Table 3. Nannofossil datums, absolute ages, and depths at Site 1000.
Note: T = top of species range (last appearance datum), B = base of species range (first appearance datum).

Event	Zone (base)	Age (Ma) 	Core, section, interval (cm)	Depth (mbsf)

Hole 1000A:
B  Emiliania huxleyi	CN15	0.248	1H-CC to 2H-1, 50	3.60
T  Pseudoemiliania lacunosa	CN14b	0.408	3H-1, 50 to 3H-2, 50	13.92
T  Reticulofenestra asanoi		0.88	4H-2, 50 to 4H-3, 50	25.05
B  Gephyrocapsa parallela	CN14a	0.94	4H-5, 50 to 4H-6, 50	29.55
B  Reticulofenestra asanoi		1.17	4H-CC to 5H-1, 50	32.01
T  large Gephyrocapsa spp.		1.23	4H-6, 50 to 4H-CC	32.01
T  Helicosphaera sellii		1.26	5H-3, 50 to 5H-4, 50	36.05
B  large Gephyrocapsa spp.		1.48	5H-6, 50 to 5H-6, 130	40.20
B  Gephyrocapsa oceanica		1.64	5H-6, 130 to 5H-CC	40.98
T  Calcidiscus macintyrei		1.64	5H-6, 130 to 5H-CC	40.98
B  Gephyrocapsa caribbeanica	CN13b	1.71	6H-2, 50 to 6H-3, 50	44.05
T  Discoaster brouweri	CN13a	1.95	7H-1, 50 to 7H-2, 50	52.05
T  Discoaster pentaradiatus	CN12d	2.36	8H-1, 50 to 8H-2, 50	61.55
T  Discoaster surculus	CN12c	2.51	8H-5, 50 to 8H-6, 50	67.55
T  Discoaster tamalis	CN12b	2.82	9H-5, 50 to 9H-6, 50	77.05
T  Sphenolithus spp.		3.62	13H-1, 60 to 13H-2, 60	109.15
T  R. pseudoumbilicus	CN12a	3.83	14H-2, 50 to 14H-3, 50	120.05
T  Amaurolithus spp.	CN11	4.50	16H-7, 50 to 16H-CC	146.06
B  Ceratolithus rugosus	CN10c	5.046	17H-4, 50 to 17H-5, 50	151.55
T  Ceratolithus acutus		5.046	17H-5, 50 to 17H-6, 50	153.05
B  Ceratolithus acutus	CN10b	5.089	19H-1, 50 to 19H-2, 50	166.05 
T  Discoaster quinqueramus	CN10a	5.537	19H-7, 50 to 19H-CC	174.53
B  Amaurolithus spp.	CN9b	7.392	27H-CC to 28H-1, 50	250.79
B  Discoaster berggrenii	CN9a	8.281	31H-5, 50 to 31H-6, 50	286.05
T  Discoaster hamatus	CN8a	9.635	36X-6, 50 to 36X-CC	331.11
B  Discoaster hamatus	CN7	10.476	40X-CC to 41X-1, 50	370.65
B  Catinaster coalitus	CN6	10.794	41X-5, 50 to 41X-6, 50	377.25
T  Cyclicargolithus floridanus		13.23	45X-4, 50 to 45X-5, 50	414.75
T  Sphenolithus heteromorphus	CN5a	13.523	55X-6, 50 to 55X-CC	513.64
T  Helicosphaera ampliaperta	CN4	15.6	Below base of section

Hole 1000B:
T  Helicosphaera ampliaperta	CN4	15.6	8R-4, 50 to 8R-5, 50	557.35
B  Sphenolithus heteromorphus	CN3	18.2	17R-4, 50 to 17R-5, 50	642.30
T  Sphenolithus belemnos		18.3	17R-4, 50 to 17R-5, 50	642.30
B  Sphenolithus belemnos	CN2	19.2	20R-2, 42 to 20R-CC	668.90