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Table T18. Headspace (HS) gas concentrations, Site U1429.

Core, section,
interval (cm)
Top depth
CSF-A (m)
Sample
type
Sediment
volume
(cm3)
CH4
(ppmv)
measured
CH4
(ppmv)
normalized
346-U1429A-
1H-2, 0–5 1.5 HS 3 0 0.00
2H-2, 0–5 7.9 HS 3 1.76 2.93
3H-2, 0–5 17.4 HS 3.6 0 0.00
4H-2, 0–5 26.9 HS 3.4 2.41 3.54
5H-2, 0–5 36.4 HS 3 5.2 8.67
6H-2, 0–5 45.9 HS 3.4 1,937.78 2,849.68
7H-2, 0–5 53.1 HS 3 6,837.98 11,396.63
8H-2, 0–5 62.56 HS 3 13,488.71 22,481.18
9H-2, 0–5 72.1 HS 3 8,794.02 14,656.70
10H-2, 0–5 81.6 HS 3 10,635.06 17,725.10
11H-2, 0–5 91.1 HS 3 11,254.57 18,757.62
12H-2, 0–5 100.6 HS 3 10,828.38 18,047.30
13H-2, 0–5 110.1 HS 3.1 7,135.92 11,509.55
15H-2, 0–5 119.6 HS 2.9 5,065.31 8,733.29
15H-5, 0–5 124.1 HS 3.1 6,149.63 9,918.76
16H-2, 0–5 129.11 HS 3.1 4,400.85 7,098.15
17H-2, 0–5 138.58 HS 3.2 5,743.78 8,974.66
18H-2, 0–5 148.1 HS 3 10,463.75 17,439.58
21H-2, 0–5 167.1 HS 3 7,150.06 11,916.77
22H-2, 0–5 176.59 HS 3 2,530.25 4,217.08
23H-4, 93–98 188.18 HS 3 3,718.59 6,197.65

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