Seamount 3
Seamount 3 : An undersea, relatively isolated mountain rising from the seafloor to a height of about 1,000 m (3,300 feet). It if has a pointed summit it is called a sea peak; if it is flat-topped, it is called a guyot. The shape of most seamounts is elliptical. Only the very small ones have steep sides; large ones have gendy sloping sides. These features are true for the seamounts present in every ocean. Hundreds of these mountains have been mapped, particularly in the Pacific, and it has been estimated by oceanographers that this number is only a small portion of the total. Although they are separate entities, seamounts occur in groups or chains, as do island arcs. Seamounts seem to be of volcanic origin, and may result from eruptions along crustal fissures. In most cases the volcanic cone shows signs of weathering (erosion). There may be sedimentary accretion on a seamount, or a coral reef that has used the dormant or dead volcano as a base for growth. Some seamounts, including a significant number with coral or limestone tops, are below the level of coral growth. This suggests subsidence by an unknown mechanism
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