Nena (supercontinent)

Nena, an acronym for Northern Europe–North America, was the Early Proterozoic amalgamation of Baltica and Laurentia into a single "cratonic landmass", a name first proposed in 1990.[1] Since then several similar Proterozoic supercontinents have been proposed, including Nuna and Arctica, that include other Archaean cratons, such as Siberia and East Antarctica.[2]

For other uses, see Nena (disambiguation).
Not to be confused with Nuna (supercontinent).

In the original concept Nena formed c. 1,900 million years ago in the Penokean, Makkovikan, Ketilidian, and Svecofennian orogenies.[3] However, because Nena excludes several known Archaean cratons, including those in India and Australia, it is strictly speaking not a supercontinent. Nena, or Nuna, can, nevertheless be thought of as the core of Columbia, another supercontinent concept with several proposed configurations.[2]

Nena as a continent has been associated with the Sudbury Basin Impact.

References
Notes
  1. Gower, Ryan & Rivers 1990, Introduction, p. 2
  2. Meert 2012, pp. 990–991; Figg. 5-6, pp. 990–991
  3. Gower, Ryan & Rivers 1990, Abstract
Sources
  • Gower, C. F.; Ryan, A. B.; Rivers, T. (1990). "Mid-Proterozoic Laurentia–Baltica: an overview of its geological evolution and a summary of the contributions made by this volume". In Gower, C. F.; Rivers, T.; Ryan, B. (eds.). Mid-Proterozoic Laurentia-Baltica (PDF). St. John's Newfoundland: Geological Association of Canada. pp. 1–20. Retrieved 1 April 2018.CS1 maint: ref=harv (link)
  • Meert, J. G. (2012). "What's in a name? The Columbia (Paleopangaea/Nuna) supercontinent" (PDF). Gondwana Research. 21 (4): 987–993. doi:10.1016/j.gr.2011.12.002. Retrieved 1 April 2018.CS1 maint: ref=harv (link)
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