A trio of studies are the latest developments in a paradigm shift that could change how Earth history is understood. They support an assertion by a geophysicist that a once-liquid portion of the lower mantle, rather than the core, could have exceeded the thresholds needed to create Earth’s magnetic field during its early history.
Click here for original story, Earth’s mantle, not its core, may have generated planet’s early magnetic field
Source: ScienceDaily