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Table T6. Paleomagnetic age datums, Site C0012.
|
Datum
|
Boundary
age (Ma)
|
Upper
|
Lower
|
Average depth (mbsf)
|
|
Core, section, interval (cm)
|
Depth (mbsf)
|
Core, section, interval (cm)
|
Depth (mbsf)
|
|
Magnetic
|
|
333-C0012C-
|
333-C0012C-
|
|
|
Brunhes/Matuyama
|
0.78
|
2H-1, 27
|
4.76
|
2H-1, 87
|
5.32
|
5.04
|
|
Jaramillo top
|
0.99
|
2H-2, 38
|
6.20
|
2H-2, 88
|
6.67
|
6.43
|
|
Jaramillo base
|
1.07
|
2H-4, 22
|
8.70
|
2H-4, 90
|
9.34
|
9.02
|
|
Cobb Mountain
|
1.173–1.185
|
|
|
|
|
|
|
Olduvai top
|
1.78
|
|
|
|
|
|
|
Olduvai base
|
1.95
|
|
|
|
|
|
|
Matuyama/Gauss
|
2.85
|
|
|
|
|
|
|
Keana top
|
3.03
|
|
|
|
|
|
|
Keana base
|
3.12
|
|
|
|
|
|
|
Mammoth top
|
3.21
|
|
|
|
|
|
|
Mammoth base
|
3.33
|
|
|
|
|
|
|
Gauss/Gilbert
|
3.60
|
3H-3, 88
|
17.47
|
3H-4, 88
|
18.81
|
18.14
|
|
Cochiti top
|
4.19
|
7H-2, 35
|
53.52
|
7H-5, 55
|
56.38
|
54.95
|
|
Cochiti base
|
4.30
|
8H-3, 10
|
62.73
|
8H-3, 112
|
63.68
|
63.20
|
|
Nunivak top
|
4.49
|
9H-6, 90
|
76.36
|
9H-7, 90
|
77.80
|
77.08
|
|
Nunivak base
|
4.63
|
|
|
|
|
|
|
Sidufjall top
|
4.80
|
|
|
|
|
|
|
Sidufjall base
|
4.90
|
|
|
|
|
|
|
Thvera top
|
5.00
|
|
|
|
|
|
|
Thvera base
|
5.24
|
10H-9, 10
|
85.16
|
11H-1, 19
|
86.68
|
85.92
|
|
Gilbert/C3An.1n
|
6.03
|
13H-1, 19
|
102.19
|
13H-1, 91
|
102.91
|
102.55
|
|
C3An.1n/C3An.1r
|
6.25
|
14H-1, 30
|
108.27
|
14H-3, 25
|
108.80
|
108.53
|
|
C3An.1r/C3An.2n
|
6.44
|
14H-4, 96
|
110.17
|
14H-5, 20
|
110.76
|
110.46
|
|
C3An.2n/C3Ar
|
6.73
|
14H-7, 13
|
113.25
|
14H-7, 89
|
113.94
|
113.60
|
|
|
|
333-C0012D-
|
333-C0012D-
|
|
|
C3Ar/C3Bn
|
7.14
|
2H-7, 90
|
123.34
|
2H-8, 15
|
123.93
|
123.63
|
|
C3Bn/C3Br.1r
|
7.21
|
|
|
|
|
|
|
C3Br.1r/C3Br.1n
|
7.25
|
|
|
|
|
|
|
C3Br.1n/C3Br.2r
|
7.29
|
|
|
|
|
|
|
C3Br.2r/C3Br.2n
|
7.45
|
3H-4, 90.5
|
130.35
|
3H-4, 90.5
|
130.35
|
130.35
|
|
C3Br.2n/C3Br.3r
|
7.49
|
|
|
|
|
|
|
C3Br.3r/C4n.1n
|
7.53
|
|
|
|
|
|
|
C4n.1n/C4n.1r
|
7.64
|
4H-5, 67
|
138.11
|
4H-6, 20
|
138.90
|
138.51
|
|
C4n.1r/C4n.2n
|
7.70
|
5H-2, 30
|
142.71
|
5H-3, 48
|
144.31
|
143.51
|
|
C4n.2n/C4r.1r
|
8.11
|
11H-3, 31
|
172.52
|
11H-4, 67
|
173.67
|
173.09
|
|
Tephra
|
|
333-C0012C-
|
333-C0012C-
|
|
|
Azuki volcanic ash bed
|
0.85
|
2H-1, 118
|
5.61
|
2H-1, 132
|
5.75
|
5.68
|
|
Pink volcanic ash bed
|
1.05
|
2H-3, 40
|
7.54
|
2H-3, 73
|
7.85
|
7.70
|
|
Ohta volcanic ash bed
|
3.9
|
6H-2, 120
|
44.93
|
6H-2, 124.5
|
44.97
|
44.95
|
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