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Table 1 Depths (mbsf, mcd) and ages (Ma) of samples studied

From: Evolutionary prospection in the Neogene planktic foraminifer Globorotalia menardii and related forms from ODP Hole 925B (Ceara Rise, western tropical Atlantic): evidence for gradual evolution superimposed by long distance dispersal?

Sample Depth (mbsf) Depth (mcd) Age (Ma) δ18O event
ODP 154-925B-1-1, 0–2 cm 0.01 0.01 0.00 1.1
ODP 154-925B-1-1, 15–16 cm 0.16 0.16a 0.003 1.1
ODP 154-925B-1-3, 36.5–37.5 cm 3.36 3.36a 0.081 3.3
ODP 154-925B-1-3, 125–126 cm 4.25 4.25a 0.11 ca 5.5
ODP 154-925B-2-2, 135–136 cm 7.36 8.06a 0.202 7.1
ODP 154-925B-2-3, 76–77 cm 8.27 8.96–8.97a 0.225 7.3
ODP 154-925B-2-6, 37–38 cm 12.37 13.08a 0.334 9.1
ODP 154-925B-2-CC, 25–26 cm 14.03 15.84a 0.418 ca 11.3
ODP 154-925B-3-3, 67.5–68.5 cm 17.68 20.59 0.51  
ODP 154-925B-4-1, 17–18 cm 23.68 26.89 0.73  
ODP 154-925B-4-3, 74–75 cm 27.25 30.5–31.5a 0.856  
ODP 154-925B-5-1, 140–141 cm 34.41 38.35 1.12  
ODP 154-925B-5-6, 85–86 cm 41.36 45.1–45.5a 1.344  
ODP 154-925B-6-2, 89–90 cm 44.9 48.56 1.47  
ODP 154-925B-6-6, 3–4 cm 50.04 53.6–53.8a 1.645  
ODP 154-925B-6-CC, 10–11 cm 52.19 55.85 1.735  
ODP 154-925B-7-2, 62–63 cm 54.13 58.47 1.8  
ODP 154-925B-7-5, 71.5–72.5 cm 58.72 63.06 1.95  
ODP 154-925B-7-CC, 10–11 cm 61.68 66.02 2.057  
ODP 154-925B-8-3, 38–39 cm 64.89 68.8–69.2a 2.154  
ODP 154-925B-8-6, 13–14 cm 69.14 73.0–73.5a 2.266  
ODP 154-925B-8-6, 124–125 cm 70.25 74.36 2.3  
ODP 154-925B-9-5, 92.5–93.5 cm 77.93 83.26 2.594  
ODP 154-925B-10-4, 126.5–127.5 cm 86.27 92.06 2.88  
ODP 154-926A-11-2, 20–21 cm 91.2 103.25 3.25  
ODP 154-925B-11-4, 66–67 cm 95.17 104.44 3.2  
ODP 154-925B-12-1, 68–69 cm 100.19 110.34 3.39  
ODP 154-925B-13-5, 127–128 cm 116.27 128.34 3.99  
ODP 154-925B-14-2, 51–52 cm 120.51 132.85 4.14  
ODP 154-925B-14-6, 130–131 cm 127.31 139.65 4.35  
ODP 154-925B-15-3, 140–141 cm 132.4 145.71 4.62  
ODP 154-925B-15-6, 65–66 cm 136.15 149.46 4.77  
ODP 154-925B-16-3, 104–105 cm 141.54 156.36 5  
ODP 154-925B-16-CC, 15–16 cm 147.11 161.93 5.268  
ODP 154-925B-18-1, 57–58 cm 157.07 173.22 5.78  
ODP 154-925B-18-5, 106–107 cm 163.56 180.43 6.07  
ODP 154-925B-20-1, 020–021 cm 175.71 193.39 6.49  
ODP 154-925B-21-CC, 4–5 cm 194.93 216.22 7.195  
ODP 154-925B-23-4, 103–117 cm 209.64 234.15 7.96  
  1. The numerical ages from Site 925B follow the astronomically tuned age model of Bickert et al. (1997). The basis for the numerical age determination for sample 926A-11-2, 20–21 cm were the stratigraphic information given in the ODP Leg 154 Shipboard Scientific Party (1995) for Site 926 (Initial Reports, chapter 5, pp. 172, 182–183 and Tables 4 and 7 therein). The last column indicates interglacial warm δ18O events, within which additional samples were selected (the δ18O event nomenclature follows Table 1 in Farrell et al. 1995)
  2. aSamples were selected within peaks of warm interglacial periods following the benthic δ18 O (Cibicides wuellerstorfi) curve for Site 925 shown in Fig. 4 and Appendix I of Bickert et al. (1997). The necessary composite depth to mbsf conversion was using the respective information given in the site chapters of the Initial Report to Leg 154 (e.g. Table 4 on page 81 ff). In case of sample 925B-2-CC, 25–26 cm the average offset of 1.805 m (from 0.7 m for 2H-CC and 2.91 m for 3H-1) was applied