Figure F1. A. Location and geological setting of Hydrate Ridge. Juan de Fuca plate is obliquely subducting beneath North American plate ~20 km west of the ridge. Box denotes area of the detailed bathymetric map. B. Detailed bathymetric map of the southern Hydrate Ridge and drilling sites of Leg 204. From Tréhu, Bohrmann, Rack, Torres, et al. (2003).