Table T16. Polarity boundaries, Site U1423.
| Core, section, interval (cm) | Polarity boundary | Age (Ma) |
Depth CSF-A (m) | Depth CCSF-D (m) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Top | Bottom | Top | Bottom | Midpoint | ± | Top | Bottom | Midpoint | ± | ||
| 346-U1423A- | 346-U1423A- | ||||||||||
| 6H-5, ~45 | 6H-6, ~55 | (B) C1n (Brunhes/Matuyama) | 0.781 | 51.70 | 53.30 | 52.50 | 0.80 | 54.09 | 55.69 | 54.89 | 0.80 |
| 7H-2, ~10 | 7H-3, ~40 | (T) C1r.1n (Jaramillo) | 0.988 | 56.40 | 58.20 | 57.30 | 0.90 | 59.40 | 61.20 | 60.30 | 0.90 |
| 7H-5, ~20 | 7H-5, ~60 | (B) C1r.1n (Jaramillo) | 1.072 | 61.00 | 61.40 | 61.20 | 0.20 | 64.00 | 64.40 | 64.20 | 0.20 |
| 8H-7, ~45 | 9H-2, ~105 | (T) C2n (Olduvai) | 1.778 | 73.76 | 76.36 | 75.06 | 1.30 | 77.60 | 80.20 | 78.90 | 1.30 |
| 11H-2, ~130 | 11H-2, ~20 | (B) C2n (Olduvai) | 1.945 | 93.40 | 95.60 | 94.50 | 1.10 | 97.89 | 100.09 | 98.99 | 1.10 |
| 13H-1, ~80 | 13H-1, ~20 | (B) C2r (Matuyama/Gauss) | 2.581 | 111.40 | 112.60 | 112.00 | 0.60 | 116.30 | 117.50 | 116.90 | 0.60 |
| 346-U1423B- | 346-U1423B- | ||||||||||
| 7H-1, ~10 | 7H-1, ~50 | (B) C1n (Brunhes/Matuyama) | 0.781 | 51.30 | 52.10 | 51.70 | 0.40 | 53.40 | 54.20 | 53.80 | 0.40 |
| 7H-5, ~130 | 7H-5, ~80 | (T) C1r.1n (Jaramillo) | 0.988 | 57.90 | 58.90 | 58.40 | 0.50 | 60.00 | 61.00 | 60.50 | 0.50 |
| 8H-1, ~150 | 8H-1, ~120 | (B) C1r.1n (Jaramillo) | 1.072 | 62.00 | 62.60 | 62.30 | 0.30 | 64.29 | 64.89 | 64.59 | 0.30 |
| 9H-4, ~110 | 9H-4, ~90 | (T) C2n (Olduvai) | 1.778 | 75.80 | 76.20 | 76.00 | 0.20 | 78.61 | 79.01 | 78.81 | 0.20 |
| — | — | (B) C2n (Olduvai) | — | — | — | — | — | — | — | — | — |
| 13H-4, ~150 | 13H-4, ~50 | (B) C2r (Matuyama/Gauss) | 2.581 | 112.60 | 114.60 | 113.60 | 1.00 | 117.80 | 119.80 | 118.80 | 1.00 |
Bold = boundaries that are relatively well defined. B = Bottom, T = top. — = not observed.
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