Table 2 Polarity boundaries identified in collected u-channel samples from Holes U1424A and U1424B
Polarity boundaries | Age (Ma) | Hole-core-section | Center position (cm) | Uncertainty (cm) | Depth CSF-A (m) | Depth CCSF-A (m) |
|---|---|---|---|---|---|---|
(B) C1n (Brunhes/Matuyama) | 0.781 | B-4H-2 | 112 | ± 5 | 24.32 | 27.54 |
(T) C1r.1n (Jaramillo) | 0.988 | A-4H-4 | 132 | ± 8 | 31.62 | 34.92 |
(B) C1r.1n (Jaramillo) | 1.072 | A-4H-6 | 96 | ± 19 | 34.26 | 37.56 |
|  |  | B-5H-3 | 52 | ± 18 | 34.18 | 37.58 |
(T) C1r.2n (Cobb Mountain) | 1.173 | B-5H-5 | 54 | ± 5 | 37.20 | 40.60 |
(B) C1r.2n (Cobb Mountain) | 1.185 | B-5H-5 | 76 | ± 5 | 37.42 | 40.82 |
(T) C2n (Olduvai) | 1.778 | B-7H-3 | 126 | ± 5 | 54.46 | 59.69 |
(B) C2n (Olduvai) | 1.945 | B-7H-6 | 98 | ± 5 | 58.68 | 63.91 |
(T) C2r.1n (Reunion) | 2.128 | A-7H-6 | 103 | ± 7 | 62.83 | 67.96 |
|  |  | B-8H-2 | 67 | ± 10 | 61.87 | 67.93 |
(B) C2r.1n (Reunion) | 2.148 | A-7H-6 | 137 | ± 7 | 63.17 | 68.30 |
|  |  | B-8H-2 | 118 | ± 10 | 62.38 | 68.44 |
(T) C2An.1n (Matuyama/Gauss) | 2.581 | B-9H-4 | 100 | ± 12 | 74.66 | 81.30 |
(T) C2An.1r (Kaena) | 3.032 | A-10H-5 | 115 | ± 15 | 89.95 | 95.81 |
(B) C2An.1r (Kaena) | 3.116 | B-11H-2 | 110 | ± 10 | 90.80 | 98.44 |
(T) C2An.2r (Mammoth) | 3.207 | A-11H-3 | 67 | ± 20 | 95.35 | 101.87 |
|  |  | B-11H-5 | 7 | ± 5 | 94.27 | 101.91 |
(B) C2An.2r (Mammoth) | 3.33 | A-11H-5 | 50 | ± 25 | 98.18 | 104.70 |
(T) C2Ar (Gauss/Gilbert) | 3.596 | A-12H-6 | 26 | ± 5 | 109.62 | 115.67 |
|  |  | B-13H-2 | 8 | ± 5 | 107.51 | 115.64 |
(T) C3n.1n (Cochiti) | 4.187 | A-16H-1 | 110 | ± 5 | 140.90 | 149.06 |
|  |  | B-16H-5 | 45 | ± 15 | 142.15 | 149.10 |
(B) C3n.1n (Cochiti) | 4.3 | A-16H-5 | 33 | ± 20 | 146.05 | 154.21 |
(T) C3n.2n (Nunivak) | 4.493 | B-17H-5 | 55 | ± 10 | 151.75 | 159.34 |
(B) C3n.2n (Nunivak) | 4.631 | A-17H-3 | 92 | ± 25 | 153.22 | 162.10 |
(T) C3n.3n (Sidufjall) | 4.799 | A-17H-5 | 150 | ± 20 | 156.80 | 165.68 |