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- Conrad_discontinuity abstract "The Conrad discontinuity corresponds to the sub-horizontal boundary in continental crust at which the seismic wave velocity increases in a discontinuous way. This boundary is observed in various continental regions at a depth of 15 to 20 km, however it is not found in oceanic regions.The Conrad discontinuity (named after the seismologist Victor Conrad) is considered to be the border between the upper continental crust and the lower one. It is not as pronounced as the Mohorovičić discontinuity, and absent in some continental regions. Up to the middle 20th Century the upper crust in continental regions was seen to consist of felsic rocks such as granite (SiAl, for silica-aluminium), and the lower one to consist of more magnesium-rich mafic rocks like basalt (SiMa, for silica-magnesium). Therefore, the seismologists of that time considered that the Conrad discontinuity should correspond to a sharply defined contact between the chemically distinct two layers, SiAl and SiMa.However, from the 1960s onward this theory was strongly contested among geologists. The exact geological significance of the Conrad discontinuity is still not clarified. The possibility that it represents the transition from amphibolite facies to granulite facies metamorphism has been given some support from observations of the uplifted central part of the Vredefort Dome and the surrounding Kaapvaal craton.".
- Conrad_discontinuity wikiPageID "16082692".
- Conrad_discontinuity wikiPageRevisionID "594263297".
- Conrad_discontinuity hasPhotoCollection Conrad_discontinuity.
- Conrad_discontinuity subject Category:Plate_tectonics.
- Conrad_discontinuity subject Category:Structure_of_the_Earth.
- Conrad_discontinuity comment "The Conrad discontinuity corresponds to the sub-horizontal boundary in continental crust at which the seismic wave velocity increases in a discontinuous way. This boundary is observed in various continental regions at a depth of 15 to 20 km, however it is not found in oceanic regions.The Conrad discontinuity (named after the seismologist Victor Conrad) is considered to be the border between the upper continental crust and the lower one.".
- Conrad_discontinuity label "Conrad discontinuity".
- Conrad_discontinuity label "Conrad-Diskontinuität".
- Conrad_discontinuity label "Conraddiscontinuïteit".
- Conrad_discontinuity label "Descontinuidade de Conrad".
- Conrad_discontinuity label "Discontinuità di Conrad".
- Conrad_discontinuity label "Nieciągłość Conrada".
- Conrad_discontinuity label "Граница Конрада".
- Conrad_discontinuity label "コンラッド不連続面".
- Conrad_discontinuity label "康拉德不連續面".
- Conrad_discontinuity sameAs Conrad-Diskontinuität.
- Conrad_discontinuity sameAs Discontinuità_di_Conrad.
- Conrad_discontinuity sameAs コンラッド不連続面.
- Conrad_discontinuity sameAs 콘래드_불연속면.
- Conrad_discontinuity sameAs Conraddiscontinuïteit.
- Conrad_discontinuity sameAs Nieciągłość_Conrada.
- Conrad_discontinuity sameAs Descontinuidade_de_Conrad.
- Conrad_discontinuity sameAs m.03qnm5v.
- Conrad_discontinuity sameAs Q1126660.
- Conrad_discontinuity sameAs Q1126660.
- Conrad_discontinuity wasDerivedFrom Conrad_discontinuity?oldid=594263297.
- Conrad_discontinuity isPrimaryTopicOf Conrad_discontinuity.