Figure 2. The ¹⁸O (SMOW) of interstitial waters at (A) Site 994 and (B) Site 997. Dotted lines represent baselines for the interstitial waters seemingly unaffected by gas hydrate dissociation. Baseline for Site 994: Y = 0.886 + (-1.20e-02)X + (4.23e-05)X² + (-8.06e-08)X³ + (1.01e-10)X⁴ + (-5.85e-14)X⁵, (r² = 0.9906). For Site 997: Y = 0.245 + (-7.43e-04)X + (-2.44e-05)X² + (7.29e-08)X³ + (-4.82e-11)X⁴ + (-6.34e-5)X⁵, (r² = 0.9890), where Y is ¹⁸O_H2O (SMOW) and X is depth (mbsf).