High Quality Content by WIKIPEDIA articles! Henry William Posamentier (born December 4, 1948) is an American geologist. He helped pioneer and develop the modern approach to sequence stratigraphy, blending the disciplines of sedimentology, stratigraphy, and depositional systems analysis, largely within the context of oil and gas exploration. During the past decade he pioneered and popularized the discipline of seismic geomorphology, which, when integrated with seismic stratigraphy, leverages both 2D and 3D seismic data to better understand the paleogeographic distribution of lithologies.