surrounded by surrounded by ocean sea mountain seamount mount mesa peak Geonames:U.KNLU https://en.wikipedia.org/wiki/Seamount knoll mountains ENVO:00000264 submarine volcano Geonames:U.SMU Geonames:U.PKU EcoLexicon:seamount seakpeak Geonames:U.SMSU Geonames:U.KNSU seaknoll Geonames:MTSU sea-mount range Geonames:U.HLLU sea mount FTT:1241 Geonames:U.PKSU ENVO Geonames:U.HLSU Geonames:U.MTU mount Geonames:RNGU knolls Geonames:U.MNDU undersea hill mound Geonames:U.MESU peaks EcoLexicon:mountain TGN:23178 TGN:23133 TGN:23132 TGN:23176 hill TGN:23175 TGN:23172 mountain hills undersea knoll A mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island. Typically formed from volcanoes that rise abruptly and are usually found rising from a seafloor of 1,000 - 4,000 meters depth. Independent features that rise to at least 1,000 meters above the seafloor. undersea mound planetary crust