UNIVERSE
PLANETARY INTERIORS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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molten material
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magnetic stripes
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drilling samples
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None of the above
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Detailed explanation-1: -At the mid-ocean ridge spreading axis, these flips in the direction of the Earth’s magnetic field are recorded in the magnetization of the lava. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges.
Detailed explanation-2: -Paleomagnetism-Many rocks record the strength and direction of the earth’s magnetic field at the time the rocks formed.
Detailed explanation-3: -When the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.
Detailed explanation-4: -These changes in strength and direction of the Earth’s magnetic field are recorded in the volcanic rocks beneath the seafloor.