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Table T8. Paleomagnetic age datums, Site C0011.
|
Datum
|
Boundary
age (Ma)
|
Upper
|
Lower
|
Average
depth
(mbsf)
|
Note
|
Core, section,
interval (cm)
|
Depth (mbsf)
|
Core, section,
interval (cm)
|
Depth (mbsf)
|
|
Magnetic
|
|
333-C0011C-
|
333-C0011C-
|
|
|
|
Brunhes/Matuyama
|
0.781
|
3H-5, 17.5–19.5
|
16.97
|
3H-5, 78–80
|
17.75
|
17.36
|
|
|
|
|
333-C0011D-
|
333-C0011D-
|
|
|
|
Jaramillo top
|
0.988
|
1H-7, 85–87
|
27.51
|
1H-8, 25.5–27.5
|
28.08
|
27.80
|
|
|
Jaramillo base
|
1.072
|
2H-2, 9.5–11.5
|
31.95
|
2H-2, 28–30
|
32.13
|
32.04
|
|
|
Cobb Mountain
|
1.173–1.185
|
|
|
|
|
|
|
|
Olduvai top
|
1.778
|
5H-2, 19–21
|
57.02
|
5H-2, 85–87
|
57.66
|
57.34
|
|
|
Olduvai base
|
1.945
|
5H-6, 99–101
|
61.85
|
5H-7, 79–81
|
63.01
|
62.43
|
|
|
Matuyama/Gauss
|
2.581
|
7H-2, 84–86
|
75.55
|
7H-3, 18–20
|
75.90
|
75.72
|
|
|
Keana top
|
3.032
|
9H-2, 89–91
|
83.74
|
9H-5, 39–41
|
85.78
|
84.76
|
|
|
Keana base
|
3.116
|
9H-7, 87–89
|
88.98
|
9H-8, 20–22
|
89.52
|
89.25
|
|
|
Mammoth top
|
3.207
|
10H-4, 28–30
|
94.75
|
10H-6, 26–28
|
96.07
|
95.41
|
|
|
Mammoth base
|
3.33
|
11H-3, 22–24
|
102.98
|
11H-6, 59.5–61.5
|
104.96
|
103.97
|
|
|
Gauss/Gilbert
|
3.596
|
14H-2, 18–20
|
126.38
|
14H-2, 96–98
|
127.06
|
126.72
|
|
|
Cochiti top
|
4.187
|
19H-6, 90–92
|
173.36
|
20H-3, 55–57
|
177.22
|
175.29
|
|
|
Cochiti base
|
4.3
|
23T-2, 18–20
|
187.59
|
25T-1, 15–17
|
197.78
|
192.68
|
Relatively large error due to lack of data
|
|
Nunivak top
|
4.493
|
26X-4, 91–93
|
207.44
|
26X-6, 133–135
|
209.19
|
208.32
|
|
|
Nunivak base
|
4.631
|
27X-5, 94–96
|
213.91
|
27X-CC, 2.5–4.5
|
214.79
|
214.35
|
|
|
Sidufjall top
|
4.799
|
28X-4, 74–76
|
219.60
|
29X-2, 81–83
|
221.89
|
220.74
|
|
|
Sidufjall base
|
4.896
|
30X-2, 40–42
|
226.80
|
30X-3, 127–129
|
228.90
|
227.85
|
Uncertain because of lack of data in the bottom
|
|
Thvera top
|
4.997
|
30X-3, 127–129
|
228.90
|
31X-1, 58–60
|
235.08
|
231.99
|
Uncertain because of lack of data in the top
|
|
Thvera base
|
5.235
|
33X-1, 94–96
|
247.37
|
33X-2, 85–87
|
248.57
|
247.97
|
|
|
Gilbert/C3An.1n
|
6.033
|
37X-7, 22
|
281.78
|
38X-1, 132
|
283.82
|
282.80
|
|
|
C3An.1n/C3An.1r
|
6.252
|
39X-3, 49
|
295.16
|
39X-4, 62
|
296.63
|
295.90
|
|
|
C3An.1r/C3An.2n
|
6.436
|
40X-8, 22
|
309.53
|
41X-1, 86
|
311.86
|
310.70
|
|
|
C3An.2n/C3Ar
|
6.733
|
41X-7, 135.5
|
319.54
|
42X-1, 84
|
320.80
|
320.17
|
|
|
C3Ar/C3Bn
|
7.14
|
42X-7, 24
|
327.31
|
43X-4, 132
|
333.19
|
330.25
|
|
|
C3Bn/C3Br.1r
|
7.212
|
|
|
|
|
|
|
|
C3Br.1r/C3Br.1n
|
7.251
|
|
|
|
|
|
|
|
C3Br.1n/C3Br.2r
|
7.285
|
|
|
|
|
|
|
|
C3Br.2r/C3Br.2n
|
7.454
|
|
|
|
|
|
|
|
C3Br.2n/C3Br.3r
|
7.489
|
|
|
|
|
|
|
|
C3Br.3r/C4n.1n
|
7.528
|
|
|
|
|
|
|
|
C4n.1n/C4n.1r
|
7.642
|
|
|
|
|
|
|
|
C4n.1r/C4n.2n
|
7.695
|
|
|
|
|
|
|
|
Tephra
|
|
333-C0011C-
|
333-C0011C-
|
|
|
|
Azuki volcanic ash bed
|
0.85
|
3H-10, 10
|
21.10
|
3H-10, 27
|
21.26
|
21.18
|
|
|
|
|
333-C0011D-
|
333-C0011D-
|
|
|
|
Pink volcanic ash bed
|
1.05
|
2H-1, 86
|
31.34
|
2H-1, 89
|
31.37
|
31.35
|
|
|
Habutaki I volcanic ash bed
|
2.9
|
8H-2, 80
|
79.64
|
8H-CC, 8.5
|
81.48
|
80.56
|
Lower part is flow-in
|
|
Ohta volcanic ash bed
|
3.9
|
17H-9, 2
|
157.25
|
17H-9, 5
|
157.28
|
157.26
|
|
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