👤 whose
Whose work first suggested Earth's magnetic field reversals could be recorded in rocks?
Quick Answer
Bernard Brunhes is credited with early evidence that volcanic rocks record reversed magnetism. His work in the early 1900s anticipated modern paleomagnetism.
The Full Story
French geophysicist Bernard Brunhes discovered in 1906 that some volcanic rocks had magnetization opposite to Earth's current magnetic field. This suggested that the planet's magnetic field had reversed in the past. Brunhes's observation became a foundation for paleomagnetism, the study of ancient magnetic fields preserved in rocks. Later research showed that geomagnetic reversals are common over geologic time.
Key Facts
1.Brunhes made the key observation in 1906
2.Some rocks preserve reversed magnetization
3.Paleomagnetism became vital to plate tectonics
YouTube Angle
Suggested video title for this topic:
"The rocks that remembered Earth's magnetic flips"
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