EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Molten rock rises from magma from the mantle and fills the gaps between plates.
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The ridge where the North American and Eurasian plates meet and diverge, moving away from each other.
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Magma hardens and forms new crust along the edges of the plates
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None of the above
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Detailed explanation-1: -The Mid Atlantic Ridge, like other ocean ridge systems, has developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates.
Detailed explanation-2: -The Mid-Atlantic Ridge includes a deep rift valley that runs along the axis of the ridge for nearly its entire length. This rift marks the actual boundary between adjacent tectonic plates, where magma from the mantle reaches the seafloor, erupting as lava and producing new crustal material for the plates.
Detailed explanation-3: -The MAR separates the North American Plate from the Eurasian Plate in the North Atlantic, and the South American Plate from the African Plate in the South Atlantic. These plates are still moving apart, so the Atlantic is growing at the ridge, at a rate of about 2.5 cm per year in an east-west direction.
Detailed explanation-4: -What causes mid-ocean ridges to form? Mid-ocean ridges form at divergent plate boundaries, where seafloor spreading leads to the production of new ocean crust. This new crust is formed due to igneous intrusions and extrusions as magma either cools beneath the Earth’s surface or erupts as lava above the Earth’s surface.