Its inner boundary is marked by the Lehmann discontinuity, and its interaction with the mantle in so-called ultra low velocity and rigidity zones may explain the phenomenon of nutation.
Its inner boundary is marked by the Lehmann discontinuity, and its interaction with the mantle in so-called ultra low velocity and rigidity zones may explain the phenomenon of nutation. Convection in it in the Glatzmeier- Roberts model is implicated as the driving factor behind the reversals of Earth's magnetic field, and its liquidity is due to its lower melting point compared to the silicates above it outweighing the higher pressure exerted on it. Composed mostly of nickel and iron, for 10 points name this layer of the Earth, located between 1200 and 3400 kilometers from the center of the earth between the inner core and the mantle.
Its inner boundary is marked by the Lehmann discontinuity, and its interaction with the mantle in so-called ultra low velocity and rigidity zones may explain the phenomenon of nutation.
{Outer core}