Encyclopedia of Astrobiology

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

Supercontinent

  • Daniele L. Pinti
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1764-3

Definition

A supercontinent is a landmass comprising a large fraction of the entire continental crust. It is the product of the assembly of many smaller continents into one single continent. Supercontinents form in cycles, coming together and breaking apart about every 500 million years as a result of plate tectonic movements. Examples include Rodinia (from 1,100 to 750 Ma) and Pangea (between 300 and 200 Ma). The latter split apart between 200 and 180 Ma ago to form two smaller supercontinents, Laurasia and Gondwana. The oldest putative supercontinent is Vaalbara (3.1–2.5 Ga) which regrouped ancient Archean terranes of the Pilbara Craton (Western Australia) and the Kaapvaal Craton (South Africa).

See Also

Keywords

Bioorganic Chemistry Large Fraction Continental Crust Tectonic Movement Plate Tectonic 
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.GEOTOP Research Center for Geochemistry and GeodynamicsUniversité du Québec à MontréalMontréalCanada