Figure F3. Plot of methane delta13C of void gas samples as a function of burial depth. A. Gas samples from Sites 1244, 1246, 1251, and 1252 on landward side of Hydrate Ridge. B. Gas samples from Sites 1245 and 1247 on seaward side of Hydrate Ridge that penetrate Horizon A. C. Gas samples from Sites 1248, 1249, and 1250 at or near the southern summit of Hydrate Ridge.

Figure F3. Plot of methane

¹³C of void gas samples as a function of burial depth. A. Gas samples from Sites 1244, 1246, 1251, and 1252 on landward side of Hydrate Ridge. B. Gas samples from Sites 1245 and 1247 on seaward side of Hydrate Ridge that penetrate Horizon A. C. Gas samples from Sites 1248, 1249, and 1250 at or near the southern summit of Hydrate Ridge.