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The lower mantle is the region of Earth's interior from 660 to 2900 km below the surface, between the transition zone and the outer core. It has a pyrolitic or chondritic composition, and contains bridgmanite, ferropericlase, and calcium-silicate perovskite phases that undergo a spin transition under high pressure.
Learn about the lower mantle, the second layer of Earth's interior, composed of magnesium- and iron-bearing silicates. Find out how it differs from the upper mantle and the core, and how it relates to the planet's structure and evolution.
1 Ιαν 2021 · Learn about the lower mantle, the deepest and densest part of Earth's interior, and its mineralogy, phase transitions, and seismic properties. Explore the major discontinuities, subdivisions, and features of the lower mantle, such as the D″ layer and the ultra low velocity zone.
1 Ιαν 2014 · Learn about the lower mantle, the deepest and densest part of Earth's interior, and its mineralogy, phase transitions, and seismic properties. Explore the major discontinuities and subdivisions of the mantle, and how they relate to temperature and composition variations.
30 Απρ 2024 · Learn about the mantle, the mostly solid bulk of Earth's interior that lies between the core and the crust. Explore the upper mantle, the transition zone, the lower mantle, and D', the strange region where the mantle meets the core.
The lower mantle is the deepest layer of Earth's mantle, extending from 660 to 2,891 km below the surface. It is composed mainly of bridgmanite and ferropericlase, and may contain water and remnants of Theia, the impactor that formed the Moon.
A book by Felix V. Kaminsky that reviews the geological, mineralogical, experimental and geophysical data on the lower mantle. It covers the lower-mantle minerals, their associations, phase transitions, seismic boundaries, and the D" layer.
