Initial Reports, Volume 201 Shipboard Scientific Party Chapter 9, Table T4. Hydrogen concentrations, Holes 1228A and 1228E. Core, section, interval (cm) Depth (mbsf) Hydrogen (nM) Incubation temperature (degrees C) 201-1228A- 2H-2, 114-120 7.54 0.3 11 2H-5, 11-16 11.01 0.24 11 3H-2, 99-105 16.89 0.24 11 4H-2, 75-81 26.15 0.21 11 5H-2, 60-66 35.5 0.25 11 7H-2, 70-76 54.6 0.35 11 8H-3, 65-71 65.55 0.28 9H-2, 55-61 73.45 0.25 10H-2, 75-81 83.15 0.95 14H-3, 78-84 114.18 0.37 16H-3, 60-66 132 0.17 18H-3, 50-56 150.9 0.35 21H-2, 82-88 178.22 0.19 22H-2, 108-114 187.98 0.25 201-1228E- 1H-1, 168-174 1.68 0.16 1H-2, 20-26 2.2 0.13 1H-3, 76-82 4.26 0.49 1H-4, 60-66 5.6 0.16