Initial Reports, Volume 201 Shipboard Scientific Party Chapter 12, Table T4. Oxygen concentrations by microelectrode, Hole 1231D. Core, section, interval (cm) Depth (mbsf) Oxygen (uM) 201-1231D- 1H-1, 18 0.18 127 1H-1, 40 0.4 86 1H-1, 60 0.6 40 1H-1, 80 0.8 <20 1H-1, 97 0.97 <20 1H-1, 120 1.2 <20 1H-2, 10 1.6 <20 1H-3, 10 3.1 <20 1H-4, 10 4.6 <20 12H-1, 75 103.55 <20 12H-3, 75 106.55 <20 12H-5, 75 109.55 36 13H-1, 75 113.05 92 13H-2, 75 114.55 157