Murakami and Nata used a diamond cell to create an extremely high pressure material called "post-perovskite," theorized to compose much of the lower regions of this area.
Murakami and Nata used a diamond cell to create an extremely high pressure material called "post-perovskite," theorized to compose much of the lower regions of this area. In Earth's early years, gases escaping from this area likely deposited a lot of xenon, and most craton roots reach into this general layer. Olivine is abundant in its upper regions, and it contains the Lehmann Discontinuity above its transition zone. The bottom boundary of this layer contains the area denoted D'' ("D double prime"), which itself contains a discontinuity named for Beno Gutenberg, and beyond that boundary P-waves are slower and S-waves stop due to the liquid composition of the area beneath this layer. Also containing the mesosphere and the asthenosphere, FTP, identify this region which comprises about 70% of the Earth and lies across the Moho discontinuity from the Earth's crust.
Murakami and Nata used a diamond cell to create an extremely high pressure material called "post-perovskite," theorized to compose much of the lower regions of this area.
{Mantle} (prompt on “asthenosphere” before “Lehmann”)