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- Core–mantle_boundary abstract "The core–mantle boundary (CMB in the parlance of solid earth geophysicists) lies between the Earth's silicate mantle and its liquid iron-nickel outer core. This boundary is located at approximately 2880 km (1798 mi) depth beneath the Earth's surface. The boundary is observed via the discontinuity in seismic wave velocities at that depth. This discontinuity is 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. Recent evidence suggests a distinct boundary layer directly above the CMB possibly made of a novel phase of the basic perovskite mineralogy of the deep 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 LLSVPs (Large Low Shear Velocity Provinces).The ~200 km thick layer of the lower mantle directly above the boundary is referred to as the D″ ("D double-prime" or "D prime prime") and is sometimes included in discussions regarding the core–mantle boundary zone. The D″ name originates from the mathematician Keith Bullen's designations for the Earth's layers. His system was to label each layer alphabetically, A through G, with the crust as 'A' and the inner core as 'G'. In his 1942 publication of his model, the entire lower mantle was the D layer. In 1950, Bullen found his 'D' layer to actually be two different layers. The upper part of the D layer, about 1800 km thick, was renamed D′ (D prime) and the lower part (the bottom 200 km) was named D″.The bottom of D″ has been observed in some regions to be marked by a seismic velocity discontinuity (sometimes known as the 'Gutenberg discontinuity', after German geophysicist Beno Gutenberg) . Slow small-scaled structures have been discovered on the core-mantle boundary, these are dubbed ultra-low velocity zones (ULVZs).".
- Core–mantle_boundary thumbnail Slice_earth.svg?width=300.
- Core–mantle_boundary wikiPageExternalLink earthsinterior.html.
- Core–mantle_boundary wikiPageExternalLink aa021300a.htm.
- Core–mantle_boundary wikiPageExternalLink node37.html.
- Core–mantle_boundary wikiPageExternalLink 1130014.htm.
- Core–mantle_boundary wikiPageExternalLink 679-1.html.
- Core–mantle_boundary wikiPageID "1431559".
- Core–mantle_boundary wikiPageLength "4733".
- Core–mantle_boundary wikiPageOutDegree "23".
- Core–mantle_boundary wikiPageRevisionID "651029016".
- Core–mantle_boundary wikiPageWikiLink Beno_Gutenberg.
- Core–mantle_boundary wikiPageWikiLink Category:Geophysics.
- Core–mantle_boundary wikiPageWikiLink Category:Structure_of_the_Earth.
- Core–mantle_boundary wikiPageWikiLink Crust_(geology).
- Core–mantle_boundary wikiPageWikiLink EarthScope.
- Core–mantle_boundary wikiPageWikiLink Earthscope.
- Core–mantle_boundary wikiPageWikiLink Geophysics.
- Core–mantle_boundary wikiPageWikiLink Iron.
- Core–mantle_boundary wikiPageWikiLink Keith_Edward_Bullen.
- Core–mantle_boundary wikiPageWikiLink Large_Low_Shear_Velocity_Provinces.
- Core–mantle_boundary wikiPageWikiLink Mantle_(geology).
- Core–mantle_boundary wikiPageWikiLink Nickel.
- Core–mantle_boundary wikiPageWikiLink Outer_core.
- Core–mantle_boundary wikiPageWikiLink P-wave.
- Core–mantle_boundary wikiPageWikiLink Planetary_core.
- Core–mantle_boundary wikiPageWikiLink Post-perovskite.
- Core–mantle_boundary wikiPageWikiLink S-wave.
- Core–mantle_boundary wikiPageWikiLink Seismic_tomography.
- Core–mantle_boundary wikiPageWikiLink Seismic_wave.
- Core–mantle_boundary wikiPageWikiLink Silicate.
- Core–mantle_boundary wikiPageWikiLink Silicate_perovskite.
- Core–mantle_boundary wikiPageWikiLink Ultra_low_velocity_zone.
- Core–mantle_boundary wikiPageWikiLink File:Slice_earth.svg.
- Core–mantle_boundary wikiPageWikiLinkText "''D''′′-layer".
- Core–mantle_boundary wikiPageWikiLinkText "Core–mantle boundary".
- Core–mantle_boundary wikiPageWikiLinkText "Core–mantle boundary#D″".
- Core–mantle_boundary wikiPageWikiLinkText "Core–mantle_boundary".
- Core–mantle_boundary wikiPageWikiLinkText "D" seismic discontinuity".
- Core–mantle_boundary wikiPageWikiLinkText "D″ layer".
- Core–mantle_boundary wikiPageWikiLinkText "boundary between the core and mantle".
- Core–mantle_boundary wikiPageWikiLinkText "core–mantle boundary".
- Core–mantle_boundary wikiPageWikiLinkText "mantle-core boundary".
- Core–mantle_boundary hasPhotoCollection Core–mantle_boundary.
- Core–mantle_boundary wikiPageUsesTemplate Template:Anchor.
- Core–mantle_boundary wikiPageUsesTemplate Template:Citation.
- Core–mantle_boundary wikiPageUsesTemplate Template:Earthsinterior.
- Core–mantle_boundary subject Category:Geophysics.
- Core–mantle_boundary subject Category:Structure_of_the_Earth.
- Core–mantle_boundary comment "The core–mantle boundary (CMB in the parlance of solid earth geophysicists) lies between the Earth's silicate mantle and its liquid iron-nickel outer core. This boundary is located at approximately 2880 km (1798 mi) depth beneath the Earth's surface. The boundary is observed via the discontinuity in seismic wave velocities at that depth. This discontinuity is due to the differences between the acoustic impedances of the solid mantle and the molten outer core.".
- Core–mantle_boundary label "Core–mantle boundary".
- Core–mantle_boundary sameAs Discontinuïtat_de_Gutenberg.
- Core–mantle_boundary sameAs Gutenbergova_diskontinuita.
- Core–mantle_boundary sameAs Kern-Mantel-Grenze.
- Core–mantle_boundary sameAs Discontinuidad_de_Gutenberg.
- Core–mantle_boundary sameAs مرز_هسته–گوشته.
- Core–mantle_boundary sameAs Discontinuité_de_Gutenberg.
- Core–mantle_boundary sameAs Descontinuidade_de_Gutenberg.
- Core–mantle_boundary sameAs תחום_אי_הרציפות_וייכרט-גוטנברג.
- Core–mantle_boundary sameAs Discontinuità_di_Gutenberg.
- Core–mantle_boundary sameAs グーテンベルク不連続面.
- Core–mantle_boundary sameAs 구텐베르크_불연속면.
- Core–mantle_boundary sameAs Wiechert-Gutenbergdiscontinuïteit.
- Core–mantle_boundary sameAs Nieciągłość_Gutenberga.
- Core–mantle_boundary sameAs Descontinuidade_de_Gutenberg.
- Core–mantle_boundary sameAs m.05106j.
- Core–mantle_boundary sameAs Gutenbergova_diskontinuita.
- Core–mantle_boundary sameAs Gutenbergova_nezveznost.
- Core–mantle_boundary sameAs Wiechert-Gutenberg_süreksizliği.
- Core–mantle_boundary sameAs Điểm_gián_đoạn_Gutenberg.
- Core–mantle_boundary sameAs Q1330051.
- Core–mantle_boundary sameAs Q1330051.
- Core–mantle_boundary sameAs 核幔邊界.
- Core–mantle_boundary wasDerivedFrom Core–mantle_boundary?oldid=651029016.
- Core–mantle_boundary depiction Slice_earth.svg.
- Core–mantle_boundary isPrimaryTopicOf Core–mantle_boundary.