Definitions for obduction

This page provides all possible meanings and translations of the word obduction

Webster Dictionary

  1. Obduction(noun)

    the act of drawing or laying over, as a covering

Freebase

  1. Obduction

    Obduction is the overthrusting of continental crust by oceanic crust or mantle rocks at a convergent plate boundary, such as closing of an ocean or a mountain building episode. This process is uncommon as the denser oceanic lithosphere usually subducts underneath the less dense continental plate. Obduction occurs where a fragment of continental crust is caught in a subduction zone with resulting overthrusting of oceanic mafic and ultramafic rocks from the mantle onto the continental crust. Obduction often occurs where a small tectonic plate is caught between two larger plates, with the crust welding onto an adjacent continent as a new terrane. When two continental plates collide, obduction of the oceanic crust between them is often a part of the resulting orogeny. Obduction is a process involving several mechanisms. These may include upwedging, compressional telescoping, gravity sliding or transformation of a spreading ridge to a subduction zone. Most obductions appear to have initiated at back-arc basins above the subduction zones during the closing of an ocean or an orogeny.

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"obduction." Definitions.net. STANDS4 LLC, 2014. Web. 22 Oct. 2014. <http://www.definitions.net/definition/obduction>.

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