What is basalt and how do scientists use it
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1) What is basalt and how do scientists use it to determine the direction of Earth's magnetic field over time? After molten lava emerges from a volcano, it solidifies to a rock known as basalt, which is slightly magnetic. When it cools its magnetization is in the direction of the local magnetic field at the time.
Category: Question and Answer
Updated: 2019/10/18
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