A new study suggests that material from Earth's core is leaking into the mantle and reaching the surface. The research, which challenges the long-held belief of an impassable core-mantle boundary, is based on the discovery of primordial isotopes like helium-3 and ruthenium-100 in volcanic rocks.
quantamagazine.org/earths-core…
Earth’s Core Appears To Be Leaking Up and Out of Earth’s Surface | Quanta Magazine
Strong new evidence suggests that primordial material from the planet’s center is somehow making its way out. Continent-size entities anchored to the core-mantle boundary might be involved.Robin George Andrews (Quanta Magazine)
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