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Divergent movement
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- This ridge is the result of tectonic activity, specifically the divergent movement of the Eurasian and North American plates. At the Mid-Atlantic Ridge, magma from the Earth’s mantle rises to the surface, creating new crust and pushing the existing crust apart.
geoscience.blog/decoding-the-mid-atlantic-ridge-unveiling-the-true-nature-of-earths-enigmatic-oceanic-feature/Decoding the Mid-Atlantic Ridge: Unveiling the True Nature of ...
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Mid-Atlantic Ridge. The North American and Eurasian Plates are moving away from each other along the line of the Mid Atlantic Ridge. The Ridge extends into the South Atlantic Ocean between the South American and African Plates.
- Triple Junction
The Afar region in Northern Ethiopia is the centre of a “Y”...
- Triple Junction
A mid-ocean ridge is an underwater mountain chain of volcanoes built up after repeated eruptions at a constructive boundary, when the sea floor spreads apart, e.g. the 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 Azores Triple Junction.
The Mid-Atlantic Ridge is located at the juncture of crustal plates that form the floor of the Atlantic Ocean; it is considered a "slow-spreading" ridge by earth scientists. Running along the crest of the ridge is a long valley that is about 50 to 75 miles (80 to 120 km) wide.
- The Editors of Encyclopaedia Britannica
- Description
- Notable Features
- History of Exploration
The Mid-Atlantic Ridge (MAR) is known as a mid-ocean ridge, an underwater mountain system formed by plate tectonics. It is the result of a divergent plate boundary that runs from 87° N – about 333 km (207 mi) south of the North Pole – to 54 °S, just north of the coast of Antarctica. Like other ocean ridge systems, the MAR developed as a consequence...
As noted, the ridge (while mainly underwater) does have islands and island groups that were created by volcanic activity. In the Northern Hemisphere, these include Jan Mayen Island and Iceland (Norway), and the Azores (Portugal). In the Southern Hemisphere, MAR features include Ascension Island, St. Helena, Tristan da Cunha, Gough Island (all UK te...
The ridge was initially discovered in 1872 during the expedition of the HMS Challenger. In the course of investigating the Atlantic for the sake of laying the transatlantic telegraph cable, the crew discovered a large rise in the middle of the ocean floor. By 1925, its existence was confirmed thanks to the invention of sonar. By the 1960s, scientis...
Map showing the Mid-Atlantic Ridge splitting Iceland and separating the North American and Eurasian Plates. The map also shows Reykjavik, the capital of Iceland, the Thingvellir area, and the locations of some of Iceland's active volcanoes (red triangles), including Krafla.
Mar 8, 2021 · Geologists have long thought that mid-ocean ridges are relatively passive participants in plate tectonics. But a new study shows that there might be more activity going on beneath the...
