A mysterious find on Easter Island, investigated by a team of geologists, suggests that the Earth's mantle seems to behave differently than once thought.
These metamorphic ages obtained are consistent with the ages of the orogenic events occurring in the area, as well as the plutonism, and show that there are several pulses of metamorphism preserved in ...
Geography textbooks describe the Earth's mantle beneath its plates as a well-mixed viscous rock that moves along with those plates like a conveyor belt. But that idea, first set out some 100 years ...