seismic discontinuity

См. также в других словарях:

• discontinuity — noun a) a lack of continuity, regularity or sequence; a break or gap b) a subterranean interface at which seismic velocities change …   Wiktionary

• discontinuity —    1. A point where a mathematical function becomes nondefined [16].    2. An unconformity in which the bedding planes above and below the break are basically parallel, indicating a significant hiatus in the orderly sequence of sedimentary rocks …   Lexicon of Cave and Karst Terminology

• Mohorovičić discontinuity — Earth cross section showing location of the Mohorovičić discontinuity …   Wikipedia

• Lehmann discontinuity — The Lehmann discontinuity, named after seismologist Inge Lehmann, is the discontinuity in seismic velocity near a depth of 220 km, which is still debated. It appears beneath continents, but not usually beneath oceans, and does not readily appear… …   Wikipedia

• Conrad discontinuity — The Conrad discontinuity corresponds to the sub horizontal plane that takes place in the continental crust in which the seismic wave velocity increases in discontinuous mode. This plane is observed in various continental regions in a depth of 15… …   Wikipedia

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• Mantle (geology) — For other uses, see Mantle (disambiguation). Earth cutaway from core to exosphere. The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth, similar to the other… …   Wikipedia

• Moho line — The Mantle is a part of an astronomical object. Earth s mantle is a 2,900 km thick rocky shell comprising approximately 70% of Earth s volume. It is predominantly solid and overlies the Earth s iron rich core, which occupies about 30% of Earth s… …   Wikipedia

• 520-km-Diskontinuität — Die 520 km Diskontinuität ist eine seismische Grenzschicht innerhalb der Mantelübergangszone und ist gekennzeichnet durch eine Zunahme der seismischen Geschwindigkeiten mit der Tiefe. Ihre Bezeichnung orientiert sich an der durchschnittlichen… …   Deutsch Wikipedia

• Repetti-Diskontinuität — Die Repetti Diskontinuität ist eine postulierte Grenzschicht zwischen zwei Schichten des unteren Erdmantels. Sie ist definiert durch eine Zunahme der seismischen Geschwindigkeiten mit der Tiefe.[1] Benannt wurde sie nach William C. Repetti, einem …   Deutsch Wikipedia

• Inge Lehmann — (May 13, 1888 ndash; February 21, 1993), Fellow of the Royal Society of London, was a Danish seismologist who, in 1936, argued that the Earth s core is not one single molten sphere, but that an inner core exists which has physical properties that …   Wikipedia