How Geomagnetic Reversals Are Recorded in Oceanic Basalt Stripes
地磁倒转如何被记录在洋壳玄武岩条带中
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As magma rises at mid-ocean ridges, iron-rich minerals like magnetite align with Earth’s magnetic field before solidifying.
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Each new basalt layer preserves a permanent thermoremanent magnetization pointing toward the magnetic pole at crystallization time.
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