70 to 15R-6, 70" 138.95 B Discoaster hamatus CN7 10.476 "15R-CC to 16R-1, 70" 141.22 B Catinaster coalitus CN6 10.794 "16R-3, 70 to 16R-4, 70" 145.45 T Sphenolithus heteromorphus 13.523 "18R-4, 38 to 18R-4, 85" 165.42 B Discoaster lodoensis CP10 52 19R-CC to 20R-CC 169.89 T Fasciculithus tympaniformis 55.3 "26R-CC to 27R-1,79" 234.1 "5R-CC to 6R-1, 29" 232.31 B Discoaster multiradiatus CP8 56.2 29R-CC to 31R-CC 267.79 "8R-CC to 9R-1, 10" 262.29 B Discoaster mohleri CP7 57.5 "31R-CC to 32R-1, 6" 280.6 "11R-2, 30 to 11R-3, 28" 285.94 B Heliolithus kleinpellii CP5 58.4 "33R-1, 113 to 33R-2, 110" 296.77 "12R-1, 0 to 12R-2, 0" 293.65 B Fasciculithus tympaniformis CP4 59.7 "36R-2, 149 to 36R-4, 17" 327.63 "15R-4, 62 to 15R-5, 98" 327.7 B Fasciculithus spp. 59.9 "36R-2, 149 to 36R-4, 17" 327.63 "15R-5, 98 to 15R-CC" 328.72 B Sphenolithus primus 60.6 "36R-4, 17 to 36R-5, 21" 329.24 "16R-1, 45 to 16R-2, 4" 332.45 B Cruciplacolithus primus 64.8 "37R-8, 30 to 38-CC, 0" 348.07 "17R-4, 62 to 17R-CC" 346.26 T Cretaceous spp. CP1a 65 "38-CC, 0 to 38-CC, 33" 352.19 17R-CC to 18R-CC 350.5 B Micula murus 66.2 40R-CC to 41R-CC 373.75 19R-CC to 20R-CC 365.38 T Quadrum trifidum 71.3 45R-CC to 46R-CC 420.29 25R-CC to 26R-CC 419.04 T Aspidolithus parcus 74.5 48R-CC to 49R-CC 448.24 "28R-CC to 29R-3, 23" 444.65 T Eiffellithus eximius CC23* 75 49R-CC to 50R-CC 459.81 "29R-3, 23 to 29R-CC" 450.12 B Quadrum trifidum CC22 76 "51R-CC to 52R-3, 149" 478 30R-CC to 31R-CC 470.67