Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Obduction

  • Nicholas Arndt
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1091-3

Definition

Obduction is the thrusting of segments of oceanic crust and mantle onto continental crust at convergent plate margins. A slice of obducted oceanic crust is called an ophiolite. Commonly, blueschist-facies metamorphic rocks are exposed in front of the obducted ophiolite. During periods of enhanced ridge push, while most of the oceanic plate is subducted, slices of younger (and thus hotter and more buoyant) material are thrust onto small continental fragments or onto the margins of continents, particularly during the closure of ocean basins preceding continent–continent collision.

See Also

Keywords

Bioorganic Chemistry Continental Crust Metamorphic Rock Oceanic Crust Ocean Basin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Maison des GéosciencesLGCA, Université J. FourierSt-Martin d’HèresFrance