This layer is separated from the liquid outer core by the Gutenberg discontinuity and from the crust by the Mohorovicic discontinuity.
Rustad and Yin studied the distribution of iron isotopes in the lower portion of this region. Wadsleyite and ringwoodite are likely found in its transition zones. Its lowest portions likely contain post-perovskite, and its upper portion likely consists of peridotite, a rock composed of the silicate minerals olivine and pyroxene. The bottom portion of this layer is home to the D double prime region, and upwellings of magma are its namesake plumes. This layer is separated from the liquid outer core by the Gutenberg discontinuity and from the crust by the Mohorovicic discontinuity. For 10 points, name this layer of Earth's interior.
Rustad and Yin studied the distribution of iron isotopes in the lower portion of this region.
{mantle}