What does obduction mean?

Definitions for obduction

Here are all the possible meanings and translations of the word obduction.

Webster Dictionary

  1. Obduction(noun)

    the act of drawing or laying over, as a covering

  2. Origin: [L. obductio.]

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.

Numerology

  1. Chaldean Numerology

    The numerical value of obduction in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of obduction in Pythagorean Numerology is: 4

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