The Mesoproterozoic reference article from the English Wikipedia on 24-Apr-2004
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Mesoproterozoic

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 This period is part of the
Proterozoic era.
 Neoproterozoic
 Mesoproterozoic
 Paleoproterozoic
 Archaean
 Hadean

The Mesoproterozoic era is a geologic period that occurred between 1600 and 900 million years ago.

The major events of this era are the formation of the Rodinia supercontinent and the evolution of sexual reproduction.

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