Ancient Supercontinents Found Deep Within Earth
Two massive “supercontinents” have been discovered deep within Earth’s mantle, residing beneath Africa and the Pacific Ocean. Analysis of earthquake data, focusing on seismic wave attenuation, reveals these structures are significantly older and less affected by mantle convection than previously believed, suggesting a less well-mixed mantle than was assumed. The supercontinents’ large mineral grain size and minimal energy loss from seismic waves indicate an age of at least half a billion years, possibly much older. This discovery implies these regions act as anchors, influencing plate tectonics and potentially serving as reservoirs for ancient geochemical elements.
John Q. Hosedrinker