(Table T2) Hydrogen, helium, and methane gas concentrations in PCS gas sample...

Sediment depth is given in mbsf. Sample start and stop volumes note the amount of gas sampled (e.g. 145-100 equates to 45 mL gas in the sample).沉积物深度以海底以下米（meters below sea floor, mbsf）为单位给出。样品的取样起始体积与终止体积标注了所采集的气体量，例如，145-100即表示该样品中的气体取样量为45毫升。