Lava flows reveal clues to magnetic field reversals

(PhysOrg.com) -- Ancient lava flows are guiding a better understanding of what generates and controls the Earth's magnetic field — and what may drive it to occasionally reverse direction.

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<p><a href="http://www.physorg.com/news141575305.html">Lava flows reveal clues to magnetic field reversals</a></p> <p>(PhysOrg.com) -- Ancient lava flows are guiding a better understanding of what generates and controls the Earth's magnetic field — and what may drive it to occasionally reverse direction.</p>