Nena (supercontinent)
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Nena was an ancient minor supercontinent. Nena consisted of the cratons of Arctica, Baltica, and Antarctica.
Chronology
- ~1.8 billion years ago, the supercontinent Columbia was formed. All of the pieces of Nena were together.
- ~1.5 billion years, the supercontinent Columbia disintegrated, leaving Nena as one of the continents.
- ~1.1 billion, Nena became part of the supercontinent Rodinia.
- ~750 million years ago, Rodinia broke apart into two minor supercontinents, Protolaurasia and Protogondwana, as well as the continent Congo. Most of Nena was in Protolaurasia, but Eastern Antarctica was in Protogondwana.
- ~600 million years ago, all land was in one major supercontinent, Pannotia.
- ~540 million years ago, Pannotia rifted apart. All of the cratons of Nena separated. Arctica rifted into Siberia and Laurentia nearly rifted apart. Thus ended Nena.