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Is oceanic lithosphere lighter than continental lithosphere?
no
What marks the site where old oceanic lithosphere begins its descent into a subduction zone?
The site where old oceanic lithosphere begins its descent into a subduction zone is marked by a deep oceanic trench. Trenches are long, narrow depressions in the ocean floor that form where two tectonic plates converge and one is forced beneath the other. This process is associated with intense seismic activity and volcanic arcs.
What is the process where new oceanic lithosphere formed?
New oceanic crust is created at the mid-ocean ridges where rift volcanoes feed solidifying magma from the asthenosphere to both sides of the divergent plate boundaries. The mid-ocean ridge marks the line where heat from the Earth's interior is being carried to the surface by convection currents in the mantle. At the opposite end of the convection currents, colder, denser, and older oceanic crust is being drawn down into the asthenosphere, the birth to death of oceanic crust occurring in roughly 150 million year cycles.
Is the sea floor spreading constructive or destructive?
Sea floor spreading is considered a constructive process because it involves the formation of new oceanic crust at mid-ocean ridges. As tectonic plates move apart, magma rises to the surface and solidifies, creating new crust. This process helps in the continuous renewal of the oceanic lithosphere.
How does evidence that rocks farther from a ridge are older than rocks closer to the ridge support the idea of sea floor spreading?
The evidence that rocks farther from a ridge are older than rocks closer to the ridge supports the idea of sea floor spreading because it aligns with the concept of a divergent boundary where new oceanic crust is continuously formed at the ridge and gradually moves away from the ridge over time. This process allows for the creation of age gradients in the oceanic crust, with the youngest rocks found near the ridge and progressively older rocks located farther away.
What happens to the ocean floor farther to the oceanic lithosphere is from a mid ocean ridge?
Magma rises and slidifies and creates a new crust.
What happens to the ocean floor the farther the the oceanic lithosphere is from a mid-ocean ridge?
Magma rises and slidifies and creates a new crust.
What happens to the ocean floor the farther the oceanic lithosphere is from the mid ocean ridge?
Magma rises and slidifies and creates a new crust.
What happens to the ocean floor the farther the oceanic lithosphere is from a mid-ocean ridge?
Magma rises and slidifies and creates a new crust.
New oceanic lithosphere forms as a result of?
New oceanic lithosphere forms as a result of seafloor spreading at mid-ocean ridges. Magma rises from the mantle, solidifies at the mid-ocean ridge, and creates new oceanic crust. This process leads to the continuous expansion of the ocean floor.
What is oceanic crust composed of?
The oceanic crust composed of sima, mafic rocks and basalt. This is the top layer of the lithosphere which is found in the ocean floor.
What results when divergence occurs in the oceanic lithosphere?
When divergence occurs in the oceanic lithosphere, it leads to the formation of mid-ocean ridges where new crust is created as magma rises from the mantle and solidifies. This process is responsible for the spreading of the ocean floor and the formation of new oceanic crust.
Is oceanic lithosphere lighter than continental lithosphere?
no
The oceans crust is composed of what?
The oceanic crust composed of sima, mafic rocks and basalt. This is the top layer of the lithosphere which is found in the ocean floor.
What evidence can prove that the ocean floor was moving?
Oceanic crust that was farther away from a mid-ocean ridge was older that crust closer to the ridge
What happens in sea floor spreading?
under water volcanoes move the oceanic plates and spread them
What evidence proved the ocean floor was moving?
oceanic crust that was farther away from a mid-ocean ridge was older than crust closer to the ridge
