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Why do magnetic stripes appear on the seefloor?
The seafloor spreads apart, creating new rocks that record magnetic orientation. Small grains of magnetite on the volcanic basalt (ocean floor) have magnetic properties.
What is magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
When molten material hardens into the rock on the ocean floor the domains of the iron it contains?
align with Earth's magnetic field, freezing the magnetic orientation of those minerals. This creates a record of the Earth's magnetic field at the time of cooling, which scientists can study to understand past changes in the planet's magnetic field.
What is used as evidence for sea-floor spreading-?
The rocks on either side of a mid-ocean ridge record the direction of the Earth's magnetic field at the time they were formed, and form a pattern of 'magnetic stripes' on either side of the ridge which are symmetrical. It is also now possible to measure ocean widths with sufficient accuracy to show yearly changes.
Rock on the ocean floor provided the final proof of sea floor spreading with a record of?
magnetic stripes on either side of the Mid-Atlantic ridge. These parallel bands of alternating polarity were mirrored on each side of the ridge, providing evidence for seafloor spreading and the movement of tectonic plates.
Why do magnetic stripes appear on the seefloor?
The seafloor spreads apart, creating new rocks that record magnetic orientation. Small grains of magnetite on the volcanic basalt (ocean floor) have magnetic properties.
Why do magnetic stripes appear on the sea?
The seafloor spreads apart, creating new rocks that record magnetic orientation. Small grains of magnetite on the volcanic basalt (ocean floor) have magnetic properties.
Describe how the polarity of earth's magnetic field is recorded in the sea-floor?
Magnetic minerals in the Earth's crust align with the planet's magnetic field at the time of their formation. When new oceanic crust is created at mid-ocean ridges, these minerals record the direction of the Earth's magnetic field on the sea-floor. This creates alternating stripes of normal and reversed polarity as the sea-floor spreads.
How a prediction and then evidence of magnetism in rocks on the ocean floor proved that the seafloor spreads?
The Earth's magnetic reversals have been recorded in newly forming oceanic seafloor basalt by the orientation of magnetic minerals which become frozen in place as the magma hardens. When the next reversal occurs, it as well becomes part of the ocean floor magnetic record.
The magnetic record in the rock on the ocean floor depends on when the rock was?
The magnetic record in the rock on the ocean floor depends on when the rock was formed. When molten rock solidifies, it locks in the orientation of the Earth's magnetic field at that time. This provides a record of past magnetic field reversals and helps in studying the movement of tectonic plates.
What happens to the old ocean floor as the sea floor spreads?
As the sea floor spreads, the old ocean floor gets pushed out, which makes the plates move.
Is hit the floor the name of a record?
Yes, hit the floor is the name of a record. The band/singer that has created that record is called breakestra. The record costs about sixteen dollars.
Identify how magnetic symmetry can be used as evidence of sea floor spreading?
As the sea floor spreads the magnetic orientation in the rocks as they cooled is preserved. As the earth's magnetic field changes then a distinct pattern is imprinted in the rocks. If sea floor spreading is true then this unique pattern should be the same on both sides from the spreading point. Measurements of sea bottom rocks verify this symmetry is true. :)
What are Magnetic stripes on the sea floor caused by?
Magnetic stripes on the sea floor are caused by the alternating polarities of Earth's magnetic field. As magma rises and solidifies at mid-ocean ridges, it locks in the magnetic orientation of the Earth's field at that time. Over time, as the Earth's magnetic field reverses, these magnetic stripes are preserved, providing a record of past magnetic field variations.
Was the theory of sea floor spreading proved?
Yes, the theory of sea floor spreading was confirmed through the discovery of mid-ocean ridges, magnetic striping patterns on the ocean floor, and the study of ages of oceanic crust. This evidence supported the idea that new crust is continually created at mid-ocean ridges and spreads away from them.
What Causes of magnetic striping?
Magnetic striping on the ocean floor is caused by the movement of tectonic plates. As new oceanic crust is formed at mid-ocean ridges, Earth's magnetic field causes iron-rich minerals in the crust to align and record the direction of the magnetic field at that time. This results in alternating patterns of magnetic polarity stripes on the ocean floor.
What cause a new sea floor to be created and how is it created?
Sea floor spreading causes this. As the floor spreads apart new magma is being pushed up through the ridge from the mantle through convection currents. It's like a recycling system.
