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Table T9. Diatom datums, Site U1338. (See table note.)

Core, section, interval (cm) Marker species Age
(Ma)
Depth CSF (m)
Top Base Top Bottom Mean
321-U1338A- 321-U1338A-
1H-1, 98–100 1H-CC T Nitzschia fossilis 0.92 0.98 2.55 1.77
2H-CC 3H-1, 90 B Azpeitia barronii 1.62 9.89 12.45 11.17
3H-1, 90 3H-2, 65–66 B Fragilariopsis doliolus 1.88 12.45 13.10 12.78
3H-CC 4H-1, 50 T Rhizosolenia praebergonii 1.92 21.98 22.50 22.24
4H-4, 30–31 4H-CC T Nitzschia jouseae 2.71 26.50 31.45 28.98
5H-CC 6H-1, 40 B Rhizosolenia praebergonii 3.13 41.25 44.95 43.10
7H-2, 50–51 7H-3, 55 T Actinocyclus ellipticus f. lanceolata 3.35 52.20 53.75 52.98
9H-5, 70 9H-6, 110–111 T Fragilariopsis cylindrica 4.69 75.90 77.80 76.85
9H-6, 110–111 9H-CC B Nitzschia jouseae 4.92 77.80 78.78 78.29
10H-6, 129–130 10H-3, 58–59 B Thalassiosira oestrupii 5.70 82.28 87.49 84.89
11H-5, 57–58 11-CC T Thalassiosira praeconvexa 6.56 94.77 96.96 95.87
14H-2, 40–41 14H-4, 38–39 B Thalassiosira convexa 6.86 118.50 121.58 120.04
14H-4, 38–39 14H-CC B Thalassiosira praeconvexa 7.07 121.58 126.57 124.08
16H-CC 17H-1, 95 B Nitzschia miocenica 7.58 145.45 146.15 145.80
17H-4, 26–27 17H-4, 55 T Rossiella paleacea 7.64 149.96 150.20 150.08
18H-3, 65 18H-4, 72–73 T Thalassiosira burckliana 7.86 157.98 159.92 158.95
19H-5, 70 19H-6, 70 T Thalassiosira yabei 8.44 170.90 172.40 171.65
20H-6, 80 20H-CC B Nitzschia cylindrica 8.44 181.80 183.47 182.64
21H-2, 36–37 21H-5, 56–57 B Azpeitia nodulifera var. cyclopa 8.58 185.10 189.80 187.45
23H-5, 126–127 23H-CC B Actinocyclus ellipticus f. lanceolata 9.90 209.46 211.90 210.68
26H-6, 117 27X-2, 5–6 B Hemidiscus cuneiformis 11.24 239.37 241.75 240.56
27X-CC 28X-CC B Thalassiosira brunii 11.50 247.54 249.80 248.67
29X-CC 30X-CC T Cestodiscus pulchellus 12.05 268.15 269.00 268.58
30X-CC 31X-CC B Nitzschia porteri 12.11 269.00 278.50 273.75
31X-CC 32X-CC T Crucidenticula nicobarica 12.50 278.50 288.90 283.70
32X-CC 32X-2, 86–87 T Coscinodiscus lewisianus 12.99 288.90 290.46 289.68
33X-4, 80 33X-5, 72–73 B Triceratium cinnamomeum 13.52 303.00 304.42 303.71
35X-2, 80 35X-CC B Actinocyclus ellipticus 14.37 317.81 319.79 318.80
37X-1, 43–44 37X-CC B Thalassiosira tappanae 14.55 336.43 337.18 336.81
40X-1, 122–123 40X-3, 27–28 B Actinocyclus ingens 15.25 365.55 367.16 366.36
42X-CC 43X-2, 70–71 T Thalassiosira fraga 15.96 391.07 395.40 393.24

Note: T = top, B = bottom.

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