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Which is denser old oceanic crust or new oceanic crust?
how is this food and cooking? it is geography
What happens to the density of new oceanic lithosphere when it cools?
As the lithosphere cools, asthenosphere's hot rocks freeze onto their undersides. So lithosphere becomes thicker. As time goes on or within the time period of 10 million years, it even becomes thicker than asthenosphere.
What are the characteristics of the oceanic crust?
Oceanic crust is thinner and denser than continental crust, primarily composed of basaltic rock. It is typically younger due to the process of seafloor spreading, where new crust is formed at mid-ocean ridges and pushes older crust away. Oceanic crust is also more mafic in composition compared to continental crust.
Where does the oceanic crust begin?
The oceanic crust begins at the Mid-Ocean Ridge, where tectonic plates are moving apart, allowing magma to rise and solidify, forming new crust. This process of seafloor spreading creates the youngest oceanic crust at the ridge and older crust farther away from it.
Why is oceanic crust younger than the continental crust?
oceanic crust is constantly being subducted and replaced with new material at places like the mid Atlantic ridge.
Why does one continental plate slide under the other?
Because magma rises through hot spots( holes in the ground on the ocean floor) and cools forming new crust which repeats over hundreds of years making the oceanic crust more dense than continental crust. Since the oceanic crust is more dense, it sinks faster causing it to slide under the continental crust
Earth does not get bigger as new oceanic crust forms?
Just as new oceanic crust forms at mid-ocean ridges, old oceanic crust is destroyed at subduction zones.
Where is oceanic crust created?
New oceanic crust is created at the mid-oceanic ridges, a divergent plate boundary.
Is oceanic lithosphere lighter than continental lithosphere?
no
Why isn't new oceanic crust generated along volcanic island arcs?
At a volcanic island arc, an oceanic plate slides into the mantle and thus oceanic crust is destroyed. The volcanoes add material on to of the crust, but to not cause the crust to expand outward.
Is the oceanic crust near a mid-ocean ridge thicker or thinner than the oceanic crust away from the mid-ocean ridge?
The Oceanic Crust close to the Mid Ocean Ridge is thinner than that Oceanic Crust far away from the ridge. This is due to tensional forces, as a result of crustal expansion and rock fracturing during the formation of the ridge.the oceanic crust is thinner
What force drives the process of pulling dense pieces of oceanic crust downward towards the mantle?
The force driving the process of pulling dense pieces of oceanic crust downward towards the mantle is gravity. As oceanic crust cools and becomes denser, it sinks into the mantle due to gravitational forces. This process is known as subduction.
