seismogenic layer

seismogenic layer

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  • Seismogenic layer — The Seismogenic Layer is the range of depths within the crust or lithosphere over which most earthquakes are initiated. Typically in continental crust this is in the uppermost 15 km. The base of this layer represents the downwards change in… …   Wikipedia

  • seismogenic zone — noun the layer of the Earths crust, at the top of the asthenosphere, where most earthquakes originate …   Wiktionary

  • Brittle-ductile transition zone — [ continental crust and changes in dominant deformation mechanisms and fault rocks in a conceptual vertical fault zone. ] The brittle ductile transition zone is the strongest part of the Earth s crust. For quartz and feldspar rich rocks in… …   Wikipedia

  • Extensional fault — An Extensional Fault is a fault that extends the pre existing geological layering. In most cases such a fault is also a normal fault, but may be rotated to have a reverse fault geometry. Extensional faults are generally planar and initiate with a …   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

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