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That magnetic minerals spreading from a mid-ocean ridge
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What is shown by magnetic minerals spreading from a mid-ocean ridge?
That magnetic minerals spreading from a mid-ocean ridge
What is shown by magnetic minerals spreading from a mid ocean ridge?
That magnetic minerals spreading from a mid-ocean ridge
What is the significance of the patterns of offsets along the mid-ocean ridge?
the matching patterns on either side of the mid-ocean ridge could be explained by new ocean crust forming at the ridge and spreading away from it as ocean crust forms it obtains the polarity of the earth's magnetic field at that time over time the strength of the earths magnetic field changes when new ocean crust forms at the center of the spreading it obtains a new kind of magnetic polarity over time a series of magnetic ''stripes'' are formed
First related the symmetrical magnetic patterns in seafloor basalts to seafloor spreading at a mid-ocean ridge?
Lawrence W. Morley, Frederick John Vine, and Drummond Hoyle Matthews were the first to tie magnetic stripe anomalies to seafloor spreading. The magnetic anomalies was the first evidence that supported the theory of seafloor spreading.
Who first related the symmetrical magnetic patterns in seafloor basalt to seafloor spreading at a mid ocean ridge?
Vine and Matthews
What structure on the seafloor would have magnetic striping?
A mid-ocean ridge would have magnetic striping on the seafloor. This striping is caused by the alternating polarities of Earth's magnetic field recorded in the basaltic rocks as they cool and solidify at the mid-ocean ridge, providing evidence for seafloor spreading.
Why do bands indicating magnetic reversals appear to be of similar width on both sides of a mid-ocean ridge?
They appear to be similar in width because new crust formation is nearly equal on each side of the fault.
How do rocks that formed at mid-ocean ridges show that magnetic reversal have occurred?
Rocks formed at mid-ocean ridges exhibit patterns of magnetic stripes that record Earth's magnetic reversals. As magma rises and solidifies at the ridge, iron-rich minerals align with the Earth's magnetic field, locking in a record of the magnetic orientation at that time. When a magnetic reversal occurs, new rocks forming at the ridge will display the opposite magnetic alignment, creating a symmetrical pattern of alternating magnetic orientations on either side of the ridge. This evidence supports the theory of seafloor spreading and provides a timeline of Earth's magnetic history.
How does seafoor age and magnetic clues support seafloor spreading?
Seafloor is youngest near the mid-ocean ridges and gets progressively older as you move away from the ridge. Magnetic stripes on the seafloor provide evidence of seafloor spreading, as they show alternating patterns of normal and reversed magnetic polarity that match the Earth's magnetic reversals over time. This supports the theory of seafloor spreading as new oceanic crust is created at the mid-ocean ridge and spreads outward.
Why are the magnetic bands in the eastern Pacific Ocean so far apart compared to the magnetic bands along the Mid Atlantic Ridge?
The magnetic bands in the eastern Pacific Ocean are more spread out because the spreading rate of the seafloor there is slower compared to the Mid Atlantic Ridge. Slower spreading rates lead to wider magnetic bands as less new crust is being formed over a longer period of time. Conversely, faster spreading rates at the Mid Atlantic Ridge result in narrower magnetic bands due to the more rapid formation of new crust.
What evidence do scientists have that verify that indeed the earths plates are spreading at the mid-ocean ridge?
Scientists have gathered evidence for plate spreading at mid-ocean ridges through various methods. One key piece of evidence is the measurement of magnetic striping on the ocean floor, where symmetrical patterns of magnetic minerals record the Earth's magnetic reversals as new crust forms and pushes older crust away. Additionally, seismic data and direct measurements of seafloor spreading rates using GPS technology confirm that the plates are indeed moving apart. Oceanic rock samples from the ridge also show that younger rocks are found closer to the ridge, supporting the idea of new material being created there.
How do rocks along the central valley of the mid-ocean ridge provide evidence of the sea-floor spreading?
Rocks along the central valley of the mid-ocean ridge show a pattern of alternating polarity, indicating reversals in Earth's magnetic field. This pattern is caused by the cooling of magma at the ridge, locking in the magnetic orientation at the time of solidification. By studying the magnetic properties of these rocks, scientists can determine the rate of sea-floor spreading and the age of the oceanic crust.
