Definitions for obduction
ob·duc·tion

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. Obductionnoun

   The act of covering, or laying a cover.

   Etymology: from obductio, obduco, Latin.

WikipediaRate this definition:0.0 / 0 votes

1. Obduction

   Obduction is a geological process whereby denser oceanic crust (and even upper mantle) is scraped off a descending ocean plate at a convergent plate boundary and thrust on top of an adjacent plate. When oceanic and continental plates converge, normally the denser oceanic crust sinks under the continental crust in the process of subduction. Obduction, which is less common, normally occurs in plate collisions at orogenic belts (where an oceanic plate that is subducting scrapes some of its material onto the continental plate) or back-arc basins (places where the edge of a continent is pulled away from the rest of the continent due to the stress of plate collision).Obduction of oceanic lithosphere produces a characteristic set of rock types called an ophiolite. This assemblage consists of deep-marine sedimentary rock (chert, limestone, clastic sediments), volcanic rocks (pillow lavas, volcanic glass, volcanic ash, sheeted dykes and gabbros) and peridotite (mantle rock). John McPhee describes ophiolite formation by obduction as "where ocean crust slides into a trench and goes under a continent, [and] a part of the crust - i.e., an ophiolite - is shaved off the top and ends up on the lip of the continent."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 (both island arc and oceanic) 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.Most obductions appear to have initiated at back-arc basins above the subduction zones during the closing of an ocean or an orogeny.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Obductionnoun

   the act of drawing or laying over, as a covering

2. Etymology: [L. obductio.]

WikidataRate this definition:1.0 / 1 vote

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.

How to pronounce obduction?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say obduction in sign language?

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

References

1. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=obduction
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Obduction
3. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/obduction
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=obduction