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Table T11. Summary of biostratigraphic age assignments for Holes 1089A, 1089B, 1089C, and 1089D. (See table note.)

Core, section,
interval (cm) 		Depth
(mbsf) 		Depth
(mcd) 		Calcareous
nannofossil
zone 		Calcareous
nannofossil
age (Ma) 		Diatom
zone 		Diatom
age (Ma) 		Radiolaria
zone 		Radiolaria
age (Ma) 		Comment
                   
177-1089A-                  
1H-CC, 17-22 7.27 7.27 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
2H-CC, 16-21 16.90 16.90 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
3H-CC, 13-18 21.18 21.18 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
4H-CC, 22-27 30.66 30.66 NN21 0-0.26 T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
5H-2, 100-100 38.30 38.30 NN21 0-0.26          
                   
5H-2, 130-130 38.60 38.60 NN21 0-0.26          
5H-CC, 14-19 43.36 43.36 NN20 <0.46 dissolved T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
6H-CC, 18-23 52.25 52.25 NN20 0.26-0.46 T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
7H-CC, 51-56 63.43 63.43 NN20 0.26-0.46 T. lentiginosa Subzone a 0.42-0.65 ? >0.46  
8H-1, 120-120 65.50 65.50 NN19 >0.46          
                   
8H-3, 30-30 70.60 70.60 NN19 >0.46          
8H-CC, 9-14 74.03 74.03 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65 ? >0.46  
9H-CC, 10-15 75.24 75.24 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
10H-CC, 0-5 92.97 92.97 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
11H-CC, 53-58 97.90 97.90 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
                   
12H-4, 120-120 109.00 109.00 NN19 <0.88          
12H-6, 30-30 110.10 110.10 NN19 >0.88?          
12H-7, 30-30 111.50 111.50 NN19 >0.88?          
12H-CC, 0-5 111.59 111.59 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07 ? >0.46  
13H-CC, 0-5 111.80 111.80 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
                   
14H-CC, 11-16 130.07 130.07 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
15H-CC, 21-26 136.70 136.70 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
16H-CC, 9-14 149.24 149.24 NN19 Dissolved A. ingens Subzone b 1.07-1.3 ? >0.46  
18H-1, 30-30 159.60 159.60 NN19 >1.08          
18H-CC, 21-26 166.22 166.22 NN19 1.08-1.24 A. ingens Subzone b 1.07-1.3      
                   
19H-1, 120-120 170.00 178.01 NN19 >1.24          
19H-CC, 0-10 177.69 177.69 NN19 1.24-1.46 A. ingens Subzone b 1.07-1.3      
20H-CC, 13-23 187.48 187.48 NN19 1.24-1.46 A. ingens Subzone b 1.07-1.3 ? >0.46  
21H-CC, 21-26 195.09 195.09 NN19 >1.46 A. ingens Subzone a 1.3-1.8      
23H-1, 30-30 207.10 207.10 NN19 <1.69          
                   
23H-1, 120-120 207.60 207.60 NN19 <1.69          
23H-3, 120-120 209.50 209.50 NN19 <1.69          
23H-4, 120-120 212.50 224.80 NN19 >1069          
23H-CC, 31-41 215.29 215.29 ? RWK-Pliocene? A. ingens Subzone a 1.3-1.8      
                   
177-1089B-                  
2H-CC, 10-15 13.67 13.67 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18 Omega/B. aquilonalis 0-0.46  
3H-CC, 8-16 23.12 23.12 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
4H-CC, 12-17 32.42 32.42 NN21 0-0.26 T. lentiginosa Subzone b 0.18-0.42      
5H-3, 30-30 36.60 36.60 ? ?          
5H-3, 130-130 37.10 37.10 NN20 >0.26? dissolved          
                   
5H-CC, 16-21 41.90 41.90 NN20 0.26-0.46 T. lentiginosa Subzone b 0.18-0.42      
6H-CC, 11-16 51.18 51.18 NN20 0.26-0.46 T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
7H-CC, 8-14 60.73 60.73 NN20 0.26-0.46 T. lentiginosa Subzone a 0.42-0.65 ? >0.46  
8H-1, 120-120 63.00 63.00 NN20 >0.46 reworking          
8H-2, 30-30 63.60 63.60 NN19 >0.46 reworking          
                   
8H-CC, 20-25 70.02 70.02 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
9H-CC, 15-20 80.24 80.24 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
10H-CC, 15-20 88.25 88.25 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07 ? >0.46  
11H-CC, 9-14 99.09 99.09 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
12H-CC, 8-13 108.43 108.43 NN19 0.46-0.88? A. ingens Subzone c 0.65-1.07      
13H-4, 30-30 114.40 114.40 NN19 >0.88          
13H-4, 130-130 115.10 115.10 NN19 >0.88          
13H-CC, 0-8 117.90 117.90 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
14H-CC, 14-19 127.14 127.14 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07 ? >0.46  
15H-CC, 0-5 136.68 136.68 NN19 <0.96 A. ingens Subzone c 0.65-1.07      
                   
16H-5, 130-130 145.10 145.10 NN19 <0.96          
16H-6, 30-30 145.60 145.60 NN19 <0.96          
16H-CC, 12-17 146.40 146.40 NN19 <0.96 A. ingens Subzone c 0.65-1.07      
17H-2, 120-120 150.00 161.26 NN19 0.96-1.08          
17H-4, 120-120 153.00 153.00 NN19 <1.08          
                   
17H-5, 30-30 153.60 153.60 NN19 >1.08          
17H-CC, 18-23 155.28 155.28 NN19 >1.08 A. ingens Subzone b 1.07-1.3      
18H-CC, 13-18 165.39 165.39 NN19 1.08-1.24 A. ingens Subzone b 1.07-1.3 ? >0.46  
19H-5, 120-120 173.50 185.34 NN19 >1.24          
19H-CC, 16-21 175.33 175.33   Barren A. ingens Subzone b 1.07-1.3      
                   
20H-6, 30-30 183.60 183.60 NN19 <1.46          
20H-CC, 0-10 185.15 185.15   Barren A. ingens Subzone b 1.07-1.3      
21H-CC, 11-16 194.21 194.21 NN19 >1.46? (~barren) A. ingens Subzone a 1.3-1.8      
22H-2, 130-130 197.60 197.60 NN19 >1.46          
22H-CC, 0-5 204.30 204.30 NN19 Barren early A. ingens Subzone a 1.5-1.8 ? >0.46  
                   
23H-1, 30-30 204.60 204.60 NN19 <1.69          
23H-2, 30-30 206.10 206.10 NN19 >1.69          
23H-CC, 0-8 213.65 213.65   Barren early A. ingens Subzone a 1.5-1.8      
24H-CC, 23-28 223.43 223.43 NN18 >1.95 P. barboi 1.8-2.0      
25H-CC, 14-19 232.78 232.78 NN18 >1.95 T. kolbei/F.matuyama 2.0-2.5      
                   
26H-CC, 11-16 242.01 242.01   Barren T. kolbei/F.matuyama 2.0-2.5 ? >0.46  
27H-CC, 45-53 250.79 250.79   Barren T. kolbei/F.matuyama 2.0-2.5      
28H-CC, 25-30 257.84 257.84   Barren ?T. kolbei/F.matuyama 2.0-2.5     No age-indicative diatom taxa
29H-CC, 62-67 264.91 264.91   Barren ?T. kolbei/F.matuyama 2.0-2.5 ? close to 2.61 No age-indicative diatom taxa
                   
177-1089C-                  
1H-CC, 8-13 2.38 2.38 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
2H-CC, 0-8 9.37 9.37 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
3H-1, 110-110 15.00 15.00 NN21   T. lentiginosa Subzone c 0-0.18     Warm-water diatom assemblage: MIS 5.1
3H-CC, 9-14 17.42 17.42 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18 Omega/B. aquilonalis 0-0.46  
4H-1, 10-10 23.50 23.50 NN21   T. lentiginosa Subzone c 0-0.18     Warm-water diatom assemblage: MIS 5.5
                   
4H-3, 10-10 26.50 26.50 NN21   T. lentiginosa Subzone b 0.18-0.42     Cold-water diatom assemblage: MIS 6
4H-5, 90-90 30.30 30.30 NN21   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 7
4H-CC, 10-15 31.78 31.78 NN21 <0.26? T. lentiginosa Subzone b 0.18-0.42      
5H-1, 10-10 33.00 33.00 ?   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 7
5H-1, 90-90 33.80 33.80     T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 7
                   
5H-3, 10-10 36.00 36.00     T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 7
5H-CC, 10-15 40.91 40.91 NN20 0.26-0.46 T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
6H-2, 10-10 44.00 44.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 9
6H-3, 60-60 46.00 46.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 9
6H-4, 10-10 47.00 47.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 9
                   
6H-CC, 9-14 51.46 51.46 NN20 0.26-0.46 T. lentiginosa Subzone b 0.18-0.42 ? >0.46  
7H-1, 10-10 52.00 52.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 11
7H-2, 60-60 54.00 54.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 11
7H-3, 110-110 56.00 56.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 11
7H-5, 10-10 58.00 58.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 11
7H-6, 60-60 60.00 60.00 NN20   T. lentiginosa Subzone b 0.18-0.42     Warm-water diatom assemblage: MIS 11
7H-CC, 0-10 60.81 60.81 NN20 0.26-0.46 T. lentiginosa Subzone a 0.42-0.65 ? >0.46  
8H-CC, 0-10 70.34 70.34 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
9H-5, 121-121 78.00 78.00 NN19   T. lentiginosa Subzone a 0.42-0.65     Warm-water diatom assemblage
9H-7, 60-60 80.00 80.00 NN19   T. lentiginosa Subzone a 0.42-0.65      
9H-CC, 7-12 80.10 80.10 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
                   
10H-2, 10-10 82.00 82.00 NN19   T. lentiginosa Subzone a 0.42-0.65     Cold-water diatom assemblage: MIS 16
10H-3, 60-60 84.00 84.00 NN19   A. ingens Subzone c 0.65-1.07     Cold-water diatom assemblage: MIS 16
10H-4, 110-110 86.00 86.00 NN19   A. ingens Subzone c 0.65-1.07     Warm-water diatom assemblage: MIS 17
10H-CC, 5-5 88.04 88.04 NN19   A. ingens Subzone c 0.65-1.07     Warm-water diatom assemblage: MIS 17
10H-CC, 18-23 88.08 88.08 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
                   
11H-CC, 13-18 99.16 99.16 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07 ? >0.46  
12H-CC, 10-15 107.43 107.43 NN19 <0.88 A. ingens Subzone c 0.65-1.07      
13H-CC, 0-10 117.42 117.42 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
14H-CC, 9-14 126.55 126.55 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07      
15H-CC, 21-26 135.76 135.76 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07 ? >0.46  
                   
16H-CC, 10-15 146.80 146.80 NN19 0.96-1.08 A. ingens Subzone c 0.65-1.07      
17H-CC, 11-16 156.33 156.33 NN19 1.08-1.24 A. ingens Subzone b 1.07-1.3      
18H-CC, 0-3 165.57 165.57 NN19 1.08-1.24 A. ingens Subzone b 1.07-1.3      
19H-CC, 22-27 169.56 169.56 NN19 Barren A. ingens Subzone b 1.07-1.3 ? >0.46  
20H-CC, 46-51 184.01 184.01 NN19 1.24-1.46 A. ingens Subzone b 1.07-1.3      
                   
21H-CC, 19-24 190.84 190.84 NN19 1.24-1.46 A. ingens Subzone b 1.3-1.8 ? >0.46  
20H-CC, 46-51 184.01 184.01 NN19 1.24-1.46 A. ingens Subzone b 1.07-1.3      
21H-CC, 19-24 190.84 190.84 NN19 1.24-1.46 A. ingens Subzone a 1.3-1.8 ? >0.46  
                   
177-1089D-                  
1H-CC, 5-13 6.62 6.62 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18 Omega/B. aquilonalis 0-0.46  
2H-CC, 8-13 15.29 15.29 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
3H-CC, 7-12 22.51 22.51 NN21 0-0.26 T. lentiginosa Subzone c 0-0.18      
4H-CC, 0-10 32.56 32.56   Barren T. lentiginosa Subzone b 0.18-0.42      
5H-CC, 0-5 42.07 42.07 NN20 0.26-046 T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
                   
6H-CC, 24-29 51.42 51.42 NN20 0.26-046? T. lentiginosa Subzone b 0.18-0.42 Omega/B. aquilonalis 0-0.46  
7H-CC, 0-10 61.06 61.06 NN20 0.26-046? T. lentiginosa Subzone a 0.42-0.65   >0.46  
8H-CC, 5-10 70.72 70.72 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65      
9H-CC, 0-10 79.70 79.70 NN19 0.46-0.88 T. lentiginosa Subzone a 0.42-0.65 ? >0.46  
10H-CC, 0-5 89.72 89.72 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
                   
11H-CC, 0-10 98.00 98.00 NN19 0.46-0.88 A. ingens Subzone c 0.65-1.07      
12H-CC, 13-18 108.44 108.44 NN19 disolved A. ingens Subzone c 0.65-1.07      
13H-CC, 0-5 118.07 118.07 NN19 0.88-0.96 A. ingens Subzone c 0.65-1.07 ? >0.46  

Notes: MIS = marine isotopic stage; RWK = reworking. This table is also available in ASCII format in the TABLES directory.

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