Possible chemical leftovers from early Earth sit near the core
Down near the Earth’s core, there are zones where seismic waves slow to a crawl. New research finds that these enigmatic and descriptively-named ultra-low velocity zones are surprisingly layered. Modeling suggests that it’s possible some of these zones are leftovers from the processes that shaped the early Earth — remnants of incomplete mixing like clumps of flour in the bottom of a bowl of batter. …read more
