Table T4. Estimated ages of calcareous nannofossil events used during Leg 186, based on the time scales of Cande and Kent (1995) and Berggren et al. (1995).

Event		Zone (base)	Age (Ma)	Reference
FO	acme Emiliania huxleyi		0.085	1
LO	Helicosphaera inversa		0.155	2
FO	Emiliania huxleyi	CN15	0.248	2
LO	Pseudoemiliania lacunosa	CN14b	0.408	2
FO	Helicosphaera inversa		0.505	2
LO	Reticulofenestra asanoi		0.88	3
FO	Gephyrocapsa parallela	CN14a	0.94	3
FO	Reticulofenestra asanoi		1.17	3
LO	Helicosphaera sellii		1.26	3
LO	Calcidiscus macintyrei		1.64	3
FO	Gephyrocapsa oceanica		1.64	3
FO	Gephyrocapsa caribbeanica	CN13b	1.71	4
	Pliocene/Pleistocene boundary		1.745	2
LO	Discoaster brouweri	CN13a	1.95	3
LO	Discoaster pentaradiatus	CN12d	2.36	3
LO	Discoaster surculus	CN12c	2.51	3
LO	Discoaster tamalis	CN12b	2.82	2
LO	Sphenolithus spp.	CN12a	3.62	5
LO	Reticulofenestra pseudoumbilicus	CN12a	3.83	3
LO	Amaurolithus spp.	CN11	4.50	6
FO	Ceratolithus rugosus	CN10c	5.046	7
FO	Ceratolithus acutus	CN10b	5.089	7
LO	Triquetrorhabdulus rugosus		5.231	7
	Miocene/Pliocene boundary		5.3
LO	Discoaster quinqueramus	CN10a	5.537	7
LO	Amaurolithus amplificus		5.993	7
FO	Amaurolithus amplificus		6.840	7
LO	paracme R. pseudoumbilicus		7.100	7
FO	Amaurolithus spp.	CN9b	7.392	7
FO	Discoaster berggrenii	CN9a	8.281	7
FO	Discoaster loeblichii	CN8b	8.7	8
FO	paracme R. pseudoumbilicus		8.788	7
LO	Discoaster hamatus	CN8a	9.635	7
LO	Catinaster calyculus		9.641	7
FO	Discoaster neohamatus		10.450	7
FO	Discoaster hamatus	CN7	10.476	7
FO	Catinaster calyculus		10.705	7
FO	Catinaster coalitus	CN6	10.794	7
LO	Coccolithus miopelagicus		10.941	7
LO	Discoaster kugleri		11.520	7
FO	Discoaster kugleri	CN5b	11.831	7
LO	Cyclicargolithus floridanus		13.2	9
LO	Sphenolithus heteromorphus	CN5a	13.523	7
LO	Helicosphaera ampliaperta	CN4	15.6	8
LO	abundant Discoaster deflandrei		16.2	9
FO	Sphenolithus heteromorphus	CN3	18.2	8
LO	Sphenolithus belemnos		18.3	8
FO	Sphenolithus belemnos	CN2	19.2	8
FO	Discoaster druggii	CN1c	23.3	10
LO	Sphenolithus capricornutus		23.7	8
	Oligocene/Miocene boundary		23.8
LO	Sphenolithus delphix		23.8	8
LO	Reticulofenestra bisecta	CN1a	23.9	8

Notes: FO = first occurrence, LO = last occurrence. References are as follows: 1 = Thierstein et al. (1977); 2 = modified from Takayama and Sato (1987), Sato et al. (1991), Takayama (1993), and Kameo et al. (1995); 3 = Wei (1993); 4 = Berger et al. (1994); 5 = Backman and Schackleton (1983); 6 = Backman et al. (1990); 7 = Backman and Raffi (1997); 8 = Berggren et al. (1995); 9 = Raffi and Flores (1995).