3800-3600 Ma

§ Eoarchean Era

This early era in the history of the Earth was appropriatly named, from the Greek word for "dawn" eos and "ancient" archios. Solid land began making its appearance in this era (around 3.3 billion years ago) in the form of Vaalbara, the first supercontinent.

The Eoarchean is an era in the geologic timescale lasting from 3800 Ma to 3600 Ma (million years ago). It is the first part of the Archaean Eon, preceded by the Hadean eon. In chronostratigraphy, its zone rank is an erathem.

The International Commission on Stratigraphy does not recognize the lower boundary of the era nor the preceding Hadean Eon.

The Eoarchean was followed by the Paleoarchean era.

§ Sources

• http://en.wikipedia.org/wiki/Eoarchean

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