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?

Knappertsbusch, Michael

doi:10.1007/s13358-016-0113-6

Swiss Journal of Palaeontology

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	0.16^a	0.003	1.1
ODP 154-925B-1-3, 36.5–37.5 cm	3.36	3.36^a	0.081	3.3
ODP 154-925B-1-3, 125–126 cm	4.25	4.25^a	0.11	ca 5.5
ODP 154-925B-2-2, 135–136 cm	7.36	8.06^a	0.202	7.1
ODP 154-925B-2-3, 76–77 cm	8.27	8.96–8.97^a	0.225	7.3
ODP 154-925B-2-6, 37–38 cm	12.37	13.08^a	0.334	9.1
ODP 154-925B-2-CC, 25–26 cm	14.03	15.84^a	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	30.5–31.5^a	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	45.1–45.5^a	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	53.6–53.8^a	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	68.8–69.2^a	2.154
ODP 154-925B-8-6, 13–14 cm	69.14	73.0–73.5^a	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

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)
^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

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