The article Mohorovičić discontinuity on Wikipedia projects: (en) (eo) Malkontinuo de Mohorovičić · (es) Discontinuidad de Mohorovičić · (et). Andrija Mohorovičić. 0 references. Commons category. Mohorovičić discontinuity eowiki Malkontinuo de Mohorovičić; eswiki Discontinuidad de Mohorovičić. nive” del mar” niveau” de la mer’ Meeresspiegel” livello” del mare” deep-sea floor Mohorovicic discontinuity discontinuidad de Mohorovicic discontinuités de .
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The core—mantle boundary CMB in the parlance of solid earth geophysicists of the Earth lies between the planet’s silicate mantle and its liquid iron – nickel outer core. The boundary is observed via the discontinuity in seismic wave velocities at that depth due to the differences between the acoustic impedances of the solid mantle and the molten outer core. P-wave velocities are much slower in the outer core than in the deep mantle while S-waves do not exist at all in the liquid portion of the core.
Category:Mohorovičić discontinuity – Wikimedia Commons
Recent evidence suggests a distinct boundary layer directly above the CMB possibly made of a novel phase of the basic perovskite mineralogy of the mohorovlcic mantle named post-perovskite.
Seismic tomography studies have shown significant irregularities within the boundary zone and appear to be dominated by the African and Pacific large low-shear-velocity provinces LLSVPs.
The uppermost section of the outer core is thought to be about —1, K hotter than the overlying mantle, creating a thermal boundary layer. His system was to label each layer alphabetically, A through G, with the crust as ‘A’ and the inner core as ‘G’. A seismic discontinuity occurs within Earth’s interior at a depth of about 2, km 1, mi below the surface, where there is an abrupt change in the speed of seismic waves generated by earthquakes or explosions that travel through Earth.
S waves shear material, and cannot transmit through liquids, so it is thought that the unit above the discontinuity is solid, while the unit below is in a liquid or molten form.
The discontinuity was discovered by Beno Gutenberga seismologist who made several important contributions to the study and understanding of the Earth’s interior. In modern times, however, the term Gutenberg discontinuity or the “G” is most commonly used in reference to a decrease in seismic velocity with depth that is sometimes observed at about km below the Discontinjidad oceans.
From Wikipedia, the free encyclopedia. Discontinuity where the bottom of the planet’s mantle meets the outer layer of the core.
Earth and Planetary Science Letters. Impacts of the Post Perovskite Phase”.
Physics of the Earth and Planetary Interiors. Melt at the Lithosphere-Asthenosphere Boundary”. Structure of the Earth.
Conrad continental crust Gutenberg upper mantle Lehmann upper mantle. Retrieved from ” https: Geophysics Structure of the Earth.