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Seamounts have an average area of 790 km 2 (310 sq mi), with the smallest seamounts found in the Arctic Ocean and the Mediterranean and Black Seas; whilst the largest mean seamount size, 890 km 2 (340 sq mi), occurs in the Indian Ocean. The largest seamount has an area of 15,500 km 2 (6,000 sq mi) and it occurs in the North Pacific.
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island, islet or Cliff-rock. Seamounts are typically formed from extinct volcanoes that rise abruptly and are usually found rising from the seafloor to 1,000–4,000 m (3,300–13,100 ft) in height.
The Bear Seamount (left), a guyot in the northern Atlantic Ocean. In marine geology, a guyot (/ ˈ ɡ iː. oʊ, ɡ iː ˈ oʊ /), [1] [2] also called a tablemount, is an isolated underwater volcanic mountain with a flat top more than 200 m (660 ft) below the surface of the sea. [3]
The newly discovered seamount off the coast of Chile is 3,109 meters or 1.9 miles tall. - Schmidt Ocean Institute Many of the world’s highest mountains aren’t visible on land — they rise up ...
Kamaʻehuakanaloa Seamount [6] (previously known as Lōʻihi) is an active submarine volcano about 22 mi (35 km) off the southeast coast of the island of Hawaii. [7] The top of the seamount is about 3,200 ft (975 m) below sea level. This seamount is on the flank of Mauna Loa, the largest active subaerial shield volcano on Earth.
“A seamount over 1.5 kilometers tall which has, until now, been hidden under the waves really highlights how much we have yet to discover,” Dr Jyotika Virmani, executive director of SOI, said.
A seamount nearly twice the height of the world’s tallest building has been discovered on the ocean floor near Guatemala — and serves as a biodiversity hot spot.
Studies have indicated that a seamount functions as an "oasis of life," with a higher species count and more biodiversity than the surrounding seafloor. [4] Although previous analysis has stressed the exceptionalism of the seamount habitat, recent biological analysis, much of it centered on Davidson Seamount, has indicated that this does not necessarily translate into a higher endemic percentage.