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Table T19. Polarity boundary, Site U1426.

Core, section, interval (cm)
 Polarity boundaries		 Age
(Ma)		 Depth CSF-A (m) Depth CCSF-D (m)
Top Bottom Top Bottom Midpoint ± Top Bottom Midpoint ±
346-U1426A- 346-U1426A-  
10H-3, ~87 10H-4, ~50 (B) C1n (Brunhes/Matuyama) 0.781 81.2 82.2 81.7 0.5 86.86 87.86 87.36 0.5
10H-6, ~115 10H-7, ~95 (T) C1r.1n (Jaramillo) 0.988 85.34 86.54 85.94 0.6 91.00 92.20 91.60 0.6
11H-8, ~50 12H-3, ~60 (B) C1r.1n (Jaramillo) 1.072 97.7 99.3 98.5 0.8 107.29 108.89 108.09 0.8
19H-5, ~70 19H-5, ~90 (T) C2n (Olduvai) 1.778 168.95 169.95 169.45 0.5 190.70 191.70 191.20 0.5
21H-7, ~45 22H-2, ~75 (B) C2n (Olduvai) 1.945 189.6 193.6 191.6 2 214.57 218.57 216.57 2
28H-6, ~10 28H-7, ~60 (T) C2An.1n (Matuyama/Gauss) 2.581 253.6 255.6 254.6 1 279.34 281.34 280.34 1
346-U1426C- 346-U1426C-  
9H-6, ~60 10H-2, ~85 (B) C1n (Brunhes/Matuyama) 0.781 71.9 80.9 76.4 4.5 77.66 86.66 82.16 4.5
10H-8, ~40 11H-2, ~80 (T) C1r.1n (Jaramillo) 0.988 84 86 85 1 91.42 93.42 92.42 1
12H-4, ~65 12H-5, ~75 (B) C1r.1n (Jaramillo) 1.072 98.6 100.2 99.4 0.8 107.70 109.30 108.50 0.8
21H-1, ~80 21H-2, ~110 (T) C2n (Olduvai) 1.778 168.8 172.2 170.5 1.7 190.57 193.97 192.27 1.7
23H-2, ~120 23H-4, ~25 (B) C2n (Olduvai) 1.945 188.6 190.6 189.6 1 213.03 215.03 214.03 1
346-U1426D- 346-U1426D-  
9H-8, ~40 10H-2, ~20 (B) C1n (Brunhes/Matuyama) 0.781 80 81.8 80.9 0.9 85.65 87.45 86.55 0.9
10H-5, ~25 10H-5, ~85 (T) C1r.1n (Jaramillo) 0.988 85.8 86.4 86.1 0.3 91.45 92.05 91.75 0.3

Bold = boundaries that are relatively well defined. B = bottom, T= top.

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