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Map of Earth's plate boundaries and active volcanoes More detailed map showing volcanoes active in the last 1 million years These lists cover volcanoes by type and by location. Type
Map of world's major seamounts. A list of active and extinct submarine volcanoes and seamounts located under the world's oceans. There are estimated to be 40,000 to 55,000 seamounts in the global oceans. [1] Almost all are not well-mapped and many may not have been identified at all. Most are unnamed and unexplored.
Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt. Many submarine volcanoes are located near areas of tectonic plate formation, known as mid-ocean ridges. The volcanoes at mid-ocean ridges alone are estimated to account for 75% of the magma output on Earth. [1]
Map of Bering Canyon and four other submarine canyons in the Bering Sea. Bering Canyon, in the Bering Sea near the Aleutian Islands, Alaska, the United States; Kaikōura Canyon, off the coast of the Kaikōura Peninsula, New Zealand; La Jolla Canyon, off the coast of La Jolla, California; Monterey Canyon, off the coast of central California, the ...
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.
Name Elevation Location Last eruption meters feet Coordinates; Bowie Seamount-24-79: 18,000 BC Adams Seamount-59-194: 50 BCE Axial Seamount-1410: 4626: 1998
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.
A submarine canyon is a steep-sided valley cut into the seabed of the continental slope, sometimes extending well onto the continental shelf, having nearly vertical walls, and occasionally having canyon wall heights of up to 5 km (3 mi), from canyon floor to canyon rim, as with the Great Bahama Canyon. [1]