Guyot

In marine geology, a guyot (/ˈɡiː.oʊ, ɡiːˈoʊ/),^[1][2] also called a tablemount, is an isolated underwater volcanic mountain (seamount) with a flat top more than 200 m (660 ft) below the surface of the sea.^[3] The diameters of these flat summits can exceed 10 km (6 mi).^[3] Guyots are most commonly found in the Pacific Ocean, but they have been identified in all the oceans except the Arctic Ocean. They are analogous to tables (such as mesas) on land.