Nena (supercontinent)

U–Pb ages of 5246 concordant detrital zircons from 40 of Earth's major rivers (Nena is referred to as Nuna)^[1]

Nena was an ancient minor supercontinent that consisted of the cratons of Arctica, Baltica, and East Antarctica.

Nena formed about 1.8 billion years ago but became part of the global supercontinent Columbia around 1.1 billion years ago.

Nomenclature

Life timeline

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Earliest multicellular life

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Hirnantian glaciation*

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Earliest tetrapods

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Karoo ice age*

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Earliest apes / humans

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Quaternary ice age*

(million years ago)

*Ice Ages

Nena is an acronym that derives from Northern Europe and North America, but in contemporary research is often referred to as Nuna.

Extent

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

References

^ Campbell, Ian H., Charlotte M. Allen. "Formation of Supercontinents Linked to Increases in Atmospheric Oxygen." Nature. 1 (2008): 554–558.

Sankaran, A. V., The Supercontinent Medley: Recent Views. Current Science, 25 August 2003.

External links

Multimedia

In research

Referred to as Nuna

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[campbell-1] Campbell, Ian H., Charlotte M. Allen. "Formation of Supercontinents Linked to Increases in Atmospheric Oxygen." Nature. 1 (2008): 554–558.

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