Initial Reports, Volume 201 Shipboard Scientific Party Chapter 10, Table T4. Hydrogen concentrations, Holes 1229A and 1229D. Core, section, interval (cm) Depth (mbsf) Hydrogen (nM) Incubation temperature (degrees C) 201-1229A- 2H-2, 103-109 7.43 0.22 11 2H-5, 60-66 11.5 0.21 11 3H-2, 84-90 16.74 0.23 11 3H-5, 40-46 20.8 0.15 11 4H-2, 60-66 26 0.6 11 4H-5, 79-85 30.69 1.1 11 5H-5, 65-71 40.05 1.86 11 6H-2, 119-125 42.59 0.51 11 8H-2, 60-66 61 0.45 11 8H-5, 60-66 65.5 0.3 11 9H-2, 74-80 70.64 0.26 11 9H-5, 40-46 74.8 0.48 11 10H-2, 75-81 81.65 0.21 11 10H-4, 40-46 84.3 0.16 11 11H-2, 29-35 90.69 0.14 11 11H-5, 40-46 95.3 0.11 11 12H-3, 85-91 102.25 0.28 11 14H-3, 80-86 121.2 0.37 11 18H-2, 90-96 157.8 0.16 11 22H-1, 80-86 185.7 0.13 11 201-1229D- 1H-1, 150-156 1.5 0.13 11 1H-2, 65-71 2.65 0.38 11 1H-3, 55-61 4.05 0.31 11 1H-5, 10-16 6.1 0.88 11 4H-3, 95-101 29.75 0.12 11 4H-4, 33-39 30.63 0.12 11 4H-5, 72-78 32.52 0.14 11 7H-1, 52-58 49.82 4.05 11 7H-4, 18-24 53.98 0.53 12H-3, 89-95 87.19 0.28 13H-2, 52-58 89.32 0.96