0
What else can I help you with?
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.
Why does new crust form but the earth doesn't get larger?
New crust is constantly being formed at mid-ocean ridges through volcanic activity. However, the Earth does not get larger because as new crust is formed, older crust is subducted back into the mantle at subduction zones, maintaining a relatively constant amount of crust on the Earth's surface.
How is new crust continually being formed?
New crust is continually being formed at mid-ocean ridges through the process of seafloor spreading. Magma rises from the mantle and solidifies at the ridges, creating new crust as tectonic plates move apart. The crust then slowly spreads outward as more magma comes up, constantly renewing the Earth's surface.
How is magnesium used to support the theory of seafloor spreading?
Magnesium is used to support the theory of seafloor spreading because as new oceanic crust forms at mid-ocean ridges, it contains higher levels of magnesium compared to older crust. This can be observed through magnetic anomalies in the oceanic crust, where variations in magnesium content create distinct magnetic stripes that align with the spreading centers. This provides evidence that new crust is being continuously generated at mid-ocean ridges, supporting the process of seafloor spreading.
Convection currents in the plastic mantle are believed to cause divergence of lithosphereic plates at the?
mid-ocean ridges. This process leads to the formation of new oceanic crust as magma rises and solidifies at the surface, pushing the plates apart. As the new crust is generated, the older crust is pushed away from the ridge, creating a continuous cycle of plate movement.
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.
Where new crust is being formed?
New oceanic crust is continually being created at the Mid-Ocean ridges.
How can crust disappear at the edge of the boundary?
New crust is being added to the other edge of the boundary
Why does new crust form but the earth doesn't get larger?
New crust is constantly being formed at mid-ocean ridges through volcanic activity. However, the Earth does not get larger because as new crust is formed, older crust is subducted back into the mantle at subduction zones, maintaining a relatively constant amount of crust on the Earth's surface.
How is new crust continually being formed?
New crust is continually being formed at mid-ocean ridges through the process of seafloor spreading. Magma rises from the mantle and solidifies at the ridges, creating new crust as tectonic plates move apart. The crust then slowly spreads outward as more magma comes up, constantly renewing the Earth's surface.
Does seafloor spreading cause the earth's crust to expand?
Yes, seafloor spreading is a process where new oceanic crust is formed at mid-ocean ridges, causing the Earth's crust to expand. This occurs as magma rises to the surface, solidifies, and pushes older crust away from the ridge, creating new seafloor.
What is the layer of earth under the crust in which plate movement is generated?
the mantle
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.
How is magnesium used to support the theory of seafloor spreading?
Magnesium is used to support the theory of seafloor spreading because as new oceanic crust forms at mid-ocean ridges, it contains higher levels of magnesium compared to older crust. This can be observed through magnetic anomalies in the oceanic crust, where variations in magnesium content create distinct magnetic stripes that align with the spreading centers. This provides evidence that new crust is being continuously generated at mid-ocean ridges, supporting the process of seafloor spreading.
Is crust being destroyed or created?
near ocean trenches.
Why is rock formed at th ridges called new rock?
Since the rock just came up and cooled, it's "new oceanic rock." Because... it's new rock. It's the youngest rock. It just came out of the ground and cooled, making it rock. Or Because new crust is being formed while the old crust is being pushed away.
What are the waves generated by an earthquake?
the crust of the earth is swithching over each other
