839840.fig.006a
(a)
839840.fig.006b
(b)
Figure 6: ROV Hyper Dolphin photos showing push coring operation at nongas hydrate seep site (756-MB-1) for reference at Joetsu Knoll (a) and at gas hydrate mound (833-MBL-1) at Umitaka Spur (b). Note carbonate nodules on the seafloor at gas hydrate mound.