Table T4. Planktonic foraminifer datums, Hole 1146A.
Datum
Stratigraphic
position
Age
(Ma)
Top
Bottom
Average
depth
(mcd)
Core, section,
interval (cm)
Depth
(mbsf)
Depth
(mcd)
Core, section,
interval (cm)
Depth
(mbsf)
Depth
(mcd)



184-1146A-

184-1146A-


FO Sphaeroidinella dehiscens Top Zone N18/Bottom Zone N19 5.54 33X-1, 9-12 299.61 318.36 33X-3, 14-17 302.66 321.41 319.88
FO Globorotalia tumida Top Zone N17b/Bottom Zone N18 5.82 33X-3, 14-17 302.66 321.41 33X-5, 9-12 305.61 324.36 322.88
LO Globorotalia lenguaensis
6.0 36X-CC, 5-9 337.9 360 37X-2, 0-2 339.61 362.36 361.18
FO Globigerinoides conglobatus
6.2 38X-CC, 0-2 357.15 380.9 39X-2, 0-2 358.81 382.61 381.76
FO Pulleniatina primalis Top Zone N17a/Bottom Zone N17b 6.4 34X-CC, 5-9 318.61 337.56 35X-1, 10-14 318.82 338.52 338.04
FO Globorotalia plesiotumida Top Zone N16/Bottom Zone N17a 8.58 41X-4, 0-2 381.01 406.63 41X-6, 0-2 384.01 409.63 408.13
FO Globorotalia extremus
8.58 41X-6, 0-2 384.01 409.63 41X-CC, 0-2 385.99 411.61 410.62
FO Neogloboquadrina acostaensis Top Zone N15/Bottom Zone N16 9.82 44X-3, 0-2 408.31 432.38 44X-4, 0-2 409.81 433.88 433.13
LO Paragloborotalia mayeri Top Zone N14/Bottom Zone N15 10.49 45X-4, 0-2 419.41 443.83 45X-5, 0-2 420.91 445.33 444.58
FO Globoturborotalita nepenthes Top Zone N13/Bottom Zone N14 11.19 48X-1, 0-2 443.71 471.92 48X-2, 0-2 445.21 473.42 472.67
LO Globorotalia fohsi s.l. Top Zone N12/Bottom Zone N13 11.68 47X-6, 0-2 441.61 469.53 47X-7, 0-2 443.11 471.03 470.28
FO Globorotalia fohsi s.l. Top Zone N11/Bottom Zone N12 13.42 51X-4, 0-2 476.91 504.1 51X-5, 0-2 478.41 505.6 504.85
FO Globorotalia praefohsi Top Zone N10/Bottom Zone N11 14.0 52X-CC, 0-2 491.41 519.85 53X-2, 0-2 493.11 523 521.43
FO Globorotalia peripheroacuta Top Zone N9/Bottom Zone N10 14.8 54X-1, 0-2 501.21 531.95 54X-3, 0-2 504.21 534.95 533.45
LO Praeorbulina sicana
14.8 54X-CC, 0-2 509.07 539.81 55X-2, 0-2 512.31 542.95 541.38
FO Globorotalia praemenardii
14.9 54X-CC, 0-2 509.07 539.81 55X-2, 0-2 512.31 542.95 541.38
LO Globigerinatella insueta
15.0 54X-CC, 0-2 509.07 539.81 55X-2, 0-2 512.31 542.95 541.38
FO Orbulina suturalis Top Zone N8/Bottom Zone N9 15.1 54X-CC, 0-2 509.07 539.81 55X-2, 0-2 512.31 542.95 541.38
FO Praeorbulina sicana Top Zone N7/Bottom Zone N8 16.4 62X-2, 10-14 579.62 616.41 62X-3, 10-14 581.12 617.91 617.16
LO Catapsydrax dissimilis Top Zone N6/Bottom Zone N7 17.3 62X-5, 7-11 584.09 620.88 62X-7, 10-14 586.92 623.71 622.3
FO Globigerinatella insueta Top Zone N5/Bottom Zone N6 18.8 64X-2, 10-14 598.82 634.81 64X-4, 9-13 601.81 637.8 636.31
LO Globoquadrina binaiensis
19.1 64X-6, 8-12 604.8 640.79 64X-7, 12-16 606.34 642.33 641.95
Bottom of hole




64X-CC, 10-14 606.83 643.11 643.11

Notes: Boldface ages are astrochronologically tuned (from Chaisson and Pearson, 1997, Berggren et al., 1995, and Curry et al., 1995). FO = first occurrence, LO = last occurrence.