The objective of this project is to evaluate the role of fluid flow, overpressuring, and gas migration in the creation and moderation of submarine geomorphology. This project addresses questions about: 1) the lateral and vertical extent of detectable overpressued fluids and gas in the subsurface, 2) gas-related structures and manifestations of flow on the surface, 3) seafloor geomorphology related to gas and fluid expulsion, and 4) structural controls on gas and fluid conduits and ex%ulsion sites.