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Table T8. Paleomagnetic age datums, Site C0018.
|
Datum
|
Boundary
age (Ma)
|
Upper
|
Lower
|
Average depth (mbsf)
|
Note
|
|
Core, section, interval (cm)
|
Depth
(mbsf)
|
Core, section, interval (cm)
|
Depth
(mbsf)
|
|
Magnetic
|
333-C0018A-
|
333-C0018A-
|
|
|
|
Emperor
|
0.42
|
8H-2, 14
|
64.01
|
8H-2, 14
|
64.01
|
64.01
|
Uncertain
|
|
Brunhes/Matuyama
|
0.78
|
14H-3, 18
|
119.93
|
14H-7, 93
|
125.02
|
122.47
|
|
|
Jaramillo (bottom)
|
1.07
|
24T-1, 1
|
190.66
|
24T-5, 59
|
195.74
|
193.20
|
|
|
Cobb Mountain (top)
|
1.21
|
25T-2, 28
|
[201.84]
|
27T-3, 3
|
220.96
|
|
Upper uncertain because of no recovery in Core 333-C0018A-26T
|
|
Cobb Mountain (bottom)
|
1.24
|
28T-1, 25
|
228.90
|
28T-2, 20
|
230.26
|
229.58
|
|
|
Tephra
|
|
Azuki volcanic ash bed
|
0.85
|
14H-8, 14.5
|
125.65
|
14H-CC, 11
|
126.55
|
126.18
|
|
|
Pink volcanic ash bed
|
1.05
|
23H-1, 68.5
|
188.57
|
23H-CC, 6.5
|
190.51
|
189.68
|
|
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