A guyot, also known as a tablemount, is an underwater volcanic mountain with a flat top, usually found in deep ocean basins. Guyots are formed by volcanic activity and are later eroded to sea level, creating the flat summit. They are significant in studying the geological history of ocean basins, plate tectonics, and the evolution of volcanic islands.
Source Menard, H. W. (1984). Origin of Guyots: The Beheaded Volcanoes. Geological Society of America Bulletin.