Nena was an ancient minor supercontinent that consisted of the cratons of Arctica, Siberia, Baltica, and East Antarctica.
Contents
Nena formed about 1,950 million years ago but became part of the global supercontinent Columbia around 1,820 million years ago. Nena broke up about 590 million years ago.
Nomenclature
Nena is an acronym that derives from Siberia 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
Nena (supercontinent) Wikipedia(Text) CC BY-SA