Table T12. Polarity zonation, Holes U1307A and U1307B.
| Polarity chron interpretation |
Age (Ma) |
Interval | Hole U1307A | Hole U1307B | ||||
|---|---|---|---|---|---|---|---|---|
| Core, section, interval (cm) |
Depth (mbsf) |
Depth (mcd) |
Core, section, interval (cm) |
Depth (mbsf) |
Depth (mcd) |
|||
| 303-U1307A- | 303-U1307B- | |||||||
| C1n (b) Matuyama/Brunhes | 0.78 | Upper | 4H-2, 65 | 30.65 | 32.69 | 4H-4, 135 | 29.65 | 32.84 |
| Lower | 4H-2, 145 | 31.40 | 33.49 | 4H-5, 70 | 30.50 | 33.69 | ||
| C1r.1n (t) Jaramillo | 0.99 | Upper | 5H-2, 140 | 40.95 | 43.95 | 5H-5, 85 | 40.15 | 44.09 |
| Lower | 5H-3, 125 | 42.22 | 45.27 | 5H-6, 60 | 41.40 | 45.34 | ||
| C1r.1n (b) Jaramillo | 1.07 | Upper | 5H-6, 30‡ | 45.77 | 48.82 | 6H-1, 100‡ | 43.80 | 48.17 |
| Lower | 5H-7, 85 | 46.99 | 50.04 | 6H-2, 130 | 45.36 | 49.73 | ||
| (t) Cobb Mountain | 1.19* | Upper | 6H-5, 100 | 49.56 | 53.93 | |||
| Lower | 6H-6, 90 | 50.96 | 55.33 | |||||
| (b) Cobb Mountain | 1.215* | Upper | ||||||
| Lower | ||||||||
| C2n (t) Olduvai | 1.77 | Upper | 10H-3, 125 | 81.95 | 88.32 | 10H-3, 35 | 84.15 | 88.91 |
| Lower | 10H-5, 70 | 84.40 | 90.77 | 10H-4, 80 | 86.10 | 90.86 | ||
| C2n (b) Olduvai | 1.945 | Upper | 11H-6, 100 | 97.88 | 103.08 | |||
| Lower | 11H-7, 35 | 98.73 | 103.93 | |||||
| C2r.1n (t) Reunion | 2.115† | Upper | 12H-5, 45 | 103.15 | 110.83 | 12H-3, 140 | 104.20 | 110.62 |
| Lower | 12H-5, 75 | 103.45 | 111.13 | 12H-4, 40 | 104.70 | 111.12 | ||
| C2r.1n (b) Reunion | 2.153† | Upper | 12H-6, 60 | 104.80 | 112.48 | 12H-5, 10 | 105.90 | 112.32 |
| Lower | 12H-6, 85 | 105.05 | 112.73 | 12H-5, 45 | 106.25 | 112.67 | ||
| C2An.1n (t) Gauss/Matuyama | 2.581 | Upper | 14H-3, 40 | 115.80 | 123.71 | 13H-6, 25 | 117.05 | 123.58 |
| Lower | 14H-4, 15 | 117.05 | 124.10 | 13H-7, 25 | 118.55 | 125.08 | ||
| C2An.1n (b) | 3.04 | Upper | 17H-2, 55 | 137.25 | 145.11 | 15H-7, 60 | 137.90 | 146.15 |
| Lower | 17H-2, 100 | 137.75 | 145.56 | 16H-1, 95** | 138.75 | 148.07 | ||
| C2An.2n (t) | 3.11 | Upper | 17H-4, 55 | 140.25 | 148.11 | |||
| Lower | 17H-4, 90 | 140.60 | 148.46 | |||||
| C2An.2n (b) | 3.22 | Upper | 17H-5, 10 | 140.85 | 148.71 | |||
| Lower | 17H-4, 115 | 141.30 | 149.16 | |||||
| C2An.3n (t) | 3.33 | Upper | 18H-1, 80 | 145.50 | 153.89 | 16H-5, 50 | 144.30 | 153.62 |
| Lower | 18H-2, 115 | 147.38 | 155.77 | 16H-6, 100 | 146.30 | 155.62 | ||
| C2An.3n (b) Gauss/Gilbert | 3.58 | Upper | 19H-6, 60 | 161.20 | 171.81 | |||
| Lower | 19H-6, 135 | 161.95 | 172.56 | |||||
Notes: (b) = bottom, (t) = top. Ages follow Cande and Kent (1995) except where indicated. * = Channell et al., 2002. † = Channell et al., 2003. ‡ = truncated by sand. ** = core break.
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