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Undersea mountain ranges are mountain ranges that are mostly or entirely underwater, and specifically under the surface of an ocean. If originated from current tectonic forces, they are often referred to as a mid-ocean ridge. In contrast, if formed by past above-water volcanism, they are known as a seamount chain. The largest and best known ...
Mid-ocean ridge cross-section (cut-away view) A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of about 2,600 meters (8,500 ft) and rises about 2,000 meters (6,600 ft) above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate ...
Mid-Atlantic Ridge. The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world. In the North Atlantic, the ridge separates the North American from the Eurasian Plate and the African Plate, north and south of the ...
The Hawaiian–Emperor seamount chain is a mostly undersea mountain range in the Pacific Ocean that reaches above sea level in Hawaii.It is composed of the Hawaiian ridge, consisting of the islands of the Hawaiian chain northwest to Kure Atoll, and the Emperor Seamounts: together they form a vast underwater mountain region of islands and intervening seamounts, atolls, shallows, banks and reefs ...
A mid-ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges (chains), typically having a valley known as a rift running along its spine, formed by plate tectonics. This type of oceanic ridge is characteristic of what is known as an oceanic spreading center, which is responsible for seafloor ...
Viaud Ridge is an undersea mountain range in the Indian Ocean located south of India, southwest of Sri Lanka and east of the Maldives. Its morphology remains poorly defined: estimates range from between 15 and 25 kilometers long, peaking at about 1,700 meters above the ocean floor. Discovered in 1970, it was only named in 1993 in honor of the ...
The Cayman Ridge is an undersea mountain range on the northern margin of the Cayman Trough in the Caribbean Sea. It extends from the Sierra Maestra in the east to the Misteriosa Bank and Rosario Bank in the west, a distance of about 1,500 km (930 mi). The Cayman Ridge also includes the Cayman Islands. [1]
They occasionally reach above the sea surface as islands. East of the undersea mountain ranges are three oceanic trenches: the Kuril–Kamchatka Trench (max depth 10,542 m (34,587 ft)), Japan Trench (max depth 10,375 m (34,039 ft)), and Izu–Ogasawara Trench (max depth 9,810 m (32,190 ft)).