Figure 1. Methane ¹³C values plotted against depth of recovery for samples derived from gas voids in APC and XCB cores (solid circles) and from degassing of pressurized cores in the PCS (open circles) during Leg 164. Isotopic data for PCS gas samples are in Table 1. Data for gas voids are in Paull et al. (Chap. 7, this volume). A. Site 994. B. Site 995. C. Site 997.