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Iron minerals that are present in magma or lava along the ridge that has not completely crystallized into rock are aligned with the Earth's polarity. When the magma or lava cools and solidifies completely, the magnetic orientation of the Earth at that time is preserved in the body of igneous rock.
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How do rocks along the central valley of the mid-ocean ridge provide evidence of sea- floor spreading?
Rocks along the central valley of the mid-ocean ridge display symmetrical patterns of magnetic striping where new oceanic crust is formed. This occurs as magma is extruded along the ridge, creating a record of Earth's changing magnetic field over time. The alternating magnetic polarity of these rocks provides concrete evidence for sea-floor spreading and the movement of tectonic plates.
How do ocean basin magnetic reversals prove plate tectonics exists?
They technically don't. They do provide evidence for it, however, in that they occur in pairs on either side of a rift, providing strong evidence that the rocks on either side were deposited at the same time and that the rifts are spreading.
Magnetic reversals provide strong evidence for what at the bottom of the ocean?
Magnetic reversals provide strong evidence for the process of seafloor spreading at the bottom of the ocean. As magma rises and solidifies at mid-ocean ridges, it records the Earth's magnetic field direction, which periodically reverses. This creates a pattern of magnetic stripes on either side of the ridge, demonstrating how new oceanic crust is formed and pushed away from the ridge over time. These patterns serve as key evidence for the theory of plate tectonics.
How do magnetic patterns in the rocks along the mid-ocean ridges explain seafloor spreading?
Magnetic patterns in the rocks along mid-ocean ridges reveal a symmetrical arrangement of magnetic stripes that record Earth's magnetic field reversals over time. As magma rises and solidifies at the ridge, it captures the Earth's magnetic orientation at that moment. This process occurs continuously, causing new crust to form and pushing older crust away from the ridge, which is the fundamental principle of seafloor spreading. The mirror-image patterns on either side of the ridge provide strong evidence for this ongoing geological process.
What was the theory that was shown to be correct by age evidence and magnetic clues?
The theory that was confirmed by age evidence and magnetic clues is the theory of plate tectonics. Evidence such as the ages of rocks on either side of ocean ridges and the alignment of magnetic minerals in oceanic crust support the idea that Earth's lithosphere is broken into rigid plates that move and interact with each other.
What on the ocean floor is evidence that earths magnetic field changes?
Evidence that Earth's magnetic field changes can be found in the alignment of magnetic minerals in rocks on the ocean floor. As magma solidifies into new rock, the magnetic minerals within it align with the current magnetic field direction. By studying the alignment of these minerals in rocks of different ages along the ocean floor, scientists can track changes in the Earth's magnetic field over time.
Is there evidence that seafloor-spreading?
Yes, there is evidence supporting seafloor spreading, including magnetic striping patterns on the ocean floor, the age progression of seafloor away from mid-ocean ridges, and the presence of hydrothermal vents along mid-ocean ridges that release magma from the Earth's mantle.
How do rocks along the central valley of the mid-ocean ridge provide evidence of sea- floor spreading?
Rocks along the central valley of the mid-ocean ridge display symmetrical patterns of magnetic striping where new oceanic crust is formed. This occurs as magma is extruded along the ridge, creating a record of Earth's changing magnetic field over time. The alternating magnetic polarity of these rocks provides concrete evidence for sea-floor spreading and the movement of tectonic plates.
What are magnetic stripes on the seafloor?
Magnetic stripes on the seafloor are alternating bands of magnetized rock that form parallel to mid-ocean ridges. These stripes are a result of Earth's magnetic field changing direction over time and getting preserved in the rocks as they cool and solidify. They provide evidence for seafloor spreading and plate tectonics.
The pattern of magnetic reversals along the sides of mid-ocean ridges resembles?
The pattern of magnetic reversals along the sides of mid-ocean ridges resembles stripes that alternate in polarity, created as new oceanic crust is formed at mid-ocean ridges and records the Earth's changing magnetic field. These magnetic stripes provide evidence for seafloor spreading and plate tectonics.
What is evidence that our planet has plates tectonics?
Chains of volcanos along ocean Coastlines
What is sea floor spreading and what evidence do we have to prove it is happening?
Magnetic minerals on the ocean floor.
How do ocean basin magnetic reversals prove plate tectonics exists?
They technically don't. They do provide evidence for it, however, in that they occur in pairs on either side of a rift, providing strong evidence that the rocks on either side were deposited at the same time and that the rifts are spreading.
How do earths magnetic pole reversals provide evidence for plate tectonics?
Magnetic stripes can be seen as you move away from ocean ridges.
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.
How do magnetic stripes show Earth's history of magnetic fields?
As you move away from an ocean ridge, the rocks get older.
Strips of alternating magnetic polarities found in rocks in the ocean basins .?
provide evidence for sea-floor spreading
