(University of California – San Diego) 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 Scripps Institution of Oceanography 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.

Original source: https://www.eurekalert.org/pub_releases/2020-03/uoc–emn030520.php