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IS seafloor spreading associated with mid-ocean ridges?
Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate. Seafloor spreading is not consistent at all mid-ocean ridges.
What happens as the seafloor spreads apart?
In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added. As a result, the ocean floors move like conveyor belts, carrying the continents along with them.
What is the effect of mid-ocean ridge?
Impact on global sea level Increased seafloor spreading means that the mid-ocean ridge will then expand and form a broader ridge with decreased average depth, taking up more space in the ocean basin. This displaces the overlying ocean and causes sea levels to rise.
What do you expect to find at a mid-ocean ridge?
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
What is the role of mid-ocean ridge in the movement of lithospheric plates?
Mid-ocean ridges are the longest, largest and most voluminous magmatic environment on Earth. Ridges are the site of new lithospheric and crustal production that may be subsequently subducted into the mantle and recycled, or involved in magma-producing dehydration reactions that slowly build up continental crust (Fig.
What is sea floor spreading theory?
seafloor spreading, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them.
What occurs at mid-ocean ridges quizlet?
A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.
What is the role of mid oceanic ridge in the movement of lithospheric plates?
Would you expect to see a folded mountain range at a mid-ocean ridge?
A reverse fault because both reverse faults and folding occur in areas where compression takes place. Would you expect to see a folded mountain range at a mid-ocean ridge? Explain. No, you are more likely to see volcanic mountains where magma is rising along the mid-ocean ridge spreading center.
What causes the mid-ocean ridges to form?
What processes occur at mid-ocean ridges?
There are two processes, ridge-push and slab-pull, thought to be responsible for the spreading seen at mid-ocean ridges, and there is some uncertainty as to which is dominant. Ridge-push occurs when the weight of the ridge pushes the rest of the tectonic plate away from the ridge, often towards a subduction zone.
What process occurs at mid-ocean ridges?