Why Mid-Oceanic Ridge is elevated compared to other parts of the seafloor?
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.
Why are mid-ocean ridges elevated quizlet?
The Mid-Oceanic Ridge is elevated above surrounding seafloor because it is made of hotter and less dense lithosphere than oceanic crust farther away from the divergent boundary.
Why does oceanic lithosphere Subduct even when the oceanic crust is less dense than the underlying asthenosphere?
Explain why oceanic lithosphere subducts even though the oceanic crust is less dense than the underlying asthenosphere. Oceanic lithosphere subducts because its overall density is greater than that of the underlying mantle.
What are two reasons why the ocean ridge is important?
Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a "spreading center" or a "divergent plate boundary." The plates spread apart at rates of 1 cm to 20 cm per year.
Why are mid-oceanic ridge rises the highest part of deep ocean basins?
What explains the high elevations of mid-ocean ridges and the flanks of rift valleys? Because mid-ocean ridges lie at a higher elevation than the rest of the ocean floor gravity causes the ridge to push on the lithosphere that lies farther from the ridge.
What causes mid-ocean ridges to form?
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 explains the high elevations of mid-ocean ridges?
What explains the high elevations of mid-ocean ridges and the flanks of rift valleys? Because mid-ocean ridges lie at a higher elevation than the rest of the ocean floor gravity causes the ridge to push on the lithosphere that lies farther from the ridge.
What is responsible for 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.
Why does oceanic lithosphere Subduct under continental lithosphere whereas continental lithosphere does not Subduct under oceanic lithosphere?
-The oceanic lithosphere is denser than the continental lithosphere so it subducts. That means it gets shoved down underneath the overriding plate. The overriding plate doesn't subduct because it is made up of less dense rock.
Why does the oceanic crust sink beneath the continental crust at then subduction zone?
Because ocean crust is more dense than continental crust, it will sink beneath continents if tectonic forces push the oceanic crust into the continent.
How are oceanic ridge system created?
If the tectonic plates move away from each other, magma from the asthenosphere can push up through the gap causing an underwater volcano. The magma cools and solidifies, creating new layers of ocean crust that continues to build, forming the oceanic ridges.
What explains the high elevations of mid-ocean ridges and the flanks of rift valleys?
What explains the high elevations of mid-ocean ridges and the flanks of rift valleys? Because mid-ocean ridges lie at a higher elevation than the rest of the ocean floor gravity causes the ridge to push on the lithosphere that lies farther from the ridge.
Which boundary movement causes the formation of oceanic ridge?
When two plates are moving away from each other, we call this a divergent plate boundary. Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere. Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges.
What plate boundary causes oceanic ridges?
divergent plate boundaries 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 type of tectonic plate boundary created the Mid-Atlantic Ridge?
divergent plate boundaries The Mid-Atlantic Ridge is an example of divergent plate boundaries. When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench.
What explains the high elevation of mid-ocean ridges and the flanks of rift valleys?
What explains the high elevations of mid-ocean ridges and the flanks of rift valleys? Because mid-ocean ridges lie at a higher elevation than the rest of the ocean floor gravity causes the ridge to push on the lithosphere that lies farther from the ridge.
What causes mid-ocean ridges?
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.
Which action contributes to mid-ocean ridge formation?
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.
Why is oceanic lithosphere subducted during an oceanic continental collision whereas the continental plate is not group of answer choices?
Why does oceanic lithosphere subduct while continental does not? Oceanic lithosphere subducts because its overall density is greater than that of the underlying mantle.
Why is oceanic portion lithospheric plate generally subducted whereas continental plate is not?
Subduction occurs because the density of the descending tectonic plate is greater than the density of the underlying asthenosphere, whereas continental lithosphere is less dense and resists subduction. As a consequence, only oceanic lithosphere will subduct to greater depths.
Why does the oceanic crust sink beneath the continental crust at the subduction zone Quizizz?
Why does oceanic crust sink beneath the continental crust at a subduction boundary? The oceanic crust has a greater density. The continental crust is made of dark-colored rocks. Gravity is stronger in the ocean due to all the water on top.
Why do the continents sit higher than the ocean?
Layers that are less dense, such as the crust, float on layers that are denser, such as the mantle. Both oceanic crust and continental crust are less dense than the mantle, but oceanic crust is denser than continental crust. This is partly why the continents are at a higher elevation than the ocean floor.
Which type of boundaries movement causing the formation of oceanic ridges?
When two plates are moving away from each other, we call this a divergent plate boundary. Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere. Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges.
Why are mid-ocean ridges important to the theory of plate tectonics quizlet?
Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force(ridge push). When tectonics plate collide, the denser plate will sink into the mantle along a subduction zone.
How are oceanic ridges formed?
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.
What causes the motion of oceanic oceanic divergent boundary?
Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle. Picture two giant conveyor belts, facing each other but slowly moving in opposite directions as they transport newly formed oceanic crust away from the ridge crest.
What caused the mid-ocean ridge to form?
It formed and evolves as a result of spreading in Earth's lithosphere—the crust and upper mantle—at the divergent boundaries between tectonic plates. The vast majority of volcanic activity on the planet occurs along the mid-ocean ridge, and it is the place where the crust of the Earth is born.
What caused the formation of the Mid-Atlantic Ridge?
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.
How does a mid-ocean ridge form?
It formed and evolves as a result of spreading in Earth's lithosphere—the crust and upper mantle—at the divergent boundaries between tectonic plates. The vast majority of volcanic activity on the planet occurs along the mid-ocean ridge, and it is the place where the crust of the Earth is born.
How oceanic ridges are formed?
If the tectonic plates move away from each other, magma from the asthenosphere can push up through the gap causing an underwater volcano. The magma cools and solidifies, creating new layers of ocean crust that continues to build, forming the oceanic ridges.