Seamounts are prominent seafloor features found globally at convergent margins, where their eventual subduction has been observed to have significant effect on upper plate morphology, and is predicted to influence megathrust slip behavior. While shallow subduction of partially buried seamounts has been inferred to play a role in tectonic erosion and deformation of the upper plate (e.g., Dominguez et al., 1998;Von Huene & Scholl, 1991), less is known about what happens as a seamount subducts further because of the limited resolution of geophysical methods commonly used to identify subducting seamounts. Previous studies have imaged buried seamounts at shallow stages of subduction (e.g.,