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Mid-ocean ridges around the globe are linked by plate tectonic boundaries and the trace of the ridges across the ocean floor appears similar to the seam of a baseball. The mid-ocean ridge system thus is the longest mountain range on Earth, reaching about 65,000 km (40,000 mi).
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 Azores triple junction.
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 undersea mountain range is a mid-ocean ridge, the Mid-Atlantic Ridge. [1]
Tamu Massif is a seamount in the northwest Pacific Ocean, [3] sitting atop a triple junction of mid-ocean ridges. [1] Tamu Massif is located in the Shatsky Rise about 1,600 km (990 mi) east of Japan. The massif covers an area of about 553,000 square kilometres (214,000 sq mi).
Thus these, the longest faults under the Atlantic Ocean have a total offset of the system of over 340 km (210 mi). [3]: 2 The northern rift mountains of the fracture zone are higher than those in the south, [2]: 193 as part of a geological transition in the North Atlantic sea floor which is higher to the north of the fracture zone.
It is a dome-shaped region approximately 10 miles (16 km) across and rising about 14,000 feet (4,267 m) from the sea floor. It is located at approximately 30°8′N latitude 42°8′W longitude; just east of the intersection of the Mid-Atlantic Ridge with the Atlantis Transform Fault. The highest point of the massif is around 700 metres (2,297 ...
Viaud Ridge is an underwater mountain range in the Indian Ocean [1] located in the Laccadive Sea. [2] The neighbouring land masses are Sri Lanka, [1] [3] with the capital Colombo 650 kilometers to the north-north-east, [1] [4] [5] the southern tip of India to the north and the Maldives to the west, at the latitude of Addu Atoll.
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 ...