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Gravity
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What draws dense rock away from Mid ocean ridges?
The process that draws dense rock away from mid-ocean ridges is called slab pull. This occurs due to the subduction of oceanic plates at convergent boundaries, where the dense oceanic crust sinks back into the mantle, creating a force that pulls the rest of the plate away from the ridge.
Do Ocean sediments become younger or older away from midocean ridges?
Older, as it moves away from the mid-ocean ridge the sediment gets thicker and older
What is a force that is causing the plates to move at a midocean ridge?
friction - convection currents in the mantle drag the plates away from the hot rising zone below the ridgegravity - gravity pulls down on the cold dense plate being subducted under the continent, dragging the plate away from the ridge
Why does oceanic lithosphere sink at subduction zones but not at mid ocean ridges?
oceanic lithosphere sinks at subduction zones but not at mid ocean ridges because at subduction zones the oceanic lithosphere is subducted, or sinks, under another plate. Oceanic Lithosphere sinks at subduction zones which are usually at convergent boundaries, but at mid-ocean ridges the plates are actually separating not coming together
How does sea-floor spreading occur?
as convection currents cause more magma to rise the new magma forces apart the hardened material and like a conveyer belt continuously pushes older rocks aside
Oceans become deeper moving away from ridges due to?
As the sheets of oceanic crust move away from the mid-ocean ridge, the rock is cooled and thus becomes heavier. After about 200 million years, the cooled Lithospheric plate has become heavier than the Asthenosphere that it rides over, and it sinks, thereby producing a subduction zone.
What happens the age of rock with distance from the mid ocean ridges?
The age of rock increases with distance from mid-ocean ridges. At the ridges, new oceanic crust is formed through volcanic activity, which is young. As the crust moves away from the ridges, it cools and becomes older. This process is known as seafloor spreading.
What the heatsink does?
It draws heat away fom the object that is is being used on.
What is the meaning of Abductor?
Someone or something which leads away or draws back.
How did harry hess hypothesis explain seafloor movement?
Harry hess' hypothesis was hot/less dense material rises up the Earth's crust toward the mid-ocean ridges. When the seafloor breaks apart, magma is forced upward and through the cracks. It cools, and becomes a new seafloor. When it moves away from the mid-ocean ridge, it becomes denser and sinks. This helps form ridges.
How do earths magnetic pole reversals provide evidence for plate tectonics?
Magnetic stripes can be seen as you move away from ocean ridges.
What is the oceans crust?
The oceanic crust is part of the crust that is made fully out of basaltic rock and is several times thinner than the continental crust which is made out of granitic rock. Oceanic crust underlies Earth's oceans and is produced at divergent plate boundaries which are commonly referred to as mid-ocean ridges. As it grows from infilling magma and spreads away from the ridges, it will becomes cooler, thicker, and more dense, and will eventually sink into the mantle.
