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Eochaotian

Hierarchy:Chaotian
 Eochaotian
Classification:Era (as per International Commission on Stratigraphy)
Status:This is a proposed era and is not yet approved by the ICS or the IUGS.
Top:~4680 Ma
Base:~5000 Ma
Preceeds:Neochaotian Hyperitian
Primary Divisions:ErebreanNephelean
Proposed by NASA scientists at the Ames Research Center in 2010 to formalize terminology in the earliest stages of Earth's history.

The Eochaotian begins when the Solar Nebula became a closed system with respect to the rest of the giant molecular cloud and encompasses the agglomeration of the Solar System constituents from the nebula.
 


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