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Conrad continental crust Gutenberg upper mantle Lehmann upper mantle. This page was last edited on 28 Decemberat There is a model which explains this by differences at the surface of the inner core — melting in one hemisphere and crystallization in the other. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

File:Slice earth.svg

Discontinuidad de Lehmann D: Media needing categories as of 14 July By using this site, you agree to the Terms of Use and Privacy Policy. For the cores of other planetary bodies, see Planetary core. Karato proposed that changes in the magnetic field might also deform the inner dicsontinuidad slowly over time.

Speculation also continues that the inner core might have exhibited a variety of internal deformation patterns.


The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. This boundary is known as the Bullen discontinuity, [5] or sometimes as the Lehmann discontinuity. Retrieved from ” https: Further, if the primordial and mostly fluid still forming earth contained any significant mass es of elements denser than iron and nickel, namely the white appearance precious metals and a few others except silver, specifically the siderophile elementsthen these would necessarily have differentiated to the very center of the core into concentric nested spheres by planetary differentiationwith the most dense and stablei.

The timestamp is only as accurate discontinuiidad the clock in the camera, and it may be completely wrong. Conrad continental crust Gutenberg upper mantle Lehmann upper mantle.

Derivative works of this file: Based on rates of cooling of the core, it is estimated that the current solid inner core started solidifying approximately 0. From Wikipedia, the free encyclopedia. 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.

Impacts of the Post Perovskite Phase”. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Earth’s eccentric magnetic field”.

Earth and Planetary Science Letters. The basics of earth science. Views View Edit History. Physical Geology Grade Book. Retrieved from ” https: The kehmann 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.


Inner core – Wikipedia

Structure of the Earth. This variation is surprising, since lateral temperature variations along the inner-core boundary are known to be extremely small this conclusion is confidently constrained by magnetic field observations.

Archived from the original on Earth and Planetary Science Letters. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file.

Dziewonski and Gilbert established that measurements of normal modes of vibration discontinuuidad Earth caused by large earthquakes were consistent with a liquid outer core.

There is an East—West asymmetry in the inner core seismological data. Even though it is growing into liquid, it is solid, due to the very high pressure that keeps it compacted together even if the temperature is extremely high.